XML 67 R47.htm IDEA: XBRL DOCUMENT
v3.25.1

Note 8 - Leases (Details Textual) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 USD ($) ft² | Dec. 31, 2023 USD ($) | Feb. 29, 2020 ft²
Industrial Space in West Melbourne, Florida [Member] |  |  |
Area of Real Estate Property (Square Foot) | ft² | 54,000 |  |
Lessee, Operating Lease, Renewal Term (Year) | 5 years |  |
Lessee, Operating Lease, Annual Rental, Maintenance, and Tax Expense | $ | $ 625 | $ 596 |
Office Space at Sawgrass Technology Park [Member] |  |  |
Area of Real Estate Property (Square Foot) | ft² |  |  | 6,857
Lessee, Operating Lease, Annual Rental, Maintenance, and Tax Expense | $ | $ 224 | $ 212 |
Lessee, Operating Lease, Term of Contract (Month) |  |  | 64 months

X
- Definition Amount of annual rental, maintenance, and tax expenses attributable to operating leases. + References No definition available. + Details
Name: | bkti_LesseeOperatingLeaseAnnualRentalMaintenanceAndTaxExpense
Namespace Prefix: | bkti_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Area of a real estate property. + References No definition available. + Details
Name: | us-gaap_AreaOfRealEstateProperty
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-3 + Details
Name: | us-gaap_LesseeOperatingLeaseRenewalTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-3 + Details
Name: | us-gaap_LesseeOperatingLeaseTermOfContract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_LeaseContractualTermAxis=bkti_IndustrialSpaceInWestMelbourneFloridaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LeaseContractualTermAxis=bkti_OfficeSpaceAtSawgrassTechnologyParkMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |