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Note 6 - Factoring - Due From Factor (Details) - USD ($) | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Original invoice value | $ 266,386 | $ 221,120
Factored amount | (215,684) | (164,438)
Balance due from factor | $ 50,702 | $ 56,682

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