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Note I - Accrued Liabilities (Details Textual)	12 Months Ended
	Dec. 31, 2024 USD ($)
Increase (Decrease) in Accrued Salaries	$ 223,000
Increase (Decrease) in Accrued Employee Reimbursement	30,000
Increase (Decrease) in Vacation Time Accrual Expense	(28,000)
Increase (Decrease) in Professional Fees	(104,000)
Increase (Decrease) Accrued Franchise Taxes	(97,000)
Increase (Decrease) in Sales Tax Payable	(1,135)
Increase (Decrease) in Other Accrued Liabilities	$ (50,000)

X

- Definition

The increase (decrease) in accrued franchise taxes.

+ References

No definition available.

+ Details

Name:	bkyi_IncreaseDecreaseAccruedFranchiseTaxes
Namespace Prefix:	bkyi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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

Name:	us-gaap_IncreaseDecreaseInAccruedSalaries
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

Name:	us-gaap_IncreaseDecreaseInOtherAccruedLiabilities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration