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Note A - The Company and Summary of Significant Accounting Policies (Details) (USD $) | 12 Months Ended | 0 Months Ended |
--- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Feb. 03, 2015 | Dec. 31, 2012
Note A - The Company and Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |
Retained Earnings (Accumulated Deficit) | $ (56,754,144)us-gaap_RetainedEarningsAccumulatedDeficit | $ (54,870,572)us-gaap_RetainedEarningsAccumulatedDeficit |  |
Cash and Cash Equivalents, at Carrying Value | 843,632 us-gaap_CashAndCashEquivalentsAtCarryingValue | 2,023,349 us-gaap_CashAndCashEquivalentsAtCarryingValue |  | 83,989 us-gaap_CashAndCashEquivalentsAtCarryingValue
Operational Costs Per Month | 475,000 bkyi_OperationalCosts |  |  |
Advertising Expense | 252,000 us-gaap_AdvertisingExpense | 178,000 us-gaap_AdvertisingExpense |  |
Allocated Share-based Compensation Expense | $ 207,258 us-gaap_AllocatedShareBasedCompensationExpense | $ 81,642 us-gaap_AllocatedShareBasedCompensationExpense |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares) | 1,835,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross | 1,175,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross |  |
Subsequent Event [Member] | Reverse Stock Split [Member] |  |  |  |
Note A - The Company and Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |
Stockholders' Equity Note, Stock Split, Conversion Ratio |  |  | 2 us-gaap_StockholdersEquityNoteStockSplitConversionRatio1 / us-gaap_NonmonetaryTransactionTypeAxis = bkyi_ReverseStockSplitMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
Minimum [Member] |  |  |  |
Note A - The Company and Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 3 years |  |  |
Maximum [Member] |  |  |  |
Note A - The Company and Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 4 years |  |  |

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