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Note 6 - Factoring - Fees (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Factoring fees	$ 52,797	$ 91,523

X

- Definition

The cost of factoring related to accounts receivable.

+ References

No definition available.

+ Details

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