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Note C - Factoring - Due From Factor (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Original invoice value	$ 221,120	$ 423,349
Factored amount	164,438	313,484
Factored balance due	$ 56,682	$ 109,865

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