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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