SEC Info℠  
    Home      Search      My Interests      Help      Sign In      Please Sign In

Falconstor Software Inc. – ‘10-K’ for 12/31/22 – ‘XML’

On:  Thursday, 3/23/23, at 5:13pm ET   ·   For:  12/31/22   ·   Accession #:  950170-23-9553   ·   File #:  0-23970

Previous ‘10-K’:  ‘10-K/A’ on 5/2/22 for 12/31/21   ·   Next & Latest:  ‘10-K/A’ on 5/1/23 for 12/31/22   ·   22 References:   

Find Words in Filings emoji
 		  in    Show  and   ↓Hints

  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

 3/23/23  Falconstor Software Inc.          10-K       12/31/22  110:15M                                    Donnelley … Solutions/FA

Annual Report   —   Form 10-K

Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: 10-K        Annual Report                                       HTML   3.42M 
 2: EX-4        Ex-4.8                                              HTML     44K 
 3: EX-10       Ex-10.11                                            HTML     44K 
 4: EX-23       Ex-23.1                                             HTML     31K 
 5: EX-31       Ex-31.1                                             HTML     37K 
 6: EX-31       Ex-31.2                                             HTML     37K 
 7: EX-32       Ex-32.1                                             HTML     34K 
 8: EX-32       Ex-32.2                                             HTML     34K 
14: R1          Cover                                               HTML     99K 
15: R2          Consolidated Balance Sheets                         HTML    150K 
16: R3          Consolidated Balance Sheets (Parenthetical)         HTML     56K 
17: R4          Condensed Consolidated Statements of Operations     HTML    125K 
18: R5          Consolidated Statements of Comprehensive Loss       HTML     64K 
                (Unaudited)                                                      
19: R6          Consolidated Statements of Stockholders' Deficit    HTML     87K 
20: R7          Consolidated Statements of Cash Flows               HTML    135K 
21: R8          Summary of Significant Accounting Policies          HTML    490K 
22: R9          Property and Equipment                              HTML     41K 
23: R10         Fair Value Measurements                             HTML    156K 
24: R11         Accrued Expenses                                    HTML     57K 
25: R12         Income Taxes                                        HTML    213K 
26: R13         Accumulated Other Comprehensive Loss                HTML    121K 
27: R14         Notes Payable                                       HTML     65K 
28: R15         Series A Redeemable Convertible Preferred Stock     HTML    120K 
29: R16         Stockholders' Equity                                HTML     46K 
30: R17         Share-Based Payment Arrangements                    HTML    177K 
31: R18         Commitments and Contingencies                       HTML     51K 
32: R19         Derivative Financial Instruments                    HTML     40K 
33: R20         Litigation                                          HTML     42K 
34: R21         Restructuring Costs                                 HTML     99K 
35: R22         Employee Benefit Plans                              HTML    126K 
36: R23         Segment Reporting and Concentrations                HTML     87K 
37: R24         Valuation and Qualifying Accounts - Allowance for   HTML     56K 
                Returns and Doubtful Accounts                                    
38: R25         Related Party Transactions                          HTML     39K 
39: R26         Subsequent Events                                   HTML     37K 
40: R27         Summary of Significant Accounting Policies          HTML    535K 
                (Policies)                                                       
41: R28         Summary of Significant Accounting Policies          HTML    398K 
                (Tables)                                                         
42: R29         Fair Value Measurements (Tables)                    HTML    143K 
43: R30         Accrued Expenses (Tables)                           HTML     56K 
44: R31         Income Taxes (Tables)                               HTML    196K 
45: R32         Accumulated Other Comprehensive Loss (Tables)       HTML    119K 
46: R33         Notes Payable (Tables)                              HTML     51K 
47: R34         Series A Redeemable Convertible Preferred Stock     HTML    103K 
                (Tables)                                                         
48: R35         Share-Based Payment Arrangements (Tables)           HTML    171K 
49: R36         Restructuring Costs (Tables)                        HTML     92K 
50: R37         Employee Benefit Plans (Tables)                     HTML    112K 
51: R38         Segment Reporting and Concentrations (Tables)       HTML     80K 
52: R39         Valuation and Qualifying Accounts - Allowance for   HTML     53K 
                Returns and Doubtful Accounts (Tables)                           
53: R40         Summary of Significant Accounting Policies -        HTML    120K 
                Additional Information (Details)                                 
54: R41         Summary of Significant Accounting Policies -        HTML     71K 
                Revision of Previously Issued Financial Statements               
                - Balance Sheet (Details)                                        
55: R42         Summary of Significant Accounting Policies -        HTML    101K 
                Revision of Previously Issued Financial Statements               
                - Statement of Operations (Details)                              
56: R43         Summary of Significant Accounting Policies -        HTML     55K 
                Revision of Previously Issued Financial Statements               
                - Statement of Comprehensive Income (Loss)                       
                (Details)                                                        
57: R44         Summary of Significant Accounting Policies -        HTML     60K 
                Revision of Previously Issued Financial Statements               
                - Statement of Stockholders' Deficit (Details)                   
58: R45         Summary of Significant Accounting Policies -        HTML     59K 
                Revision of Previously Issued Financial Statements               
                - Statement of Cash Flows (Details)                              
59: R46         Summary of Significant Accounting Policies -        HTML     39K 
                Schedule of Changes in Deferred Revenue (Details)                
60: R47         Summary of Significant Accounting Policies -        HTML     39K 
                Summary of ROU Assets and Liabilities (Details)                  
61: R48         Summary of Significant Accounting Policies -        HTML     37K 
                Components of Lease Expense (Details)                            
62: R49         Summary of Significant Accounting Policies -        HTML     41K 
                Summary of Future Minimum Lease Payments of ROU                  
                Assets over Remaining Lease (Details)                            
63: R50         Summary of Significant Accounting Policies -        HTML     44K 
                Schedule of Gross Carrying Amount and Accumulated                
                Amortization of Goodwill and Other Intangible                    
                Assets (Details)                                                 
64: R51         Summary of Significant Accounting Policies -        HTML     38K 
                Software Development Costs Table (Details)                       
65: R52         Summary of Significant Accounting Policies -        HTML     39K 
                Schedule of Anti-dilutive Common Stock Equivalents               
                that were Excluded from Computation of Diluted                   
                Shares Outstanding (Details)                                     
66: R53         Summary of Significant Accounting Policies -        HTML     77K 
                Earnings per Share (Details)                                     
67: R54         Property and Equipment - Additional Information     HTML     43K 
                (Details)                                                        
68: R55         Fair Value Measurements - Additional Information    HTML     39K 
                (Details)                                                        
69: R56         Fair Value Measurements - Schedule of Fair Value    HTML     48K 
                Assets and Liabilities Measured On Recurring Basis               
                (Details)                                                        
70: R57         Fair Value Measurements - Summary of Fair Value     HTML     39K 
                Measurements using Significant Unobservable Inputs               
                (Details)                                                        
71: R58         Accrued Expenses - Schedule of Accrued Expenses     HTML     43K 
                (Details)                                                        
72: R59         Income Taxes - Schedule of Income (Loss) Before     HTML     68K 
                Income Taxes (Details)                                           
73: R60         Income Taxes - Schedule of Deferred Tax Assets and  HTML     76K 
                Liabilities (Details)                                            
74: R61         Income Taxes - Additional Information (Details)     HTML     68K 
75: R62         Income Taxes - Schedule of Effective Tax Rate       HTML     62K 
                Reconcillation (Details)                                         
76: R63         Income Taxes - Schedule of Unrecognized Tax         HTML     40K 
                Benefits (Details)                                               
77: R64         Accumulated Other Comprehensive Loss - Schedule of  HTML     56K 
                Changes in Accumulated Other Comprehensive Loss,                 
                Net of Tax (Details)                                             
78: R65         Notes Payable - Schedule of Notes Payable           HTML     56K 
                (Details)                                                        
79: R66         Notes Payable - Additional Information (Details)    HTML     63K 
80: R67         Series A Redeemable Convertible Preferred Stock -   HTML     70K 
                Additional Information (Details)                                 
81: R68         Series A Redeemable Convertible Preferred Stock -   HTML     42K 
                Schedule of Components of Series A Preferred Stock               
                (Details)                                                        
82: R69         Series A Redeemable Convertible Preferred Stock -   HTML     37K 
                Series A Redeemable Convertible Preferred Stock                  
                (Recognition) (Details))                                         
83: R70         Series A Redeemable Convertible Preferred Stock -   HTML     36K 
                Series A Redeemable Convertible Preferred Stock -                
                Probability and Volatility Assumptions (Details)                 
84: R71         Series A Redeemable Convertible Preferred Stock -   HTML     52K 
                Series A Redeemable Convertible Preferred Stock                  
                Effect on Net Income (Details)                                   
85: R72         Stockholders' Equity - Additional Information       HTML     49K 
                (Details)                                                        
86: R73         Share-Based Payment Arrangements - Additional       HTML     56K 
                Information (Details)                                            
87: R74         Share-Based Payment Arrangements - Summary of       HTML     41K 
                Stock Option plan (Details)                                      
88: R75         Share-Based Payment Arrangements - Schedule of      HTML     41K 
                Equity Awards Outstanding (Details)                              
89: R76         Share-Based Payment Arrangements - Stock Option     HTML     82K 
                Activity (Details)                                               
90: R77         Share-Based Payment Arrangements - Summary of       HTML     43K 
                Share-Based Compensation Expense (Details)                       
91: R78         Share-Based Payment Arrangements - Share-Based      HTML     37K 
                Compensation Expense for Restricted Stock Awards                 
                (Details)                                                        
92: R79         Share-Based Payment Arrangements - Summary of       HTML     41K 
                Restricted Stock Activity (Details)                              
93: R80         Commitments and Contingencies - Additional          HTML     63K 
                Information (Details)                                            
94: R81         Derivative Financial Instruments - Additional       HTML     44K 
                Information (Details)                                            
95: R82         Litigation - Additional Information (Details)       HTML     38K 
96: R83         Restructuring Costs - Additional Information        HTML     49K 
                (Details)                                                        
97: R84         Restructuring Costs - Summary of Restructuring      HTML     51K 
                Liabilities Recorded in Connection with 2017, 2019               
                and 2020 Plans (Details)                                         
98: R85         Employee Benefit Plans - Additional Information     HTML     66K 
                (Details)                                                        
99: R86         Employee Benefit Plans - Pension Information        HTML     63K 
                (Details)                                                        
100: R87         Employee Benefit Plans - Components of Net          HTML     50K  
                Periodic Pension Cost (Details)                                  
101: R88         Employee Benefit Plans - Employee Benefit Plans     HTML     38K  
                Assumptions in Computing Benefit Obligation                      
                (Details)                                                        
102: R89         Segment Reporting and Concentrations - Schedule of  HTML     48K  
                Revenues and Long Lived Assets by Geographical                   
                Areas (Details)                                                  
103: R90         Segment Reporting and Concentrations - Additional   HTML     34K  
                Information (Details)                                            
104: R91         Valuation and Qualifying Accounts - Allowance for   HTML     38K  
                Returns and Doubtful Accounts - Schedule of                      
                Valuation Accounts (Details)                                     
105: R92         Related Party Transactions - Additional             HTML     42K  
                Information (Details)                                            
108: XML         IDEA XML File -- Filing Summary                      XML    207K  
106: XML         XBRL Instance -- falc-20221231_htm                   XML   3.98M  
107: EXCEL       IDEA Workbook of Financial Reports                  XLSX    200K  
13: EX-101.CAL  XBRL Calculations -- falc-20221231_cal               XML    247K 
10: EX-101.DEF  XBRL Definitions -- falc-20221231_def                XML    798K 
 9: EX-101.LAB  XBRL Labels -- falc-20221231_lab                     XML   1.79M 
11: EX-101.PRE  XBRL Presentations -- falc-20221231_pre              XML   1.37M 
12: EX-101.SCH  XBRL Schema -- falc-20221231                         XSD    228K 
109: JSON        XBRL Instance as JSON Data -- MetaLinks              597±   982K  
110: ZIP         XBRL Zipped Folder -- 0000950170-23-009553-xbrl      Zip    479K

‘XML’   —   IDEA XML File — Filing Summary

This Document is an IDEA XML File.

                                                                                                                                                                                
<?xml version="1.0" encoding="windows-1252"?>
<FilingSummary>
<Version> 3.23.1 </Version>
<ProcessingTime/>
<ReportFormat> html </ReportFormat>
<ContextCount> 177 </ContextCount>
<ElementCount> 454 </ElementCount>
<EntityCount> 1 </EntityCount>
<FootnotesReported> false </FootnotesReported>
<SegmentCount> 70 </SegmentCount>
<ScenarioCount> 0 </ScenarioCount>
<TuplesReported> false </TuplesReported>
<UnitCount> 6 </UnitCount>
<MyReports>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R1.htm </HtmlFileName>
<LongName> 100000 - Document - Cover </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/Cover </Role>
<ShortName> Cover </ShortName>
<MenuCategory> Cover </MenuCategory>
<Position> 1 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R2.htm </HtmlFileName>
<LongName> 100010 - Statement - CONSOLIDATED BALANCE SHEETS </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/StatementConsolidatedBalanceSheets </Role>
<ShortName> CONSOLIDATED BALANCE SHEETS </ShortName>
<MenuCategory> Statements </MenuCategory>
<Position> 2 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R3.htm </HtmlFileName>
<LongName> 100040 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical </Role>
<ShortName> CONSOLIDATED BALANCE SHEETS (Parenthetical) </ShortName>
<MenuCategory> Statements </MenuCategory>
<Position> 3 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R4.htm </HtmlFileName>
<LongName> 100050 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/StatementCondensedConsolidatedStatementsOfOperations </Role>
<ShortName> CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS </ShortName>
<MenuCategory> Statements </MenuCategory>
<Position> 4 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R5.htm </HtmlFileName>
<LongName> 100060 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveLossUnaudited </Role>
<ShortName> CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) </ShortName>
<MenuCategory> Statements </MenuCategory>
<Position> 5 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R6.htm </HtmlFileName>
<LongName> 100070 - Statement - CONSOLIDATED STATEMENTS OF STOCKHOLDERS' DEFICIT </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/StatementConsolidatedStatementsOfStockholdersDeficit </Role>
<ShortName> CONSOLIDATED STATEMENTS OF STOCKHOLDERS' DEFICIT </ShortName>
<MenuCategory> Statements </MenuCategory>
<Position> 6 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R7.htm </HtmlFileName>
<LongName> 100080 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows </Role>
<ShortName> CONSOLIDATED STATEMENTS OF CASH FLOWS </ShortName>
<MenuCategory> Statements </MenuCategory>
<Position> 7 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R8.htm </HtmlFileName>
<LongName> 100090 - Disclosure - Summary of Significant Accounting Policies </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/SummaryofSignificantAccountingPolicies </Role>
<ShortName> Summary of Significant Accounting Policies </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 8 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R9.htm </HtmlFileName>
<LongName> 100100 - Disclosure - Property and Equipment </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/PropertyandEquipment </Role>
<ShortName> Property and Equipment </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 9 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R10.htm </HtmlFileName>
<LongName> 100110 - Disclosure - Fair Value Measurements </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/FairValueMeasurements </Role>
<ShortName> Fair Value Measurements </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 10 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R11.htm </HtmlFileName>
<LongName> 100120 - Disclosure - Accrued Expenses </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureAccruedExpenses </Role>
<ShortName> Accrued Expenses </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 11 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R12.htm </HtmlFileName>
<LongName> 100130 - Disclosure - Income Taxes </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/IncomeTaxes </Role>
<ShortName> Income Taxes </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 12 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R13.htm </HtmlFileName>
<LongName> 100140 - Disclosure - Accumulated Other Comprehensive Loss </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/AccumulatedOtherComprehensiveLoss </Role>
<ShortName> Accumulated Other Comprehensive Loss </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 13 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R14.htm </HtmlFileName>
<LongName> 100150 - Disclosure - Notes Payable </LongName>
<ReportType> Notes </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/NotesPayable </Role>
<ShortName> Notes Payable </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 14 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R15.htm </HtmlFileName>
<LongName> 100160 - Disclosure - Series A Redeemable Convertible Preferred Stock </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/SeriesARedeemableConvertiblePreferredStock </Role>
<ShortName> Series A Redeemable Convertible Preferred Stock </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 15 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R16.htm </HtmlFileName>
<LongName> 100170 - Disclosure - Stockholders' Equity </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/StockholdersEquity </Role>
<ShortName> Stockholders' Equity </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 16 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R17.htm </HtmlFileName>
<LongName> 100180 - Disclosure - Share-Based Payment Arrangements </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/ShareBasedPaymentArrangements </Role>
<ShortName> Share-Based Payment Arrangements </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 17 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R18.htm </HtmlFileName>
<LongName> 100190 - Disclosure - Commitments and Contingencies </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/CommitmentsandContingencies </Role>
<ShortName> Commitments and Contingencies </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 18 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R19.htm </HtmlFileName>
<LongName> 100200 - Disclosure - Derivative Financial Instruments </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureDerivativeFinancialInstruments </Role>
<ShortName> Derivative Financial Instruments </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 19 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R20.htm </HtmlFileName>
<LongName> 100210 - Disclosure - Litigation </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/Litigation </Role>
<ShortName> Litigation </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 20 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R21.htm </HtmlFileName>
<LongName> 100220 - Disclosure - Restructuring Costs </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/RestructuringCosts </Role>
<ShortName> Restructuring Costs </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 21 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R22.htm </HtmlFileName>
<LongName> 100230 - Disclosure - Employee Benefit Plans </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureEmployeeBenefitPlans1 </Role>
<ShortName> Employee Benefit Plans </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 22 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R23.htm </HtmlFileName>
<LongName> 100240 - Disclosure - Segment Reporting and Concentrations </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/SegmentReportingandConcentrations </Role>
<ShortName> Segment Reporting and Concentrations </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 23 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R24.htm </HtmlFileName>
<LongName> 100250 - Disclosure - Valuation and Qualifying Accounts - Allowance for Returns and Doubtful Accounts </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureValuationAndQualifyingAccountsAllowanceForReturnsAndDoubtfulAccounts </Role>
<ShortName> Valuation and Qualifying Accounts - Allowance for Returns and Doubtful Accounts </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 24 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R25.htm </HtmlFileName>
<LongName> 100260 - Disclosure - Related Party Transactions </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureRelatedPartyTransactions </Role>
<ShortName> Related Party Transactions </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 25 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R26.htm </HtmlFileName>
<LongName> 100270 - Disclosure - Subsequent Events </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureSubsequentEvents </Role>
<ShortName> Subsequent Events </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 26 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R27.htm </HtmlFileName>
<LongName> 100280 - Disclosure - Summary of Significant Accounting Policies (Policies) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies </Role>
<ShortName> Summary of Significant Accounting Policies (Policies) </ShortName>
<MenuCategory> Policies </MenuCategory>
<ParentRole> http://www.falconstor.com/20221231/taxonomy/role/SummaryofSignificantAccountingPolicies </ParentRole>
<Position> 27 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R28.htm </HtmlFileName>
<LongName> 100290 - Disclosure - Summary of Significant Accounting Policies (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/SummaryofSignificantAccountingPoliciesTables </Role>
<ShortName> Summary of Significant Accounting Policies (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.falconstor.com/20221231/taxonomy/role/SummaryofSignificantAccountingPolicies </ParentRole>
<Position> 28 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R29.htm </HtmlFileName>
<LongName> 100300 - Disclosure - Fair Value Measurements (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/FairValueMeasurementsTables </Role>
<ShortName> Fair Value Measurements (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.falconstor.com/20221231/taxonomy/role/FairValueMeasurements </ParentRole>
<Position> 29 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R30.htm </HtmlFileName>
<LongName> 100310 - Disclosure - Accrued Expenses (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureAccruedExpensesTables </Role>
<ShortName> Accrued Expenses (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.falconstor.com/20221231/taxonomy/role/DisclosureAccruedExpenses </ParentRole>
<Position> 30 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R31.htm </HtmlFileName>
<LongName> 100320 - Disclosure - Income Taxes (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureIncomeTaxesTables </Role>
<ShortName> Income Taxes (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.falconstor.com/20221231/taxonomy/role/IncomeTaxes </ParentRole>
<Position> 31 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R32.htm </HtmlFileName>
<LongName> 100330 - Disclosure - Accumulated Other Comprehensive Loss (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/AccumulatedOtherComprehensiveLossTables </Role>
<ShortName> Accumulated Other Comprehensive Loss (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.falconstor.com/20221231/taxonomy/role/AccumulatedOtherComprehensiveLoss </ParentRole>
<Position> 32 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R33.htm </HtmlFileName>
<LongName> 100340 - Disclosure - Notes Payable (Tables) </LongName>
<ReportType> Notes </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/NotesPayableTables </Role>
<ShortName> Notes Payable (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.falconstor.com/20221231/taxonomy/role/NotesPayable </ParentRole>
<Position> 33 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R34.htm </HtmlFileName>
<LongName> 100350 - Disclosure - Series A Redeemable Convertible Preferred Stock (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/SeriesARedeemableConvertiblePreferredStockTables </Role>
<ShortName> Series A Redeemable Convertible Preferred Stock (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.falconstor.com/20221231/taxonomy/role/SeriesARedeemableConvertiblePreferredStock </ParentRole>
<Position> 34 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R35.htm </HtmlFileName>
<LongName> 100360 - Disclosure - Share-Based Payment Arrangements (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/ShareBasedPaymentArrangementsTables </Role>
<ShortName> Share-Based Payment Arrangements (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.falconstor.com/20221231/taxonomy/role/ShareBasedPaymentArrangements </ParentRole>
<Position> 35 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R36.htm </HtmlFileName>
<LongName> 100370 - Disclosure - Restructuring Costs (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/RestructuringCostsTables </Role>
<ShortName> Restructuring Costs (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.falconstor.com/20221231/taxonomy/role/RestructuringCosts </ParentRole>
<Position> 36 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R37.htm </HtmlFileName>
<LongName> 100380 - Disclosure - Employee Benefit Plans (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureEmployeeBenefitPlansTables </Role>
<ShortName> Employee Benefit Plans (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.falconstor.com/20221231/taxonomy/role/DisclosureEmployeeBenefitPlans1 </ParentRole>
<Position> 37 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R38.htm </HtmlFileName>
<LongName> 100390 - Disclosure - Segment Reporting and Concentrations (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/SegmentReportingandConcentrationsTables </Role>
<ShortName> Segment Reporting and Concentrations (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.falconstor.com/20221231/taxonomy/role/SegmentReportingandConcentrations </ParentRole>
<Position> 38 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R39.htm </HtmlFileName>
<LongName> 100400 - Disclosure - Valuation and Qualifying Accounts - Allowance for Returns and Doubtful Accounts (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureValuationAndQualifyingAccountsAllowanceForReturnsAndDoubtfulAccountsTables </Role>
<ShortName> Valuation and Qualifying Accounts - Allowance for Returns and Doubtful Accounts (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.falconstor.com/20221231/taxonomy/role/DisclosureValuationAndQualifyingAccountsAllowanceForReturnsAndDoubtfulAccounts </ParentRole>
<Position> 39 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R40.htm </HtmlFileName>
<LongName> 100410 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetails </Role>
<ShortName> Summary of Significant Accounting Policies - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 40 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R41.htm </HtmlFileName>
<LongName> 100420 - Disclosure - Summary of Significant Accounting Policies - Revision of Previously Issued Financial Statements - Balance Sheet (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesRevisionOfPreviouslyIssuedFinancialStatementsBalanceSheetDetails </Role>
<ShortName> Summary of Significant Accounting Policies - Revision of Previously Issued Financial Statements - Balance Sheet (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 41 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R42.htm </HtmlFileName>
<LongName> 100430 - Disclosure - Summary of Significant Accounting Policies - Revision of Previously Issued Financial Statements - Statement of Operations (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesRevisionOfPreviouslyIssuedFinancialStatementsStatementOfOperationsDetails </Role>
<ShortName> Summary of Significant Accounting Policies - Revision of Previously Issued Financial Statements - Statement of Operations (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 42 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R43.htm </HtmlFileName>
<LongName> 100440 - Disclosure - Summary of Significant Accounting Policies - Revision of Previously Issued Financial Statements - Statement of Comprehensive Income (Loss) (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesRevisionOfPreviouslyIssuedFinancialStatementsStatementOfComprehensiveIncomeLossDetails </Role>
<ShortName> Summary of Significant Accounting Policies - Revision of Previously Issued Financial Statements - Statement of Comprehensive Income (Loss) (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 43 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R44.htm </HtmlFileName>
<LongName> 100450 - Disclosure - Summary of Significant Accounting Policies - Revision of Previously Issued Financial Statements - Statement of Stockholders' Deficit (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesRevisionOfPreviouslyIssuedFinancialStatementsStatementOfStockholdersDeficitDetails </Role>
<ShortName> Summary of Significant Accounting Policies - Revision of Previously Issued Financial Statements - Statement of Stockholders' Deficit (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 44 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R45.htm </HtmlFileName>
<LongName> 100460 - Disclosure - Summary of Significant Accounting Policies - Revision of Previously Issued Financial Statements - Statement of Cash Flows (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesRevisionOfPreviouslyIssuedFinancialStatementsStatementOfCashFlowsDetails </Role>
<ShortName> Summary of Significant Accounting Policies - Revision of Previously Issued Financial Statements - Statement of Cash Flows (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 45 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R46.htm </HtmlFileName>
<LongName> 100470 - Disclosure - Summary of Significant Accounting Policies - Schedule of Changes in Deferred Revenue (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfChangesInDeferredRevenueDetails </Role>
<ShortName> Summary of Significant Accounting Policies - Schedule of Changes in Deferred Revenue (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 46 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R47.htm </HtmlFileName>
<LongName> 100480 - Disclosure - Summary of Significant Accounting Policies - Summary of ROU Assets and Liabilities (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesSummaryOfRouAssetsAndLiabilitiesDetails </Role>
<ShortName> Summary of Significant Accounting Policies - Summary of ROU Assets and Liabilities (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 47 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R48.htm </HtmlFileName>
<LongName> 100490 - Disclosure - Summary of Significant Accounting Policies - Components of Lease Expense (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/SummaryofSignificantAccountingPoliciesComponentsofLeaseExpenseDetails </Role>
<ShortName> Summary of Significant Accounting Policies - Components of Lease Expense (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 48 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R49.htm </HtmlFileName>
<LongName> 100500 - Disclosure - Summary of Significant Accounting Policies - Summary of Future Minimum Lease Payments of ROU Assets over Remaining Lease (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesSummaryOfFutureMinimumLeasePaymentsOfRouAssetsOverRemainingLeaseDetails </Role>
<ShortName> Summary of Significant Accounting Policies - Summary of Future Minimum Lease Payments of ROU Assets over Remaining Lease (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 49 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R50.htm </HtmlFileName>
<LongName> 100510 - Disclosure - Summary of Significant Accounting Policies - Schedule of Gross Carrying Amount and Accumulated Amortization of Goodwill and Other Intangible Assets (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfGrossCarryingAmountAndAccumulatedAmortizationOfGoodwillAndOtherIntangibleAssetsD </Role>
<ShortName> Summary of Significant Accounting Policies - Schedule of Gross Carrying Amount and Accumulated Amortization of Goodwill and Other Intangible Assets (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 50 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R51.htm </HtmlFileName>
<LongName> 100520 - Disclosure - Summary of Significant Accounting Policies - Software Development Costs Table (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesSoftwareDevelopmentCostsTableDetails </Role>
<ShortName> Summary of Significant Accounting Policies - Software Development Costs Table (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 51 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R52.htm </HtmlFileName>
<LongName> 100530 - Disclosure - Summary of Significant Accounting Policies - Schedule of Anti-dilutive Common Stock Equivalents that were Excluded from Computation of Diluted Shares Outstanding (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfAntidilutiveCommonStockEquivalentsThatWereExcludedFromComputationOfDilutedShares </Role>
<ShortName> Summary of Significant Accounting Policies - Schedule of Anti-dilutive Common Stock Equivalents that were Excluded from Computation of Diluted Shares Outstanding (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 52 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R53.htm </HtmlFileName>
<LongName> 100540 - Disclosure - Summary of Significant Accounting Policies - Earnings per Share (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesEarningsPerShareDetails </Role>
<ShortName> Summary of Significant Accounting Policies - Earnings per Share (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 53 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R54.htm </HtmlFileName>
<LongName> 100550 - Disclosure - Property and Equipment - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosurePropertyAndEquipmentAdditionalInformationDetails </Role>
<ShortName> Property and Equipment - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 54 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R55.htm </HtmlFileName>
<LongName> 100560 - Disclosure - Fair Value Measurements - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetails </Role>
<ShortName> Fair Value Measurements - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 55 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R56.htm </HtmlFileName>
<LongName> 100570 - Disclosure - Fair Value Measurements - Schedule of Fair Value Assets and Liabilities Measured On Recurring Basis (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisDetails </Role>
<ShortName> Fair Value Measurements - Schedule of Fair Value Assets and Liabilities Measured On Recurring Basis (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 56 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R57.htm </HtmlFileName>
<LongName> 100580 - Disclosure - Fair Value Measurements - Summary of Fair Value Measurements using Significant Unobservable Inputs (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFairValueMeasurementsUsingSignificantUnobservableInputsDetails </Role>
<ShortName> Fair Value Measurements - Summary of Fair Value Measurements using Significant Unobservable Inputs (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 57 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R58.htm </HtmlFileName>
<LongName> 100590 - Disclosure - Accrued Expenses - Schedule of Accrued Expenses (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureAccruedExpensesScheduleOfAccruedExpensesDetails </Role>
<ShortName> Accrued Expenses - Schedule of Accrued Expenses (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 58 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R59.htm </HtmlFileName>
<LongName> 100600 - Disclosure - Income Taxes - Schedule of Income (Loss) Before Income Taxes (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureIncomeTaxesScheduleOfIncomeLossBeforeIncomeTaxesDetails </Role>
<ShortName> Income Taxes - Schedule of Income (Loss) Before Income Taxes (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 59 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R60.htm </HtmlFileName>
<LongName> 100610 - Disclosure - Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureIncomeTaxesScheduleOfDeferredTaxAssetsAndLiabilitiesDetails </Role>
<ShortName> Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 60 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R61.htm </HtmlFileName>
<LongName> 100620 - Disclosure - Income Taxes - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails </Role>
<ShortName> Income Taxes - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 61 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R62.htm </HtmlFileName>
<LongName> 100630 - Disclosure - Income Taxes - Schedule of Effective Tax Rate Reconcillation (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureIncomeTaxesScheduleOfEffectiveTaxRateReconcillationDetails </Role>
<ShortName> Income Taxes - Schedule of Effective Tax Rate Reconcillation (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 62 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R63.htm </HtmlFileName>
<LongName> 100640 - Disclosure - Income Taxes - Schedule of Unrecognized Tax Benefits (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureIncomeTaxesScheduleOfUnrecognizedTaxBenefitsDetails </Role>
<ShortName> Income Taxes - Schedule of Unrecognized Tax Benefits (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 63 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R64.htm </HtmlFileName>
<LongName> 100650 - Disclosure - Accumulated Other Comprehensive Loss - Schedule of Changes in Accumulated Other Comprehensive Loss, Net of Tax (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureAccumulatedOtherComprehensiveLossScheduleOfChangesInAccumulatedOtherComprehensiveLossNetOfTaxDetails </Role>
<ShortName> Accumulated Other Comprehensive Loss - Schedule of Changes in Accumulated Other Comprehensive Loss, Net of Tax (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 64 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R65.htm </HtmlFileName>
<LongName> 100660 - Disclosure - Notes Payable - Schedule of Notes Payable (Details) </LongName>
<ReportType> Notes </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureNotesPayableScheduleOfNotesPayableDetails </Role>
<ShortName> Notes Payable - Schedule of Notes Payable (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 65 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R66.htm </HtmlFileName>
<LongName> 100670 - Disclosure - Notes Payable - Additional Information (Details) </LongName>
<ReportType> Notes </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureNotesPayableAdditionalInformationDetails </Role>
<ShortName> Notes Payable - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 66 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R67.htm </HtmlFileName>
<LongName> 100680 - Disclosure - Series A Redeemable Convertible Preferred Stock - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureSeriesARedeemableConvertiblePreferredStockAdditionalInformationDetails </Role>
<ShortName> Series A Redeemable Convertible Preferred Stock - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 67 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R68.htm </HtmlFileName>
<LongName> 100690 - Disclosure - Series A Redeemable Convertible Preferred Stock - Schedule of Components of Series A Preferred Stock (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureSeriesARedeemableConvertiblePreferredStockScheduleOfComponentsOfSeriesAPreferredStockDetails </Role>
<ShortName> Series A Redeemable Convertible Preferred Stock - Schedule of Components of Series A Preferred Stock (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 68 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R69.htm </HtmlFileName>
<LongName> 100700 - Disclosure - Series A Redeemable Convertible Preferred Stock - Series A Redeemable Convertible Preferred Stock (Recognition) (Details)) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureSeriesARedeemableConvertiblePreferredStockSeriesARedeemableConvertiblePreferredStockRecognitionDetails </Role>
<ShortName> Series A Redeemable Convertible Preferred Stock - Series A Redeemable Convertible Preferred Stock (Recognition) (Details)) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 69 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R70.htm </HtmlFileName>
<LongName> 100710 - Disclosure - Series A Redeemable Convertible Preferred Stock - Series A Redeemable Convertible Preferred Stock - Probability and Volatility Assumptions (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureSeriesARedeemableConvertiblePreferredStockSeriesARedeemableConvertiblePreferredStockProbabilityAndVolatilityAssumptionsDetails </Role>
<ShortName> Series A Redeemable Convertible Preferred Stock - Series A Redeemable Convertible Preferred Stock - Probability and Volatility Assumptions (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 70 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R71.htm </HtmlFileName>
<LongName> 100720 - Disclosure - Series A Redeemable Convertible Preferred Stock - Series A Redeemable Convertible Preferred Stock Effect on Net Income (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureSeriesARedeemableConvertiblePreferredStockSeriesARedeemableConvertiblePreferredStockEffectOnNetIncomeDetails </Role>
<ShortName> Series A Redeemable Convertible Preferred Stock - Series A Redeemable Convertible Preferred Stock Effect on Net Income (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 71 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R72.htm </HtmlFileName>
<LongName> 100730 - Disclosure - Stockholders' Equity - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureStockholdersEquityAdditionalInformationDetails </Role>
<ShortName> Stockholders' Equity - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 72 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R73.htm </HtmlFileName>
<LongName> 100740 - Disclosure - Share-Based Payment Arrangements - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureSharebasedPaymentArrangementsAdditionalInformationDetails </Role>
<ShortName> Share-Based Payment Arrangements - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 73 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R74.htm </HtmlFileName>
<LongName> 100750 - Disclosure - Share-Based Payment Arrangements - Summary of Stock Option plan (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureSharebasedPaymentArrangementsSummaryOfStockOptionPlanDetails </Role>
<ShortName> Share-Based Payment Arrangements - Summary of Stock Option plan (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 74 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R75.htm </HtmlFileName>
<LongName> 100760 - Disclosure - Share-Based Payment Arrangements - Schedule of Equity Awards Outstanding (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureSharebasedPaymentArrangementsScheduleOfEquityAwardsOutstandingDetails </Role>
<ShortName> Share-Based Payment Arrangements - Schedule of Equity Awards Outstanding (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 75 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R76.htm </HtmlFileName>
<LongName> 100770 - Disclosure - Share-Based Payment Arrangements - Stock Option Activity (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureSharebasedPaymentArrangementsStockOptionActivityDetails </Role>
<ShortName> Share-Based Payment Arrangements - Stock Option Activity (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 76 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R77.htm </HtmlFileName>
<LongName> 100780 - Disclosure - Share-Based Payment Arrangements - Summary of Share-Based Compensation Expense (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureSharebasedPaymentArrangementsSummaryOfSharebasedCompensationExpenseDetails </Role>
<ShortName> Share-Based Payment Arrangements - Summary of Share-Based Compensation Expense (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 77 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R78.htm </HtmlFileName>
<LongName> 100790 - Disclosure - Share-Based Payment Arrangements - Share-Based Compensation Expense for Restricted Stock Awards (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureSharebasedPaymentArrangementsSharebasedCompensationExpenseForRestrictedStockAwardsDetails </Role>
<ShortName> Share-Based Payment Arrangements - Share-Based Compensation Expense for Restricted Stock Awards (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 78 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R79.htm </HtmlFileName>
<LongName> 100800 - Disclosure - Share-Based Payment Arrangements - Summary of Restricted Stock Activity (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureSharebasedPaymentArrangementsSummaryOfRestrictedStockActivityDetails </Role>
<ShortName> Share-Based Payment Arrangements - Summary of Restricted Stock Activity (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 79 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R80.htm </HtmlFileName>
<LongName> 100810 - Disclosure - Commitments and Contingencies - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureCommitmentsAndContingenciesAdditionalInformationDetails </Role>
<ShortName> Commitments and Contingencies - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 80 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R81.htm </HtmlFileName>
<LongName> 100820 - Disclosure - Derivative Financial Instruments - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureDerivativeFinancialInstrumentsAdditionalInformationDetails </Role>
<ShortName> Derivative Financial Instruments - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 81 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R82.htm </HtmlFileName>
<LongName> 100830 - Disclosure - Litigation - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureLitigationAdditionalInformationDetails </Role>
<ShortName> Litigation - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 82 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R83.htm </HtmlFileName>
<LongName> 100840 - Disclosure - Restructuring Costs - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureRestructuringCostsAdditionalInformationDetails </Role>
<ShortName> Restructuring Costs - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 83 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R84.htm </HtmlFileName>
<LongName> 100850 - Disclosure - Restructuring Costs - Summary of Restructuring Liabilities Recorded in Connection with 2017, 2019 and 2020 Plans (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureRestructuringCostsSummaryOfRestructuringLiabilitiesRecordedInConnectionWith20172019And2020PlansDetails </Role>
<ShortName> Restructuring Costs - Summary of Restructuring Liabilities Recorded in Connection with 2017, 2019 and 2020 Plans (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 84 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R85.htm </HtmlFileName>
<LongName> 100860 - Disclosure - Employee Benefit Plans - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails </Role>
<ShortName> Employee Benefit Plans - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 85 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R86.htm </HtmlFileName>
<LongName> 100870 - Disclosure - Employee Benefit Plans - Pension Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureEmployeeBenefitPlansPensionInformationDetails </Role>
<ShortName> Employee Benefit Plans - Pension Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 86 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R87.htm </HtmlFileName>
<LongName> 100880 - Disclosure - Employee Benefit Plans - Components of Net Periodic Pension Cost (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureEmployeeBenefitPlansComponentsOfNetPeriodicPensionCostDetails </Role>
<ShortName> Employee Benefit Plans - Components of Net Periodic Pension Cost (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 87 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R88.htm </HtmlFileName>
<LongName> 100890 - Disclosure - Employee Benefit Plans - Employee Benefit Plans Assumptions in Computing Benefit Obligation (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureEmployeeBenefitPlansEmployeeBenefitPlansAssumptionsInComputingBenefitObligationDetails </Role>
<ShortName> Employee Benefit Plans - Employee Benefit Plans Assumptions in Computing Benefit Obligation (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 88 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R89.htm </HtmlFileName>
<LongName> 100900 - Disclosure - Segment Reporting and Concentrations - Schedule of Revenues and Long Lived Assets by Geographical Areas (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureSegmentReportingAndConcentrationsScheduleOfRevenuesAndLongLivedAssetsByGeographicalAreasDetails </Role>
<ShortName> Segment Reporting and Concentrations - Schedule of Revenues and Long Lived Assets by Geographical Areas (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 89 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R90.htm </HtmlFileName>
<LongName> 100910 - Disclosure - Segment Reporting and Concentrations - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureSegmentReportingAndConcentrationsAdditionalInformationDetails </Role>
<ShortName> Segment Reporting and Concentrations - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 90 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R91.htm </HtmlFileName>
<LongName> 100920 - Disclosure - Valuation and Qualifying Accounts - Allowance for Returns and Doubtful Accounts - Schedule of Valuation Accounts (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureValuationAndQualifyingAccountsAllowanceForReturnsAndDoubtfulAccountsScheduleOfValuationAccountsDetails </Role>
<ShortName> Valuation and Qualifying Accounts - Allowance for Returns and Doubtful Accounts - Schedule of Valuation Accounts (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 91 </Position>
</Report>
<Report instance="falc-20221231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R92.htm </HtmlFileName>
<LongName> 100930 - Disclosure - Related Party Transactions - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.falconstor.com/20221231/taxonomy/role/DisclosureRelatedPartyTransactionsAdditionalInformationDetails </Role>
<ShortName> Related Party Transactions - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 92 </Position>
</Report>
<Report>
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<LongName> All Reports </LongName>
<ReportType> Book </ReportType>
<ShortName> All Reports </ShortName>
</Report>
</MyReports>
<Logs>
<Log type="Warning"> [ix-0514-Hidden-Fact-Eligible-For-Transform] WARN: 1 fact(s) appearing in ix:hidden were eligible for transformation: falc:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpectedToVestOutstandingWeightedAverageRemainingContractualTerm - falc-20221231.htm 8 </Log>
</Logs>
<InputFiles>
<File doctype="10-K" original="falc-20221231.htm"> falc-20221231.htm </File>
<File> falc-20221231.xsd </File>
<File> falc-20221231_cal.xml </File>
<File> falc-20221231_def.xml </File>
<File> falc-20221231_lab.xml </File>
<File> falc-20221231_pre.xml </File>
<File> falc-ex10_11.htm </File>
<File> falc-ex23_1.htm </File>
<File> falc-ex31_1.htm </File>
<File> falc-ex31_2.htm </File>
<File> falc-ex32_1.htm </File>
<File> falc-ex32_2.htm </File>
<File> falc-ex4_8.htm </File>
</InputFiles>
<SupplementalFiles/>
<BaseTaxonomies>
<BaseTaxonomy items="1"> http://fasb.org/srt/2022 </BaseTaxonomy>
<BaseTaxonomy items="892"> http://fasb.org/us-gaap/2022 </BaseTaxonomy>
<BaseTaxonomy items="37"> http://xbrl.sec.gov/dei/2022 </BaseTaxonomy>
</BaseTaxonomies>
<HasPresentationLinkbase> true </HasPresentationLinkbase>
<HasCalculationLinkbase> true </HasCalculationLinkbase>
</FilingSummary>

1 Subsequent Filing that References this Filing

  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

 5/10/23  Falconstor Software Inc.          10-Q        3/31/23   86:8.7M                                   Donnelley … Solutions/FA

21 Previous Filings that this Filing References

  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

11/09/22  Falconstor Software Inc.          10-Q        9/30/22   93:12M                                    Donnelley … Solutions/FA
 2/17/22  Falconstor Software Inc.          8-K:5,9     2/11/22   11:259K                                   E-Data Systems, Inc./FA
 6/28/21  Falconstor Software Inc.          8-K:5,9     6/24/21    2:40K                                    Olshan Frome Wolosky LLP
 6/01/21  Falconstor Software Inc.          DEF 14A     6/24/21    1:649K                                   E-Data Systems, Inc./FA
 5/07/20  Falconstor Software Inc.          10-Q        3/31/20   86:5.7M                                   Workiva Inc Wde… FA01/FA
 3/19/20  Falconstor Software Inc.          10-K       12/31/19  113:9.9M                                   Workiva Inc Wde… FA01/FA
 1/03/20  Falconstor Software Inc.          8-K:1,2,9  12/27/19    2:591K                                   Olshan Frome Wolosky LLP
 8/14/19  Falconstor Software Inc.          10-Q        6/30/19   83:6.5M                                   Workiva Inc Wde… FA01/FA
 6/25/19  Falconstor Software Inc.          8-K:5,9     6/20/19    2:71K                                    Olshan Frome Wolosky LLP
10/11/18  Falconstor Software Inc.          8-K:1,2,3,910/09/18    3:141K                                   Olshan Frome Wolosky LLP
 6/25/18  Falconstor Software Inc.          8-K:3,5,8,9 6/22/18    3:206K                                   Olshan Frome Wolosky LLP
 6/05/18  Falconstor Software Inc.          DEF 14A     6/22/18    1:1M                                     Olshan Frome Wolosky LLP
 2/26/18  Falconstor Software Inc.          8-K:1,2,8,9 2/23/18    5:698K                                   E-Data Systems, Inc./FA
 8/17/17  Falconstor Software Inc.          8-K:5,7,9   8/14/17    6:316K                                   E-Data Systems, Inc./FA
 3/18/16  Falconstor Software Inc.          DEF 14A     3/18/16    1:1M
 4/07/14  Falconstor Software Inc.          8-K:5,9     4/07/14    4:300K                                   Olshan Frome Wolosky LLP
 9/17/13  Falconstor Software Inc.          8-K:1,3,5,9 9/16/13    4:849K                                   Olshan Frome Wolosky LLP
 3/14/11  Falconstor Software Inc.          10-K       12/31/10    8:2.3M                                   Olshan Frome Wolosky LLP
 5/10/07  Falconstor Software Inc.          10-Q        3/31/07    7:173K                                   Olshan Frome Wolosky LLP
 3/27/02  Falconstor Software Inc.          10-K       12/31/01    9:446K                                   Olshan Frome Wolosky LLP
 8/11/00  Falconstor Software Inc.          10-Q        6/30/00    5:157K                                   Dr EDGAR & Consulting/FA
↑Top
Filing Submission 0000950170-23-009553   –   Alternative Formats (Word / Rich Text, HTML, Plain Text, et al.)
Copyright © 2024 Fran Finnegan & Company LLC – All Rights Reserved.
About — Privacy — Redactions — Help — Tue., May 14, 6:20:25.3pm ET