3.26.1 html 211 414 1 true 79 0 false 4 false false R1.htm 000 - Document - Document And Entity Information Sheet http://bio-key.com/20251231/role/statement-document-and-entity-information Document And Entity Information Cover 1 false false R2.htm 001 - Statement - Consolidated Balance Sheets Sheet http://bio-key.com/20251231/role/statement-consolidated-balance-sheets Consolidated Balance Sheets Statements 2 false false R3.htm 002 - Statement - Consolidated Balance Sheets (Parentheticals) Sheet http://bio-key.com/20251231/role/statement-consolidated-balance-sheets-parentheticals Consolidated Balance Sheets (Parentheticals) Statements 3 false false R4.htm 003 - Statement - Consolidated Statements of Operations and Comprehensive Loss Sheet http://bio-key.com/20251231/role/statement-consolidated-statements-of-operations-and-comprehensive-loss- Consolidated Statements of Operations and Comprehensive Loss Statements 4 false false R5.htm 004 - Statement - Consolidated Statements of Stockholders' Equity Sheet http://bio-key.com/20251231/role/statement-consolidated-statements-of-stockholders-equity Consolidated Statements of Stockholders' Equity Statements 5 false false R6.htm 005 - Statement - Consolidated Statements of Cash Flows Sheet http://bio-key.com/20251231/role/statement-consolidated-statements-of-cash-flows Consolidated Statements of Cash Flows Statements 6 false false R7.htm 995443 - Disclosure - Award Timing Disclosure Sheet http://xbrl.sec.gov/ecd/role/AwardTimingDisclosure Award Timing Disclosure Notes 7 false false R8.htm 995445 - Disclosure - Insider Trading Arrangements Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements Insider Trading Arrangements Notes 8 false false R9.htm 995447 - Disclosure - Insider Trading Policies and Procedures Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingPoliciesProc Insider Trading Policies and Procedures Notes 9 false false R10.htm 995550 - Disclosure - Cybersecurity Risk Management and Strategy Disclosure Sheet http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure Cybersecurity Risk Management and Strategy Disclosure Notes 10 false false R11.htm 995554 - Disclosure - Note A - The Company and Summary of Significant Accounting Policies Sheet http://bio-key.com/20251231/role/statement-note-a-the-company-and-summary-of-significant-accounting-policies Note A - The Company and Summary of Significant Accounting Policies Notes 11 false false R12.htm 995555 - Disclosure - Note B - Revenue From Contracts With Customers Sheet http://bio-key.com/20251231/role/statement-note-b-revenue-from-contracts-with-customers Note B - Revenue From Contracts With Customers Notes 12 false false R13.htm 995556 - Disclosure - Note C - Fair Values of Financial Instruments Sheet http://bio-key.com/20251231/role/statement-note-c-fair-values-of-financial-instruments Note C - Fair Values of Financial Instruments Notes 13 false false R14.htm 995557 - Disclosure - Note D - Concentration of Risk Sheet http://bio-key.com/20251231/role/statement-note-d-concentration-of-risk Note D - Concentration of Risk Notes 14 false false R15.htm 995558 - Disclosure - Note E - Inventory Sheet http://bio-key.com/20251231/role/statement-note-e-inventory- Note E - Inventory Notes 15 false false R16.htm 995559 - Disclosure - Note F - Equipment and Leasehold Improvements Sheet http://bio-key.com/20251231/role/statement-note-f-equipment-and-leasehold-improvements Note F - Equipment and Leasehold Improvements Notes 16 false false R17.htm 995560 - Disclosure - Note G - Intangible Assets And Goodwill Sheet http://bio-key.com/20251231/role/statement-note-g-intangible-assets-and-goodwill Note G - Intangible Assets And Goodwill Notes 17 false false R18.htm 995561 - Disclosure - Note H - Investments Sheet http://bio-key.com/20251231/role/statement-note-h-investments Note H - Investments Notes 18 false false R19.htm 995562 - Disclosure - Note I - Accrued Liabilities Sheet http://bio-key.com/20251231/role/statement-note-i-accrued-liabilities Note I - Accrued Liabilities Notes 19 false false R20.htm 995563 - Disclosure - Note J - Note Payable Sheet http://bio-key.com/20251231/role/statement-note-j-note-payable Note J - Note Payable Notes 20 false false R21.htm 995564 - Disclosure - Note K - Leases Sheet http://bio-key.com/20251231/role/statement-note-k-leases Note K - Leases Notes 21 false false R22.htm 995565 - Disclosure - Note L - Contingencies Sheet http://bio-key.com/20251231/role/statement-note-l-contingencies- Note L - Contingencies Notes 22 false false R23.htm 995566 - Disclosure - Note M - Equity Sheet http://bio-key.com/20251231/role/statement-note-m-equity Note M - Equity Notes 23 false false R24.htm 995567 - Disclosure - Note N - Stock Options Sheet http://bio-key.com/20251231/role/statement-note-n-stock-options Note N - Stock Options Notes 24 false false R25.htm 995568 - Disclosure - Note O - Income Taxes Sheet http://bio-key.com/20251231/role/statement-note-o-income-taxes Note O - Income Taxes Notes 25 false false R26.htm 995569 - Disclosure - Note P - Savings Plans Sheet http://bio-key.com/20251231/role/statement-note-p-savings-plans- Note P - Savings Plans Notes 26 false false R27.htm 995570 - Disclosure - Note Q - Earnings Per Share (EPS) Sheet http://bio-key.com/20251231/role/statement-note-q-earnings-per-share-eps Note Q - Earnings Per Share (EPS) Notes 27 false false R28.htm 995571 - Disclosure - Note R - Segments Sheet http://bio-key.com/20251231/role/statement-note-r-segments Note R - Segments Notes 28 false false R29.htm 995572 - Disclosure - Note S - Subsequent Events Sheet http://bio-key.com/20251231/role/statement-note-s-subsequent-events Note S - Subsequent Events Notes 29 false false R30.htm 995573 - Disclosure - Significant Accounting Policies (Policies) Sheet http://bio-key.com/20251231/role/statement-significant-accounting-policies-policies Significant Accounting Policies (Policies) Policies http://bio-key.com/20251231/role/statement-note-a-the-company-and-summary-of-significant-accounting-policies 30 false false R31.htm 995574 - Disclosure - Note A - The Company and Summary of Significant Accounting Policies (Tables) Sheet http://bio-key.com/20251231/role/statement-note-a-the-company-and-summary-of-significant-accounting-policies-tables Note A - The Company and Summary of Significant Accounting Policies (Tables) Tables http://bio-key.com/20251231/role/statement-note-a-the-company-and-summary-of-significant-accounting-policies 31 false false R32.htm 995575 - Disclosure - Note B - Revenue From Contracts With Customers (Tables) Sheet http://bio-key.com/20251231/role/statement-note-b-revenue-from-contracts-with-customers-tables Note B - Revenue From Contracts With Customers (Tables) Tables http://bio-key.com/20251231/role/statement-note-b-revenue-from-contracts-with-customers 32 false false R33.htm 995576 - Disclosure - Note E - Inventory (Tables) Sheet http://bio-key.com/20251231/role/statement-note-e-inventory-tables Note E - Inventory (Tables) Tables http://bio-key.com/20251231/role/statement-note-e-inventory- 33 false false R34.htm 995577 - Disclosure - Note F - Equipment and Leasehold Improvements (Tables) Sheet http://bio-key.com/20251231/role/statement-note-f-equipment-and-leasehold-improvements-tables Note F - Equipment and Leasehold Improvements (Tables) Tables http://bio-key.com/20251231/role/statement-note-f-equipment-and-leasehold-improvements 34 false false R35.htm 995578 - Disclosure - Note G - Intangible Assets And Goodwill (Tables) Sheet http://bio-key.com/20251231/role/statement-note-g-intangible-assets-and-goodwill-tables Note G - Intangible Assets And Goodwill (Tables) Tables http://bio-key.com/20251231/role/statement-note-g-intangible-assets-and-goodwill 35 false false R36.htm 995579 - Disclosure - Note I - Accrued Liabilities (Tables) Sheet http://bio-key.com/20251231/role/statement-note-i-accrued-liabilities-tables Note I - Accrued Liabilities (Tables) Tables http://bio-key.com/20251231/role/statement-note-i-accrued-liabilities 36 false false R37.htm 995580 - Disclosure - Note K - Leases (Tables) Sheet http://bio-key.com/20251231/role/statement-note-k-leases-tables Note K - Leases (Tables) Tables http://bio-key.com/20251231/role/statement-note-k-leases 37 false false R38.htm 995581 - Disclosure - Note M - Equity (Tables) Sheet http://bio-key.com/20251231/role/statement-note-m-equity-tables Note M - Equity (Tables) Tables http://bio-key.com/20251231/role/statement-note-m-equity 38 false false R39.htm 995582 - Disclosure - Note N - Stock Options (Tables) Sheet http://bio-key.com/20251231/role/statement-note-n-stock-options-tables Note N - Stock Options (Tables) Tables http://bio-key.com/20251231/role/statement-note-n-stock-options 39 false false R40.htm 995583 - Disclosure - Note O - Income Taxes (Tables) Sheet http://bio-key.com/20251231/role/statement-note-o-income-taxes-tables Note O - Income Taxes (Tables) Tables http://bio-key.com/20251231/role/statement-note-o-income-taxes 40 false false R41.htm 995584 - Disclosure - Note Q - Earnings Per Share (EPS) (Tables) Sheet http://bio-key.com/20251231/role/statement-note-q-earnings-per-share-eps-tables Note Q - Earnings Per Share (EPS) (Tables) Tables http://bio-key.com/20251231/role/statement-note-q-earnings-per-share-eps 41 false false R42.htm 995585 - Disclosure - Note A - The Company and Summary of Significant Accounting Policies (Details Textual) Sheet http://bio-key.com/20251231/role/statement-note-a-the-company-and-summary-of-significant-accounting-policies-details-textual Note A - The Company and Summary of Significant Accounting Policies (Details Textual) Details http://bio-key.com/20251231/role/statement-note-a-the-company-and-summary-of-significant-accounting-policies-tables 42 false false R43.htm 995586 - Disclosure - Note A - The Company and Summary of Significant Accounting Policies - Summary of Accounts Receivable (Details) Sheet http://bio-key.com/20251231/role/statement-note-a-the-company-and-summary-of-significant-accounting-policies-summary-of-accounts-receivable-details Note A - The Company and Summary of Significant Accounting Policies - Summary of Accounts Receivable (Details) Details 43 false false R44.htm 995587 - Disclosure - Note A - The Company and Summary of Significant Accounting Policies - Estimated Useful Lives for Depreciation and Amortization (Details) Sheet http://bio-key.com/20251231/role/statement-note-a-the-company-and-summary-of-significant-accounting-policies-estimated-useful-lives-for-depreciation-and-amortization-details Note A - The Company and Summary of Significant Accounting Policies - Estimated Useful Lives for Depreciation and Amortization (Details) Details 44 false false R45.htm 995588 - Disclosure - Note A - The Company and Summary of Significant Accounting Policies - Share-based Compensation Expenses for Continuing Operations (Details) Sheet http://bio-key.com/20251231/role/statement-note-a-the-company-and-summary-of-significant-accounting-policies-sharebased-compensation-expenses-for-continuing-operations-details Note A - The Company and Summary of Significant Accounting Policies - Share-based Compensation Expenses for Continuing Operations (Details) Details 45 false false R46.htm 995589 - Disclosure - Note B - Revenue From Contracts With Customers (Details Textual) Sheet http://bio-key.com/20251231/role/statement-note-b-revenue-from-contracts-with-customers-details-textual Note B - Revenue From Contracts With Customers (Details Textual) Details http://bio-key.com/20251231/role/statement-note-b-revenue-from-contracts-with-customers-tables 46 false false R47.htm 995590 - Disclosure - Note B - Revenue From Contracts With Customers - Disaggregation of Revenue (Details) Sheet http://bio-key.com/20251231/role/statement-note-b-revenue-from-contracts-with-customers-disaggregation-of-revenue-details Note B - Revenue From Contracts With Customers - Disaggregation of Revenue (Details) Details 47 false false R48.htm 995591 - Disclosure - Note D - Concentration of Risk (Details Textual) Sheet http://bio-key.com/20251231/role/statement-note-d-concentration-of-risk-details-textual Note D - Concentration of Risk (Details Textual) Details http://bio-key.com/20251231/role/statement-note-d-concentration-of-risk 48 false false R49.htm 995592 - Disclosure - Note E - Inventory - Components of Inventory (Details) Sheet http://bio-key.com/20251231/role/statement-note-e-inventory-components-of-inventory-details Note E - Inventory - Components of Inventory (Details) Details 49 false false R50.htm 995593 - Disclosure - Note F - Equipment and Leasehold Improvements (Details Textual) Sheet http://bio-key.com/20251231/role/statement-note-f-equipment-and-leasehold-improvements-details-textual Note F - Equipment and Leasehold Improvements (Details Textual) Details http://bio-key.com/20251231/role/statement-note-f-equipment-and-leasehold-improvements-tables 50 false false R51.htm 995594 - Disclosure - Note F - Equipment and Leasehold Improvements - Summary of Equipment and Leasehold Improvements (Details) Sheet http://bio-key.com/20251231/role/statement-note-f-equipment-and-leasehold-improvements-summary-of-equipment-and-leasehold-improvements-details Note F - Equipment and Leasehold Improvements - Summary of Equipment and Leasehold Improvements (Details) Details 51 false false R52.htm 995595 - Disclosure - Note G - Intangible Assets And Goodwill (Details Textual) Sheet http://bio-key.com/20251231/role/statement-note-g-intangible-assets-and-goodwill-details-textual Note G - Intangible Assets And Goodwill (Details Textual) Details http://bio-key.com/20251231/role/statement-note-g-intangible-assets-and-goodwill-tables 52 false false R53.htm 995596 - Disclosure - Note G - Intangible Assets - Summary of Intangible Assets (Details) Sheet http://bio-key.com/20251231/role/statement-note-g-intangible-assets-summary-of-intangible-assets-details Note G - Intangible Assets - Summary of Intangible Assets (Details) Details 53 false false R54.htm 995597 - Disclosure - Note G - Intangible Assets and Goodwill - Amortization Expense (Details) Sheet http://bio-key.com/20251231/role/statement-note-g-intangible-assets-and-goodwill-amortization-expense-details Note G - Intangible Assets and Goodwill - Amortization Expense (Details) Details 54 false false R55.htm 995598 - Disclosure - Note H - Investments (Details Textual) Sheet http://bio-key.com/20251231/role/statement-note-h-investments-details-textual Note H - Investments (Details Textual) Details http://bio-key.com/20251231/role/statement-note-h-investments 55 false false R56.htm 995599 - Disclosure - Note I - Accrued Liabilities (Details Textual) Sheet http://bio-key.com/20251231/role/statement-note-i-accrued-liabilities-details-textual Note I - Accrued Liabilities (Details Textual) Details http://bio-key.com/20251231/role/statement-note-i-accrued-liabilities-tables 56 false false R57.htm 995600 - Disclosure - Note I - Accrued Liabilities - Summary of Accrued Liabilities (Details) Sheet http://bio-key.com/20251231/role/statement-note-i-accrued-liabilities-summary-of-accrued-liabilities-details Note I - Accrued Liabilities - Summary of Accrued Liabilities (Details) Details 57 false false R58.htm 995601 - Disclosure - Note J - Note Payable (Details Textual) Sheet http://bio-key.com/20251231/role/statement-note-j-note-payable-details-textual Note J - Note Payable (Details Textual) Details http://bio-key.com/20251231/role/statement-note-j-note-payable 58 false false R59.htm 995602 - Disclosure - Note K - Leases - Operating Lease Balance Sheet Information (Details) Sheet http://bio-key.com/20251231/role/statement-note-k-leases-operating-lease-balance-sheet-information-details Note K - Leases - Operating Lease Balance Sheet Information (Details) Details 59 false false R60.htm 995603 - Disclosure - Note M - Equity (Details Textual) Sheet http://bio-key.com/20251231/role/statement-note-m-equity-details-textual Note M - Equity (Details Textual) Details http://bio-key.com/20251231/role/statement-note-m-equity-tables 60 false false R61.htm 995604 - Disclosure - Note M - Equity - Valuation Assumptions for Warrants (Details) Sheet http://bio-key.com/20251231/role/statement-note-m-equity-valuation-assumptions-for-warrants-details Note M - Equity - Valuation Assumptions for Warrants (Details) Details 61 false false R62.htm 995605 - Disclosure - Note M - Equity - Summary of Warrant Activity (Details) Sheet http://bio-key.com/20251231/role/statement-note-m-equity-summary-of-warrant-activity-details Note M - Equity - Summary of Warrant Activity (Details) Details 62 false false R63.htm 995606 - Disclosure - Note N - Stock Options (Details Textual) Sheet http://bio-key.com/20251231/role/statement-note-n-stock-options-details-textual Note N - Stock Options (Details Textual) Details http://bio-key.com/20251231/role/statement-note-n-stock-options-tables 63 false false R64.htm 995607 - Disclosure - Note N - Stock Options - Option Activity (Details) Sheet http://bio-key.com/20251231/role/statement-note-n-stock-options-option-activity-details Note N - Stock Options - Option Activity (Details) Details 64 false false R65.htm 995608 - Disclosure - Note N - Stock Options - Options Outstanding and Exercisable (Details) Sheet http://bio-key.com/20251231/role/statement-note-n-stock-options-options-outstanding-and-exercisable-details Note N - Stock Options - Options Outstanding and Exercisable (Details) Details 65 false false R66.htm 995609 - Disclosure - Note O - Income Taxes (Details Textual) Sheet http://bio-key.com/20251231/role/statement-note-o-income-taxes-details-textual Note O - Income Taxes (Details Textual) Details http://bio-key.com/20251231/role/statement-note-o-income-taxes-tables 66 false false R67.htm 995610 - Disclosure - Note O - Income Taxes - Components of Net Loss (Details) Sheet http://bio-key.com/20251231/role/statement-note-o-income-taxes-components-of-net-loss-details Note O - Income Taxes - Components of Net Loss (Details) Details 67 false false R68.htm 995611 - Disclosure - Note O - Income Taxes - Provision for Income Tax Benefits (Details) Sheet http://bio-key.com/20251231/role/statement-note-o-income-taxes-provision-for-income-tax-benefits-details Note O - Income Taxes - Provision for Income Tax Benefits (Details) Details 68 false false R69.htm 995612 - Disclosure - Note O - Income Taxes - Components of Deferred Taxes (Details) Sheet http://bio-key.com/20251231/role/statement-note-o-income-taxes-components-of-deferred-taxes-details Note O - Income Taxes - Components of Deferred Taxes (Details) Details 69 false false R70.htm 995613 - Disclosure - Note O - Income Taxes - Reconciliation of the Effective Income Tax Rate to US Federal Statutory Income Tax Rate (Details) Sheet http://bio-key.com/20251231/role/statement-note-o-income-taxes-reconciliation-of-the-effective-income-tax-rate-to-us-federal-statutory-income-tax-rate-details Note O - Income Taxes - Reconciliation of the Effective Income Tax Rate to US Federal Statutory Income Tax Rate (Details) Details 70 false false R71.htm 995614 - Disclosure - Note P - Savings Plans (Details Textual) Sheet http://bio-key.com/20251231/role/statement-note-p-savings-plans-details-textual Note P - Savings Plans (Details Textual) Details http://bio-key.com/20251231/role/statement-note-p-savings-plans- 71 false false R72.htm 995615 - Disclosure - Note Q - Earnings Per Share (EPS) (Details Textual) Sheet http://bio-key.com/20251231/role/statement-note-q-earnings-per-share-eps-details-textual Note Q - Earnings Per Share (EPS) (Details Textual) Details http://bio-key.com/20251231/role/statement-note-q-earnings-per-share-eps-tables 72 false false R73.htm 995616 - Disclosure - Note Q - Earnings Per Share (EPS) - Securities Excluded From the Diluted Per Share Calculation (Details) Sheet http://bio-key.com/20251231/role/statement-note-q-earnings-per-share-eps-securities-excluded-from-the-diluted-per-share-calculation-details Note Q - Earnings Per Share (EPS) - Securities Excluded From the Diluted Per Share Calculation (Details) Details http://bio-key.com/20251231/role/statement-note-q-earnings-per-share-eps-tables 73 false false R74.htm 995617 - Disclosure - Note R - Segments (Details Textual) Sheet http://bio-key.com/20251231/role/statement-note-r-segments-details-textual Note R - Segments (Details Textual) Details http://bio-key.com/20251231/role/statement-note-r-segments 74 false false R75.htm 995618 - Disclosure - Note S - Subsequent Events (Details Textual) Sheet http://bio-key.com/20251231/role/statement-note-s-subsequent-events-details-textual Note S - Subsequent Events (Details Textual) Details http://bio-key.com/20251231/role/statement-note-s-subsequent-events 75 false false All Reports Book All Reports bkyi-20251231.xsd bkyi-20251231_cal.xml bkyi-20251231_def.xml bkyi-20251231_lab.xml bkyi-20251231_pre.xml bkyi20251231c_10k.htm http://fasb.org/us-gaap/2026 http://xbrl.sec.gov/cyd/2026 http://xbrl.sec.gov/dei/2026 http://xbrl.sec.gov/ecd/2026 true true