| | | | | | | | | | | | | | | | | | | | | |
<?xml version="1.0" encoding="windows-1252"?> |
<FilingSummary> |
| <Version> 3.22.2 </Version> |
| <ProcessingTime/> |
| <ReportFormat> html </ReportFormat> |
| <ContextCount> 111 </ContextCount> |
| <ElementCount> 199 </ElementCount> |
| <EntityCount> 1 </EntityCount> |
| <FootnotesReported> false </FootnotesReported> |
| <SegmentCount> 25 </SegmentCount> |
| <ScenarioCount> 0 </ScenarioCount> |
| <TuplesReported> false </TuplesReported> |
| <UnitCount> 4 </UnitCount> |
| <MyReports> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R1.htm </HtmlFileName> |
| | | <LongName> 00090 - Document - Document and Entity Information </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DocumentDocumentAndEntityInformation </Role> |
| | | <ShortName> Document and Entity Information </ShortName> |
| | | <MenuCategory> Cover </MenuCategory> |
| | | <Position> 1 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R2.htm </HtmlFileName> |
| | | <LongName> 00100 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/StatementCondensedConsolidatedBalanceSheets </Role> |
| | | <ShortName> CONDENSED CONSOLIDATED BALANCE SHEETS </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 2 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R3.htm </HtmlFileName> |
| | | <LongName> 00105 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/StatementCondensedConsolidatedBalanceSheetsParenthetical </Role> |
| | | <ShortName> CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 3 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R4.htm </HtmlFileName> |
| | | <LongName> 00200 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/StatementCondensedConsolidatedStatementsOfOperationsAndComprehensiveLoss </Role> |
| | | <ShortName> CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 4 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R5.htm </HtmlFileName> |
| | | <LongName> 00300 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOW </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/StatementCondensedConsolidatedStatementsOfCashFlow </Role> |
| | | <ShortName> CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOW </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 5 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R6.htm </HtmlFileName> |
| | | <LongName> 10101 - Disclosure - Basis of Presentation </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureBasisOfPresentation </Role> |
| | | <ShortName> Basis of Presentation </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 6 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R7.htm </HtmlFileName> |
| | | <LongName> 10201 - Disclosure - Significant Accounting Policies </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureSignificantAccountingPolicies </Role> |
| | | <ShortName> Significant Accounting Policies </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 7 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R8.htm </HtmlFileName> |
| | | <LongName> 10301 - Disclosure - Fair Value Measurements </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureFairValueMeasurements </Role> |
| | | <ShortName> Fair Value Measurements </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 8 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R9.htm </HtmlFileName> |
| | | <LongName> 10401 - Disclosure - Marketable Securities </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureMarketableSecurities </Role> |
| | | <ShortName> Marketable Securities </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 9 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R10.htm </HtmlFileName> |
| | | <LongName> 10501 - Disclosure - Intangible Assets </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureIntangibleAssets </Role> |
| | | <ShortName> Intangible Assets </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 10 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R11.htm </HtmlFileName> |
| | | <LongName> 10601 - Disclosure - Other Long-Term Liabilities </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureOtherLongTermLiabilities </Role> |
| | | <ShortName> Other Long-Term Liabilities </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 11 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R12.htm </HtmlFileName> |
| | | <LongName> 10701 - Disclosure - Stockholders' Equity </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureStockholdersEquity </Role> |
| | | <ShortName> Stockholders' Equity </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 12 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R13.htm </HtmlFileName> |
| | | <LongName> 10801 - Disclosure - Stock-Based Compensation </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureStockBasedCompensation </Role> |
| | | <ShortName> Stock-Based Compensation </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 13 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R14.htm </HtmlFileName> |
| | | <LongName> 10901 - Disclosure - Accumulated Other Comprehensive Income </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureAccumulatedOtherComprehensiveIncome </Role> |
| | | <ShortName> Accumulated Other Comprehensive Income </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 14 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R15.htm </HtmlFileName> |
| | | <LongName> 11001 - Disclosure - Revenue </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureRevenue </Role> |
| | | <ShortName> Revenue </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 15 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R16.htm </HtmlFileName> |
| | | <LongName> 11101 - Disclosure - Income Taxes </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureIncomeTaxes </Role> |
| | | <ShortName> Income Taxes </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 16 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R17.htm </HtmlFileName> |
| | | <LongName> 11201 - Disclosure - Net Loss Per Share </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureNetLossPerShare </Role> |
| | | <ShortName> Net Loss Per Share </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 17 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R18.htm </HtmlFileName> |
| | | <LongName> 11301 - Disclosure - Kolltan Acquisition </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureKolltanAcquisition </Role> |
| | | <ShortName> Kolltan Acquisition </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 18 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R19.htm </HtmlFileName> |
| | | <LongName> 20202 - Disclosure - Significant Accounting Policies (Policies) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureSignificantAccountingPoliciesPolicies </Role> |
| | | <ShortName> Significant Accounting Policies (Policies) </ShortName> |
| | | <MenuCategory> Policies </MenuCategory> |
| | | <ParentRole> http://www.celldextherapeutics.com/role/DisclosureSignificantAccountingPolicies </ParentRole> |
| | | <Position> 19 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R20.htm </HtmlFileName> |
| | | <LongName> 30303 - Disclosure - Fair Value Measurements (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureFairValueMeasurementsTables </Role> |
| | | <ShortName> Fair Value Measurements (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.celldextherapeutics.com/role/DisclosureFairValueMeasurements </ParentRole> |
| | | <Position> 20 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R21.htm </HtmlFileName> |
| | | <LongName> 30403 - Disclosure - Marketable Securities (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureMarketableSecuritiesTables </Role> |
| | | <ShortName> Marketable Securities (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.celldextherapeutics.com/role/DisclosureMarketableSecurities </ParentRole> |
| | | <Position> 21 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R22.htm </HtmlFileName> |
| | | <LongName> 30603 - Disclosure - Other Long-Term Liabilities (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureOtherLongTermLiabilitiesTables </Role> |
| | | <ShortName> Other Long-Term Liabilities (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.celldextherapeutics.com/role/DisclosureOtherLongTermLiabilities </ParentRole> |
| | | <Position> 22 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R23.htm </HtmlFileName> |
| | | <LongName> 30703 - Disclosure - Stockholders' Equity (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureStockholdersEquityTables </Role> |
| | | <ShortName> Stockholders' Equity (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.celldextherapeutics.com/role/DisclosureStockholdersEquity </ParentRole> |
| | | <Position> 23 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R24.htm </HtmlFileName> |
| | | <LongName> 30803 - Disclosure - Stock-Based Compensation (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureStockBasedCompensationTables </Role> |
| | | <ShortName> Stock-Based Compensation (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.celldextherapeutics.com/role/DisclosureStockBasedCompensation </ParentRole> |
| | | <Position> 24 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R25.htm </HtmlFileName> |
| | | <LongName> 30903 - Disclosure - Accumulated Other Comprehensive Income (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureAccumulatedOtherComprehensiveIncomeTables </Role> |
| | | <ShortName> Accumulated Other Comprehensive Income (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.celldextherapeutics.com/role/DisclosureAccumulatedOtherComprehensiveIncome </ParentRole> |
| | | <Position> 25 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R26.htm </HtmlFileName> |
| | | <LongName> 31203 - Disclosure - Net Loss Per Share (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureNetLossPerShareTables </Role> |
| | | <ShortName> Net Loss Per Share (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.celldextherapeutics.com/role/DisclosureNetLossPerShare </ParentRole> |
| | | <Position> 26 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R27.htm </HtmlFileName> |
| | | <LongName> 40101 - Disclosure - Basis of Presentation (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureBasisOfPresentationDetails </Role> |
| | | <ShortName> Basis of Presentation (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.celldextherapeutics.com/role/DisclosureBasisOfPresentation </ParentRole> |
| | | <Position> 27 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R28.htm </HtmlFileName> |
| | | <LongName> 40301 - Disclosure - Fair Value Measurements (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureFairValueMeasurementsDetails </Role> |
| | | <ShortName> Fair Value Measurements (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.celldextherapeutics.com/role/DisclosureFairValueMeasurementsTables </ParentRole> |
| | | <Position> 28 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R29.htm </HtmlFileName> |
| | | <LongName> 40302 - Disclosure - Fair Value Measurements - Contingent Consideration Liabilities (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureFairValueMeasurementsContingentConsiderationLiabilitiesDetails </Role> |
| | | <ShortName> Fair Value Measurements - Contingent Consideration Liabilities (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 29 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R30.htm </HtmlFileName> |
| | | <LongName> 40303 - Disclosure - Fair Value Measurements - Additional information (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureFairValueMeasurementsAdditionalInformationDetails </Role> |
| | | <ShortName> Fair Value Measurements - Additional information (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 30 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R31.htm </HtmlFileName> |
| | | <LongName> 40401 - Disclosure - Marketable Securities (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureMarketableSecuritiesDetails </Role> |
| | | <ShortName> Marketable Securities (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.celldextherapeutics.com/role/DisclosureMarketableSecuritiesTables </ParentRole> |
| | | <Position> 31 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R32.htm </HtmlFileName> |
| | | <LongName> 40402 - Disclosure - Marketable Securities - Additional Information (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureMarketableSecuritiesAdditionalInformationDetails </Role> |
| | | <ShortName> Marketable Securities - Additional Information (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 32 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R33.htm </HtmlFileName> |
| | | <LongName> 40501 - Disclosure - Intangible Assets (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureIntangibleAssetsDetails </Role> |
| | | <ShortName> Intangible Assets (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.celldextherapeutics.com/role/DisclosureIntangibleAssets </ParentRole> |
| | | <Position> 33 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R34.htm </HtmlFileName> |
| | | <LongName> 40601 - Disclosure - Other Long-Term Liabilities (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureOtherLongTermLiabilitiesDetails </Role> |
| | | <ShortName> Other Long-Term Liabilities (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.celldextherapeutics.com/role/DisclosureOtherLongTermLiabilitiesTables </ParentRole> |
| | | <Position> 34 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R35.htm </HtmlFileName> |
| | | <LongName> 40602 - Disclosure - Other Long-Term Liabilities- New Jersey tax benefits (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureOtherLongTermLiabilitiesNewJerseyTaxBenefitsDetails </Role> |
| | | <ShortName> Other Long-Term Liabilities- New Jersey tax benefits (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 35 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R36.htm </HtmlFileName> |
| | | <LongName> 40701 - Disclosure - Stockholders' Equity (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureStockholdersEquityDetails </Role> |
| | | <ShortName> Stockholders' Equity (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.celldextherapeutics.com/role/DisclosureStockholdersEquityTables </ParentRole> |
| | | <Position> 36 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R37.htm </HtmlFileName> |
| | | <LongName> 40801 - Disclosure - Stock-Based Compensation - Stock Option Activity (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureStockBasedCompensationStockOptionActivityDetails </Role> |
| | | <ShortName> Stock-Based Compensation - Stock Option Activity (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 37 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R38.htm </HtmlFileName> |
| | | <LongName> 40802 - Disclosure - Stock-Based Compensation - Employee Stock Option and Incentive Plan Activity Additional Information (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureStockBasedCompensationEmployeeStockOptionAndIncentivePlanActivityAdditionalInformationDetails </Role> |
| | | <ShortName> Stock-Based Compensation - Employee Stock Option and Incentive Plan Activity Additional Information (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 38 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R39.htm </HtmlFileName> |
| | | <LongName> 40803 - Disclosure - Stock-Based Compensation - Expenses (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureStockBasedCompensationExpensesDetails </Role> |
| | | <ShortName> Stock-Based Compensation - Expenses (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 39 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R40.htm </HtmlFileName> |
| | | <LongName> 40804 - Disclosure - Stock-Based Compensation - Valuation (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureStockBasedCompensationValuationDetails </Role> |
| | | <ShortName> Stock-Based Compensation - Valuation (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 40 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R41.htm </HtmlFileName> |
| | | <LongName> 40901 - Disclosure - Accumulated Other Comprehensive Income (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureAccumulatedOtherComprehensiveIncomeDetails </Role> |
| | | <ShortName> Accumulated Other Comprehensive Income (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.celldextherapeutics.com/role/DisclosureAccumulatedOtherComprehensiveIncomeTables </ParentRole> |
| | | <Position> 41 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R42.htm </HtmlFileName> |
| | | <LongName> 41001 - Disclosure - Revenue (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureRevenueDetails </Role> |
| | | <ShortName> Revenue (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.celldextherapeutics.com/role/DisclosureRevenue </ParentRole> |
| | | <Position> 42 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R43.htm </HtmlFileName> |
| | | <LongName> 41101 - Disclosure - Income Taxes (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureIncomeTaxesDetails </Role> |
| | | <ShortName> Income Taxes (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.celldextherapeutics.com/role/DisclosureIncomeTaxes </ParentRole> |
| | | <Position> 43 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R44.htm </HtmlFileName> |
| | | <LongName> 41201 - Disclosure - Net Loss Per Share (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureNetLossPerShareDetails </Role> |
| | | <ShortName> Net Loss Per Share (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.celldextherapeutics.com/role/DisclosureNetLossPerShareTables </ParentRole> |
| | | <Position> 44 </Position> |
| | | </Report> |
| | <Report instance="cldx-20220630x10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R45.htm </HtmlFileName> |
| | | <LongName> 41301 - Disclosure - Kolltan Acquisition (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.celldextherapeutics.com/role/DisclosureKolltanAcquisitionDetails </Role> |
| | | <ShortName> Kolltan Acquisition (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.celldextherapeutics.com/role/DisclosureKolltanAcquisition </ParentRole> |
| | | <Position> 45 </Position> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <LongName> All Reports </LongName> |
| | | <ReportType> Book </ReportType> |
| | | <ShortName> All Reports </ShortName> |
| | | </Report> |
| | </MyReports> |
| <InputFiles> |
| | <File doctype="10-Q" original="cldx-20220630x10q.htm"> cldx-20220630x10q.htm </File> |
| | <File> cldx-20220630.xsd </File> |
| | <File> cldx-20220630_cal.xml </File> |
| | <File> cldx-20220630_def.xml </File> |
| | <File> cldx-20220630_lab.xml </File> |
| | <File> cldx-20220630_pre.xml </File> |
| | <File> cldx-20220630xex10d3.htm </File> |
| | <File> cldx-20220630xex31d1.htm </File> |
| | <File> cldx-20220630xex31d2.htm </File> |
| | <File> cldx-20220630xex32d1.htm </File> |
| | </InputFiles> |
| <SupplementalFiles/> |
| <BaseTaxonomies> |
| | <BaseTaxonomy items="456"> http://fasb.org/us-gaap/2022 </BaseTaxonomy> |
| | <BaseTaxonomy items="31"> http://xbrl.sec.gov/dei/2022 </BaseTaxonomy> |
| | </BaseTaxonomies> |
| <HasPresentationLinkbase> true </HasPresentationLinkbase> |
| <HasCalculationLinkbase> true </HasCalculationLinkbase> |
| </FilingSummary> |