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v3.22.1

Allowance for Doubtful Accounts (Tables) | 12 Months Ended
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Dec. 31, 2021
Allowance for Doubtful Accounts (Tables) |
Schedule Of Allowance For Doubtful Accounts |
|  | Years Ended December 31, |
|  | 2021 |  |  | 2020 |
Balance, beginning of year |  | $ | 50 |  |  | $ | 50 |
Provision for doubtful accounts |  |  | - |  |  |  | - |
Uncollectible accounts written off |  |  | - |  |  |  | - |
Balance, end of year |  | $ | 50 |  |  | $ | 50 |

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- References No definition available. + Details
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Namespace Prefix: | bkti_
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Balance Type: | na
Period Type: | duration

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