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v3.22.4

Inventories Net (Details 1) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Inventories net |  |
Balance,beginning of year | $ 1,288 | $ 588
Charged to cost of sales | 81 | 700
Disposal of inventory | (122) | 0
Balance,beginning of year | $ 1,247 | $ 1,288

X
- References No definition available. + Details
Name: | bkti_DisposalOfInventory
Namespace Prefix: | bkti_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | bkti_InventoryAmountInCostOfSales
Namespace Prefix: | bkti_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | bkti_SlowmovingExcessObsoleteInventory
Namespace Prefix: | bkti_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_InventoryDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration