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Note D - Factoring - Due From Factor (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Original Invoice Value	$ 241,715	$ 233,005
Factored amount	181,262	122,064
Balance due from factor	$ 60,453	$ 110,941

X

- Definition

Factored accounts receivable factored amount.

+ References

No definition available.

+ Details

Name:	bkyi_FactoredAccountsReceivableFactoredAmount
Namespace Prefix:	bkyi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Factored accounts receivable original invoice value.

+ References

No definition available.

+ Details

Name:	bkyi_FactoredAccountsReceivableOriginalInvoiceValue
Namespace Prefix:	bkyi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount, after allowance, receivable from customers, clients, or other third-parties, and receivables classified as other due within one year or the normal operating cycle, if longer.

+ References

No definition available.

+ Details

Name:	us-gaap_AccountsAndOtherReceivablesNetCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant