| | | | | | | | | | | | | | | | | | | | | |
<?xml version="1.0" encoding="windows-1252"?> |
<FilingSummary> |
| <Version> 3.24.1 </Version> |
| <ProcessingTime/> |
| <ReportFormat> html </ReportFormat> |
| <ContextCount> 249 </ContextCount> |
| <ElementCount> 382 </ElementCount> |
| <EntityCount> 1 </EntityCount> |
| <FootnotesReported> false </FootnotesReported> |
| <SegmentCount> 81 </SegmentCount> |
| <ScenarioCount> 0 </ScenarioCount> |
| <TuplesReported> false </TuplesReported> |
| <UnitCount> 6 </UnitCount> |
| <MyReports> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R1.htm </HtmlFileName> |
| | | <LongName> 000 - Document - Document And Entity Information </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-document-and-entity-information </Role> |
| | | <ShortName> Document And Entity Information </ShortName> |
| | | <MenuCategory> Cover </MenuCategory> |
| | | <Position> 1 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R2.htm </HtmlFileName> |
| | | <LongName> 001 - Statement - Consolidated Balance Sheets </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-consolidated-balance-sheets </Role> |
| | | <ShortName> Consolidated Balance Sheets </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 2 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R3.htm </HtmlFileName> |
| | | <LongName> 002 - Statement - Consolidated Balance Sheets (Parentheticals) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-consolidated-balance-sheets-parentheticals </Role> |
| | | <ShortName> Consolidated Balance Sheets (Parentheticals) </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 3 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R4.htm </HtmlFileName> |
| | | <LongName> 003 - Statement - Consolidated Statements of Operations </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-consolidated-statements-of-operations </Role> |
| | | <ShortName> Consolidated Statements of Operations </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 4 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R5.htm </HtmlFileName> |
| | | <LongName> 004 - Statement - Consolidated Statement of Stockholders' Equity </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-consolidated-statement-of-stockholders-equity </Role> |
| | | <ShortName> Consolidated Statement of Stockholders' Equity </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 5 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R6.htm </HtmlFileName> |
| | | <LongName> 005 - Statement - Consolidated Statements of Cash Flows </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-consolidated-statements-of-cash-flows </Role> |
| | | <ShortName> Consolidated Statements of Cash Flows </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 6 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R7.htm </HtmlFileName> |
| | | <LongName> 995445 - Disclosure - Insider Trading Arrangements </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements </Role> |
| | | <ShortName> Insider Trading Arrangements </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 7 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R8.htm </HtmlFileName> |
| | | <LongName> 995452 - Disclosure - Note 1 - Description of Business and Significant Accounting Policies </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-1-description-of-business-and-significant-accounting-policies </Role> |
| | | <ShortName> Note 1 - Description of Business and Significant Accounting Policies </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 8 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R9.htm </HtmlFileName> |
| | | <LongName> 995453 - Disclosure - Note 2 - Business Condition and Liquidity </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-2-business-condition-and-liquidity </Role> |
| | | <ShortName> Note 2 - Business Condition and Liquidity </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 9 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R10.htm </HtmlFileName> |
| | | <LongName> 995454 - Disclosure - Note 3 - Purchased Asset and Investments </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-3-purchased-asset-and-investments- </Role> |
| | | <ShortName> Note 3 - Purchased Asset and Investments </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 10 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R11.htm </HtmlFileName> |
| | | <LongName> 995455 - Disclosure - Note 4 - Inventories </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-4-inventories </Role> |
| | | <ShortName> Note 4 - Inventories </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 11 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R12.htm </HtmlFileName> |
| | | <LongName> 995456 - Disclosure - Note 5 - Property, Plant and Equipment </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-5-property-plant-and-equipment- </Role> |
| | | <ShortName> Note 5 - Property, Plant and Equipment </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 12 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R13.htm </HtmlFileName> |
| | | <LongName> 995457 - Disclosure - Note 6 - Patents and Other Intangible Assets </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-6-patents-and-other-intangible-assets </Role> |
| | | <ShortName> Note 6 - Patents and Other Intangible Assets </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 13 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R14.htm </HtmlFileName> |
| | | <LongName> 995458 - Disclosure - Note 7 - Convertible Debentures and Notes Payable </LongName> |
| | | <ReportType> Notes </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-7-convertible-debentures-and-notes-payable </Role> |
| | | <ShortName> Note 7 - Convertible Debentures and Notes Payable </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 14 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R15.htm </HtmlFileName> |
| | | <LongName> 995459 - Disclosure - Note 8 - Lease Obligations </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-8-lease-obligations </Role> |
| | | <ShortName> Note 8 - Lease Obligations </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 15 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R16.htm </HtmlFileName> |
| | | <LongName> 995460 - Disclosure - Note 9 - Shareholders' Equity, Redeemable Convertible Preferred Stock, Options and Warrants </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-9-shareholders-equity-redeemable-convertible-preferred-stock-options-and-warrants </Role> |
| | | <ShortName> Note 9 - Shareholders' Equity, Redeemable Convertible Preferred Stock, Options and Warrants </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 16 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R17.htm </HtmlFileName> |
| | | <LongName> 995461 - Disclosure - Note 10 - Income Taxes </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-10-income-taxes </Role> |
| | | <ShortName> Note 10 - Income Taxes </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 17 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R18.htm </HtmlFileName> |
| | | <LongName> 995462 - Disclosure - Note 11 - Commitments and Contingencies </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-11-commitments-and-contingencies </Role> |
| | | <ShortName> Note 11 - Commitments and Contingencies </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 18 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R19.htm </HtmlFileName> |
| | | <LongName> 995463 - Disclosure - Note 12 - Asset Retirement Obligation </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-12-asset-retirement-obligation </Role> |
| | | <ShortName> Note 12 - Asset Retirement Obligation </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 19 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R20.htm </HtmlFileName> |
| | | <LongName> 995464 - Disclosure - Note 13 - Fair Value Measurements </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-13-fair-value-measurements </Role> |
| | | <ShortName> Note 13 - Fair Value Measurements </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 20 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R21.htm </HtmlFileName> |
| | | <LongName> 995465 - Disclosure - Note 14 - Revenue Recognition </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-14-revenue-recognition </Role> |
| | | <ShortName> Note 14 - Revenue Recognition </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 21 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R22.htm </HtmlFileName> |
| | | <LongName> 995466 - Disclosure - Note 15 - Segment Information </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-15-segment-information </Role> |
| | | <ShortName> Note 15 - Segment Information </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 22 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R23.htm </HtmlFileName> |
| | | <LongName> 995467 - Disclosure - Note 16 - Subsequent Events </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-16-subsequent-events </Role> |
| | | <ShortName> Note 16 - Subsequent Events </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 23 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R24.htm </HtmlFileName> |
| | | <LongName> 995468 - Disclosure - Significant Accounting Policies (Policies) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-significant-accounting-policies-policies </Role> |
| | | <ShortName> Significant Accounting Policies (Policies) </ShortName> |
| | | <MenuCategory> Policies </MenuCategory> |
| | | <ParentRole> http://intisoid.com/20231231/role/statement-note-1-description-of-business-and-significant-accounting-policies </ParentRole> |
| | | <Position> 24 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R25.htm </HtmlFileName> |
| | | <LongName> 995469 - Disclosure - Note 1 - Description of Business and Significant Accounting Policies (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-1-description-of-business-and-significant-accounting-policies-tables </Role> |
| | | <ShortName> Note 1 - Description of Business and Significant Accounting Policies (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://intisoid.com/20231231/role/statement-note-1-description-of-business-and-significant-accounting-policies </ParentRole> |
| | | <Position> 25 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R26.htm </HtmlFileName> |
| | | <LongName> 995470 - Disclosure - Note 5 - Property, Plant and Equipment (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-5-property-plant-and-equipment-tables </Role> |
| | | <ShortName> Note 5 - Property, Plant and Equipment (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://intisoid.com/20231231/role/statement-note-5-property-plant-and-equipment- </ParentRole> |
| | | <Position> 26 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R27.htm </HtmlFileName> |
| | | <LongName> 995471 - Disclosure - Note 6 - Patents and Other Intangible Assets (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-6-patents-and-other-intangible-assets-tables </Role> |
| | | <ShortName> Note 6 - Patents and Other Intangible Assets (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://intisoid.com/20231231/role/statement-note-6-patents-and-other-intangible-assets </ParentRole> |
| | | <Position> 27 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R28.htm </HtmlFileName> |
| | | <LongName> 995472 - Disclosure - Note 7 - Convertible Debentures and Notes Payable (Tables) </LongName> |
| | | <ReportType> Notes </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-7-convertible-debentures-and-notes-payable-tables </Role> |
| | | <ShortName> Note 7 - Convertible Debentures and Notes Payable (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://intisoid.com/20231231/role/statement-note-7-convertible-debentures-and-notes-payable </ParentRole> |
| | | <Position> 28 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R29.htm </HtmlFileName> |
| | | <LongName> 995473 - Disclosure - Note 8 - Lease Obligations (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-8-lease-obligations-tables </Role> |
| | | <ShortName> Note 8 - Lease Obligations (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://intisoid.com/20231231/role/statement-note-8-lease-obligations </ParentRole> |
| | | <Position> 29 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R30.htm </HtmlFileName> |
| | | <LongName> 995474 - Disclosure - Note 9 - Shareholders' Equity, Redeemable Convertible Preferred Stock, Options and Warrants (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-9-shareholders-equity-redeemable-convertible-preferred-stock-options-and-warrants-tables </Role> |
| | | <ShortName> Note 9 - Shareholders' Equity, Redeemable Convertible Preferred Stock, Options and Warrants (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://intisoid.com/20231231/role/statement-note-9-shareholders-equity-redeemable-convertible-preferred-stock-options-and-warrants </ParentRole> |
| | | <Position> 30 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R31.htm </HtmlFileName> |
| | | <LongName> 995475 - Disclosure - Note 10 - Income Taxes (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-10-income-taxes-tables </Role> |
| | | <ShortName> Note 10 - Income Taxes (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://intisoid.com/20231231/role/statement-note-10-income-taxes </ParentRole> |
| | | <Position> 31 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R32.htm </HtmlFileName> |
| | | <LongName> 995476 - Disclosure - Note 12 - Asset Retirement Obligation (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-12-asset-retirement-obligation-tables </Role> |
| | | <ShortName> Note 12 - Asset Retirement Obligation (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://intisoid.com/20231231/role/statement-note-12-asset-retirement-obligation </ParentRole> |
| | | <Position> 32 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R33.htm </HtmlFileName> |
| | | <LongName> 995477 - Disclosure - Note 14 - Revenue Recognition (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-14-revenue-recognition-tables </Role> |
| | | <ShortName> Note 14 - Revenue Recognition (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://intisoid.com/20231231/role/statement-note-14-revenue-recognition </ParentRole> |
| | | <Position> 33 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R34.htm </HtmlFileName> |
| | | <LongName> 995478 - Disclosure - Note 15 - Segment Information (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-15-segment-information-tables </Role> |
| | | <ShortName> Note 15 - Segment Information (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://intisoid.com/20231231/role/statement-note-15-segment-information </ParentRole> |
| | | <Position> 34 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R35.htm </HtmlFileName> |
| | | <LongName> 995479 - Disclosure - Note 1 - Description of Business and Significant Accounting Policies (Details Textual) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-1-description-of-business-and-significant-accounting-policies-details-textual </Role> |
| | | <ShortName> Note 1 - Description of Business and Significant Accounting Policies (Details Textual) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://intisoid.com/20231231/role/statement-note-1-description-of-business-and-significant-accounting-policies-tables </ParentRole> |
| | | <Position> 35 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R36.htm </HtmlFileName> |
| | | <LongName> 995480 - Disclosure - Note 1 - Description of Business and Significant Accounting Policies - Schedule of Weighted Average Number of Shares (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-1-description-of-business-and-significant-accounting-policies-schedule-of-weighted-average-number-of-shares-details </Role> |
| | | <ShortName> Note 1 - Description of Business and Significant Accounting Policies - Schedule of Weighted Average Number of Shares (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 36 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R37.htm </HtmlFileName> |
| | | <LongName> 995481 - Disclosure - Note 1 - Description of Business and Significant Accounting Policies - Schedule of Common Stock Equivalents Outstanding (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-1-description-of-business-and-significant-accounting-policies-schedule-of-common-stock-equivalents-outstanding-details </Role> |
| | | <ShortName> Note 1 - Description of Business and Significant Accounting Policies - Schedule of Common Stock Equivalents Outstanding (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 37 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R38.htm </HtmlFileName> |
| | | <LongName> 995482 - Disclosure - Note 2 - Business Condition and Liquidity (Details Textual) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-2-business-condition-and-liquidity-details-textual </Role> |
| | | <ShortName> Note 2 - Business Condition and Liquidity (Details Textual) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://intisoid.com/20231231/role/statement-note-2-business-condition-and-liquidity </ParentRole> |
| | | <Position> 38 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R39.htm </HtmlFileName> |
| | | <LongName> 995483 - Disclosure - Note 4 - Inventories (Details Textual) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-4-inventories-details-textual </Role> |
| | | <ShortName> Note 4 - Inventories (Details Textual) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://intisoid.com/20231231/role/statement-note-4-inventories </ParentRole> |
| | | <Position> 39 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R40.htm </HtmlFileName> |
| | | <LongName> 995484 - Disclosure - Note 5 - Property, Plant and Equipment (Details Textual) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-5-property-plant-and-equipment-details-textual </Role> |
| | | <ShortName> Note 5 - Property, Plant and Equipment (Details Textual) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://intisoid.com/20231231/role/statement-note-5-property-plant-and-equipment-tables </ParentRole> |
| | | <Position> 40 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R41.htm </HtmlFileName> |
| | | <LongName> 995485 - Disclosure - Note 5 - Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-5-property-plant-and-equipment-schedule-of-property-plant-and-equipment-details </Role> |
| | | <ShortName> Note 5 - Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 41 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R42.htm </HtmlFileName> |
| | | <LongName> 995486 - Disclosure - Note 6 - Patents and Other Intangible Assets (Details Textual) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-6-patents-and-other-intangible-assets-details-textual </Role> |
| | | <ShortName> Note 6 - Patents and Other Intangible Assets (Details Textual) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://intisoid.com/20231231/role/statement-note-6-patents-and-other-intangible-assets-tables </ParentRole> |
| | | <Position> 42 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R43.htm </HtmlFileName> |
| | | <LongName> 995487 - Disclosure - Note 6 - Patents and Other Intangible Assets - Schedule of Intangible Assets (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-6-patents-and-other-intangible-assets-schedule-of-intangible-assets-details </Role> |
| | | <ShortName> Note 6 - Patents and Other Intangible Assets - Schedule of Intangible Assets (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 43 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R44.htm </HtmlFileName> |
| | | <LongName> 995488 - Disclosure - Note 6 - Patents and Other Intangible Assets - Schedule of Future Amortization Expense (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-6-patents-and-other-intangible-assets-schedule-of-future-amortization-expense-details </Role> |
| | | <ShortName> Note 6 - Patents and Other Intangible Assets - Schedule of Future Amortization Expense (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 44 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R45.htm </HtmlFileName> |
| | | <LongName> 995489 - Disclosure - Note 7 - Convertible Debentures and Notes Payable (Details Textual) </LongName> |
| | | <ReportType> Notes </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-7-convertible-debentures-and-notes-payable-details-textual </Role> |
| | | <ShortName> Note 7 - Convertible Debentures and Notes Payable (Details Textual) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://intisoid.com/20231231/role/statement-note-7-convertible-debentures-and-notes-payable-tables </ParentRole> |
| | | <Position> 45 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R46.htm </HtmlFileName> |
| | | <LongName> 995490 - Disclosure - Note 7 - Convertible Debentures and Notes Payable - Schedule of Long-term Debt Instruments (Details) </LongName> |
| | | <ReportType> Notes </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-7-convertible-debentures-and-notes-payable-schedule-of-longterm-debt-instruments-details </Role> |
| | | <ShortName> Note 7 - Convertible Debentures and Notes Payable - Schedule of Long-term Debt Instruments (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 46 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R47.htm </HtmlFileName> |
| | | <LongName> 995491 - Disclosure - Note 7 - Convertible Debentures and Notes Payable - Schedule of Long-term Debt Instruments (Details) (Parentheticals) </LongName> |
| | | <ReportType> Notes </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-7-convertible-debentures-and-notes-payable-schedule-of-longterm-debt-instruments-details-parentheticals </Role> |
| | | <ShortName> Note 7 - Convertible Debentures and Notes Payable - Schedule of Long-term Debt Instruments (Details) (Parentheticals) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 47 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R48.htm </HtmlFileName> |
| | | <LongName> 995492 - Disclosure - Note 7 - Convertible Debentures and Notes Payable - Schedule of Maturities of Long-term Debt (Details) </LongName> |
| | | <ReportType> Notes </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-7-convertible-debentures-and-notes-payable-schedule-of-maturities-of-longterm-debt-details </Role> |
| | | <ShortName> Note 7 - Convertible Debentures and Notes Payable - Schedule of Maturities of Long-term Debt (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 48 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R49.htm </HtmlFileName> |
| | | <LongName> 995493 - Disclosure - Note 8 - Lease Obligations - Lease Cost (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-8-lease-obligations-lease-cost-details </Role> |
| | | <ShortName> Note 8 - Lease Obligations - Lease Cost (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 49 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R50.htm </HtmlFileName> |
| | | <LongName> 995494 - Disclosure - Note 8 - Lease Obligations - Schedule of Future Minimum Lease Payments (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-8-lease-obligations-schedule-of-future-minimum-lease-payments-details </Role> |
| | | <ShortName> Note 8 - Lease Obligations - Schedule of Future Minimum Lease Payments (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 50 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R51.htm </HtmlFileName> |
| | | <LongName> 995495 - Disclosure - Note 9 - Shareholders' Equity, Redeemable Convertible Preferred Stock, Options and Warrants (Details Textual) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-9-shareholders-equity-redeemable-convertible-preferred-stock-options-and-warrants-details-textual </Role> |
| | | <ShortName> Note 9 - Shareholders' Equity, Redeemable Convertible Preferred Stock, Options and Warrants (Details Textual) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://intisoid.com/20231231/role/statement-note-9-shareholders-equity-redeemable-convertible-preferred-stock-options-and-warrants-tables </ParentRole> |
| | | <Position> 51 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R52.htm </HtmlFileName> |
| | | <LongName> 995496 - Disclosure - Note 9 - Shareholders' Equity, Redeemable Convertible Preferred Stock, Options and Warrants - Schedule of Warrant Activity (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-9-shareholders-equity-redeemable-convertible-preferred-stock-options-and-warrants-schedule-of-warrant-activity-details </Role> |
| | | <ShortName> Note 9 - Shareholders' Equity, Redeemable Convertible Preferred Stock, Options and Warrants - Schedule of Warrant Activity (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 52 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R53.htm </HtmlFileName> |
| | | <LongName> 995497 - Disclosure - Note 9 - Shareholders' Equity, Redeemable Convertible Preferred Stock, Options and Warrants - Option Activity (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-9-shareholders-equity-redeemable-convertible-preferred-stock-options-and-warrants-option-activity-details </Role> |
| | | <ShortName> Note 9 - Shareholders' Equity, Redeemable Convertible Preferred Stock, Options and Warrants - Option Activity (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://intisoid.com/20231231/role/statement-note-9-shareholders-equity-redeemable-convertible-preferred-stock-options-and-warrants-tables </ParentRole> |
| | | <Position> 53 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R54.htm </HtmlFileName> |
| | | <LongName> 995498 - Disclosure - Note 9 - Shareholders' Equity, Redeemable Convertible Preferred Stock, Options and Warrants - Restricted Stock Units Activity (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-9-shareholders-equity-redeemable-convertible-preferred-stock-options-and-warrants-restricted-stock-units-activity-details </Role> |
| | | <ShortName> Note 9 - Shareholders' Equity, Redeemable Convertible Preferred Stock, Options and Warrants - Restricted Stock Units Activity (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 54 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R55.htm </HtmlFileName> |
| | | <LongName> 995499 - Disclosure - Note 10 - Income Taxes (Details Textual) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-10-income-taxes-details-textual </Role> |
| | | <ShortName> Note 10 - Income Taxes (Details Textual) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://intisoid.com/20231231/role/statement-note-10-income-taxes-tables </ParentRole> |
| | | <Position> 55 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R56.htm </HtmlFileName> |
| | | <LongName> 995500 - Disclosure - Note 10 - Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-10-income-taxes-schedule-of-effective-income-tax-rate-reconciliation-details </Role> |
| | | <ShortName> Note 10 - Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 56 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R57.htm </HtmlFileName> |
| | | <LongName> 995501 - Disclosure - Note 10 - Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-10-income-taxes-schedule-of-deferred-tax-assets-and-liabilities-details </Role> |
| | | <ShortName> Note 10 - Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 57 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R58.htm </HtmlFileName> |
| | | <LongName> 995502 - Disclosure - Note 11 - Commitments and Contingencies (Details Textual) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-11-commitments-and-contingencies-details-textual </Role> |
| | | <ShortName> Note 11 - Commitments and Contingencies (Details Textual) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://intisoid.com/20231231/role/statement-note-11-commitments-and-contingencies </ParentRole> |
| | | <Position> 58 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R59.htm </HtmlFileName> |
| | | <LongName> 995503 - Disclosure - Note 12 - Asset Retirement Obligation - Schedule of Asset Retirement Obligation Activity (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-12-asset-retirement-obligation-schedule-of-asset-retirement-obligation-activity-details </Role> |
| | | <ShortName> Note 12 - Asset Retirement Obligation - Schedule of Asset Retirement Obligation Activity (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 59 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R60.htm </HtmlFileName> |
| | | <LongName> 995504 - Disclosure - Note 13 - Fair Value Measurements (Details Textual) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-13-fair-value-measurements-details-textual </Role> |
| | | <ShortName> Note 13 - Fair Value Measurements (Details Textual) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://intisoid.com/20231231/role/statement-note-13-fair-value-measurements </ParentRole> |
| | | <Position> 60 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R61.htm </HtmlFileName> |
| | | <LongName> 995505 - Disclosure - Note 14 - Revenue Recognition (Details Textual) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-14-revenue-recognition-details-textual </Role> |
| | | <ShortName> Note 14 - Revenue Recognition (Details Textual) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://intisoid.com/20231231/role/statement-note-14-revenue-recognition-tables </ParentRole> |
| | | <Position> 61 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R62.htm </HtmlFileName> |
| | | <LongName> 995506 - Disclosure - Note 14 - Revenue Recognition - Disaggregation of Revenue (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-14-revenue-recognition-disaggregation-of-revenue-details </Role> |
| | | <ShortName> Note 14 - Revenue Recognition - Disaggregation of Revenue (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 62 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R63.htm </HtmlFileName> |
| | | <LongName> 995507 - Disclosure - Note 15 - Segment Information - Schedule of Segment Information by Segment (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-15-segment-information-schedule-of-segment-information-by-segment-details </Role> |
| | | <ShortName> Note 15 - Segment Information - Schedule of Segment Information by Segment (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 63 </Position> |
| | | </Report> |
| | <Report instance="inis20221231_10k.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R64.htm </HtmlFileName> |
| | | <LongName> 995508 - Disclosure - Note 16 - Subsequent Events (Details Textual) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://intisoid.com/20231231/role/statement-note-16-subsequent-events-details-textual </Role> |
| | | <ShortName> Note 16 - Subsequent Events (Details Textual) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://intisoid.com/20231231/role/statement-note-16-subsequent-events </ParentRole> |
| | | <Position> 64 </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: 62 fact(s) appearing in ix:hidden were eligible for transformation: dei:CurrentFiscalYearEndDate, dei:EntityRegistrantName, ecd:NonRule10b51ArrAdoptedFlag, ecd:NonRule10b51ArrTrmntdFlag, ecd:Rule10b51ArrAdoptedFlag, ecd:Rule10b51ArrTrmntdFlag, inis:ContractTerm, us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent, us-gaap:AssetsFairValueDisclosure, us-gaap:ClassOfWarrantOrRightOutstanding, us-gaap:CommonStockParOrStatedValuePerShare, us-gaap:CommonStockSharesAuthorized, us-gaap:CommonStockSharesIssued, us-gaap:CommonStockSharesOutstanding, us-gaap:DebtInstrumentInterestRateStatedPercentage, us-gaap:DebtInstrumentMaturityDate, us-gaap:DebtInstrumentPeriodicPaymentPrincipal, us-gaap:DividendsPayableCurrentAndNoncurrent, us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense, us-gaap:GoodwillImpairmentLoss, us-gaap:ImpairmentOfIntangibleAssetsFinitelived, us-gaap:ImpairmentOfLongLivedAssetsHeldForUse, us-gaap:IncomeTaxExpenseBenefit, us-gaap:InventoryWriteDown, us-gaap:PreferredStockSharesOutstanding, us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1, us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage, us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod, us-gaap:WarrantsAndRightsOutstandingTerm - inis20221231_10k.htm 8, 10, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72 </Log> |
| | <Log type="Warning"> [EXG.rendering.tooManyDimensions] Presentation group http://intisoid.com/20231231/role/statement-note-9-shareholders-equity-redeemable-convertible-preferred-stock-options-and-warrants-details-textual with 12 axes could have more than 9 billion cells. Split up this presentation group and see EXG, Rendering, to see how to reduce the number of combinations by selecting fewer members for each axis. - inis20221231_10k.htm - inis20221231_10k.htm </Log> |
| | </Logs> |
| <InputFiles> |
| | <File> inis-20231231.xsd </File> |
| | <File> inis-20231231_cal.xml </File> |
| | <File> inis-20231231_def.xml </File> |
| | <File> inis-20231231_lab.xml </File> |
| | <File> inis-20231231_pre.xml </File> |
| | <File doctype="10-K" isDefinitelyFs="true" isUsgaap="true" original="inis20221231_10k.htm"> inis20221231_10k.htm </File> |
| | </InputFiles> |
| <SupplementalFiles> |
| | <File> auditopinionjpg_page1.jpg </File> |
| | <File> auditopinionjpg_page2.jpg </File> |
| | </SupplementalFiles> |
| <BaseTaxonomies> |
| | <BaseTaxonomy items="847"> http://fasb.org/us-gaap/2023 </BaseTaxonomy> |
| | <BaseTaxonomy items="35"> http://xbrl.sec.gov/dei/2023 </BaseTaxonomy> |
| | <BaseTaxonomy items="5"> http://xbrl.sec.gov/ecd/2023 </BaseTaxonomy> |
| | </BaseTaxonomies> |
| <HasPresentationLinkbase> true </HasPresentationLinkbase> |
| <HasCalculationLinkbase> true </HasCalculationLinkbase> |
| </FilingSummary> |