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v3.26.1

Note I - Accrued Liabilities (Details Textual) | 12 Months Ended
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Dec. 31, 2025 USD ($)
Increase (Decrease) in Accrued Salaries | $ 161,000
Increase (Decrease) in Accrued Employee Reimbursement | 9,000
Increase (Decrease) in Vacation Time Accrual Expense | 46,000
Increase (Decrease) in Professional Fees | 25,000
Increase (Decrease) in Sales Tax Payable | 9,000
Increase (Decrease) in Other Accrued Liabilities | $ 157,000

X
- Definition The increase (decrease) in the accrued employee reimbursement. + References No definition available. + Details
Name: | bkyi_IncreaseDecreaseInAccruedEmployeeReimbursement
Namespace Prefix: | bkyi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The increase (decrease) in the professional fees. + References No definition available. + Details
Name: | bkyi_IncreaseDecreaseInProfessionalFees
Namespace Prefix: | bkyi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The increase (decrease) in the sales tax payable. + References No definition available. + Details
Name: | bkyi_IncreaseDecreaseInSalesTaxPayable
Namespace Prefix: | bkyi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The increase (decrease) in the vacation time accrual expense. + References No definition available. + Details
Name: | bkyi_IncreaseDecreaseInVacationTimeAccrualExpense
Namespace Prefix: | bkyi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The increase (decrease) during the period in accrued salaries. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (a) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The increase (decrease) during the reporting period in other expenses incurred but not yet paid. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (a) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration