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Note 9 - Prepaid Expenses and Other (Details Textual) $ in Millions	Jun. 30, 2021 USD ($)
Prepaid Deposit for Hardware Devices [Member]	$ 1.4

X

- Definition

Represents prepaid deposit for hardware devices.

+ References

No definition available.

+ Details

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