Credits netted against the aggregate expenses charged against earnings to allocate the cost of intangible assets.

No definition available.

Name:	bkyi_AmortizationOfIntangibleAssetsCredits
Namespace Prefix:	bkyi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents cumulative amount of amortization expense net of credit expense.

+ References

No definition available.

+ Details

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

- Definition

Represents the amount of current and noncurrent software license rights as of the balance sheet date.

+ References

No definition available.

+ Details

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

- Definition

Carrying amounts as of the balance sheet date of software license rights classified as current.

+ References

No definition available.

+ Details

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

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274

+ Details

Name:	us-gaap_AmortizationOfIntangibleAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash outflow to acquire asset without physical form usually arising from contractual or other legal rights, excluding goodwill.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585

+ Details

Name:	us-gaap_PaymentsToAcquireIntangibleAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow associated with the acquisition from vendors of software programs or applications for internal use (that is, not to be sold, leased or otherwise marketed to others) that qualify for capitalization.

+ References

+ Details

Name:	us-gaap_PaymentsToAcquireSoftware
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=bkyi_SoftwareLicenseRightsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=bkyi_The2015SoftwareLicenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Note G - Resalable Software Licenses Rights (Details Textual) - USD ($)			12 Months Ended		24 Months Ended
	Dec. 31, 2015	Nov. 11, 2015	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018
Payments to Acquire Intangible Assets			$ 30,398	$ 60,698
Software License Rights, Current			1,125,000	2,640,000	$ 1,125,000
Amortization of Intangible Assets, Total			15,596	13,726
Software License Rights			7,915,610	$ 10,573,808	7,915,610
Software License Rights [Member]
Payments to Acquire Intangible Assets		$ 12,000,000
Software License Rights, Current		$ 1,125,000
Finite-Lived Intangible Asset, Useful Life				10 years
Amortization of Intangible Assets, Total			2,640,000	$ 1,556,687	4,198,596
Software License Rights			7,801,404		7,801,404
The 2015 Software License [Member]
Amortization of Intangible Assets, Total			18,198	$ 35,916
Software License Rights			114,206		$ 114,206
Payments to Acquire Software	$ 180,000
Amortization of Intangible Assets, Credits			14,400
Cumulative Amount of Amortization Expense, Net of Credits			$ 65,794