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Revenue Recognition (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2022 | Dec. 31, 2021
Revenue Recognition [Abstract] |  |
Contract liabilities | $ 3,768 | $ 5,564
Recognized revenues | 1,583 |
Provision for returns | $ 1,749 | $ 2,178

X
- Definition Amount of Contract liabilities. + References No definition available. + Details
Name: | krnt_ContractLiabilities
Namespace Prefix: | krnt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition Recognized revenues. + References No definition available. + Details
Name: | krnt_RecognizedRevenues
Namespace Prefix: | krnt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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