XML 22 R9.htm IDEA: XBRL DOCUMENT
v3.22.4

Allowance for Doubtful Accounts | 12 Months Ended
--- | ---
Dec. 31, 2022
Allowance for Doubtful Accounts |
Allowance For Doubtful Accounts | 3. Allowance for Doubtful Accounts Changes in the allowance for doubtful accounts are composed of the following:
|  | Years Ended December 31, |
|  | 2022 |  |  | 2021 |
Balance, beginning of year |  | $ | 50 |  |  | $ | 50 |
Provision for doubtful accounts |  |  | 170 |  |  |  | — |
Uncollectible accounts written off |  |  | (170 | ) |  |  | — |
Balance, end of year |  | $ | 50 |  |  | $ | 50 |

X
- Definition Custom Element + References No definition available. + Details
Name: | bkti_AllowanceForDoubtfulAccountsTextBlock
Namespace Prefix: | bkti_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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