Significant Accounting Policies (Policies)	3 Months Ended
Mar. 31, 2025
Accounting Policies [Abstract]
Basis of Accounting, Policy [Policy Text Block]	Basis of Presentation The accompanying unaudited interim condensed consolidated financial statements include the accounts of BIO-key International, Inc. and its wholly-owned subsidiaries (collectively, the “Company” or “BIO-key”) and are stated in conformity with accounting principles generally accepted in the United States of America (“GAAP”), pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”). The operating results for interim periods are not necessarily indicative of results that may be expected for any other interim period or for the full year. Pursuant to such rules and regulations, certain financial information and footnote disclosures normally included in the financial statements have been condensed or omitted. Intercompany accounts and transactions have been eliminated in consolidation. In the opinion of management, the accompanying unaudited interim consolidated financial statements contain all necessary adjustments, consisting only of those of a recurring nature, and disclosures to present fairly the Company’s financial position and the results of its operations and cash flows for the periods presented. The balance sheet at March 31, 2025 was derived from the audited financial statements, but does not include all of the disclosures required by GAAP. These unaudited interim condensed consolidated financial statements should be read in conjunction with the financial statements and the related notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2024, filed with the SEC on June 5, 2024.
Foreign Currency Transactions and Translations Policy [Policy Text Block]	Foreign Currencies The Company accounts for foreign currency transactions pursuant to ASC 830, Foreign Currency Matters ("ASC 830”). The functional currency of the Company is the U.S. dollar, which is the currency of the primary economic environment in which it operates. In accordance with ASC 830, all assets and liabilities are translated into U. S. dollars using the current exchange rate at the end of each fiscal period. Revenues and expenses are translated using the average exchange rates prevailing throughout the respective periods. All transaction gains and losses from the measurement of monetary balance sheet items denominated in Euros are reflected in the statement of operations as appropriate. Translation adjustments are included in accumulated other comprehensive income (loss).
New Accounting Pronouncements, Policy [Policy Text Block]	Recently Issued Accounting Pronouncements In August 2020, the Financial Accounting Standards Board issued ASU 2020-06, Debt - Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity’s Own Equity (Subtopic 815-40) (“ASU 2020-06”) to simplify accounting for certain financial instruments. ASU 2020-06 eliminates the current models that require separation of beneficial conversion and cash conversion features from convertible instruments and simplifies the derivative scope exception guidance pertaining to equity classification of contracts in an entity’s own equity. The new standard also introduces additional disclosures for convertible debt and freestanding instruments that are indexed to and settled in an entity’s own equity. ASU 2020-06 amends the diluted earnings per share guidance, including the requirement to use the if-converted method for all convertible instruments. ASU 2020-06 was effective for the Company on January 1, 2024 and should be applied on a full or modified retrospective basis. The adoption of ASU 2016-13 did not have a material effect on the consolidated financial statements of the Company. Management does not believe that any other recently issued, but not yet effective, accounting standard, if currently adopted, would have a material effect on the accompanying consolidated financial statements.

Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2025

Basis of Accounting, Policy [Policy Text Block]

Basis of Presentation

The accompanying unaudited interim condensed consolidated financial statements include the accounts of BIO-key International, Inc. and its wholly-owned subsidiaries (collectively, the “Company” or “BIO-key”) and are stated in conformity with accounting principles generally accepted in the United States of America (“GAAP”), pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”). The operating results for interim periods are not necessarily indicative of results that may be expected for any other interim period or for the full year. Pursuant to such rules and regulations, certain financial information and footnote disclosures normally included in the financial statements have been condensed or omitted. Intercompany accounts and transactions have been eliminated in consolidation.

In the opinion of management, the accompanying unaudited interim consolidated financial statements contain all necessary adjustments, consisting only of those of a recurring nature, and disclosures to present fairly the Company’s financial position and the results of its operations and cash flows for the periods presented. The balance sheet at March 31, 2025 was derived from the audited financial statements, but does not include all of the disclosures required by GAAP. These unaudited interim condensed consolidated financial statements should be read in conjunction with the financial statements and the related notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2024, filed with the SEC on June 5, 2024.

Foreign Currency Transactions and Translations Policy [Policy Text Block]

Foreign Currencies

The Company accounts for foreign currency transactions pursuant to ASC 830, Foreign Currency Matters ("ASC 830”). The functional currency of the Company is the U.S. dollar, which is the currency of the primary economic environment in which it operates. In accordance with ASC 830, all assets and liabilities are translated into U. S. dollars using the current exchange rate at the end of each fiscal period. Revenues and expenses are translated using the average exchange rates prevailing throughout the respective periods. All transaction gains and losses from the measurement of monetary balance sheet items denominated in Euros are reflected in the statement of operations as appropriate. Translation adjustments are included in accumulated other comprehensive income (loss).

New Accounting Pronouncements, Policy [Policy Text Block]

Recently Issued Accounting Pronouncements

In August 2020, the Financial Accounting Standards Board issued ASU 2020-06, Debt - Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity’s Own Equity (Subtopic 815-40) (“ASU 2020-06”) to simplify accounting for certain financial instruments. ASU 2020-06 eliminates the current models that require separation of beneficial conversion and cash conversion features from convertible instruments and simplifies the derivative scope exception guidance pertaining to equity classification of contracts in an entity’s own equity. The new standard also introduces additional disclosures for convertible debt and freestanding instruments that are indexed to and settled in an entity’s own equity. ASU 2020-06 amends the diluted earnings per share guidance, including the requirement to use the if-converted method for all convertible instruments. ASU 2020-06 was effective for the Company on January 1, 2024 and should be applied on a full or modified retrospective basis. The adoption of ASU 2016-13 did not have a material effect on the consolidated financial statements of the Company.

Management does not believe that any other recently issued, but not yet effective, accounting standard, if currently adopted, would have a material effect on the accompanying consolidated financial statements.