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Derivatives and Hedging Activities (Details) - USD ($) $ in Thousands | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2022 | Dec. 31, 2021 | Jun. 30, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract] |  |  |
Fair value of outstanding forward and option | $ 2,401 | $ 317 |
Pretax income from derivatives designated in cash flow hedging relationships | 365 |  | $ 7
Estimated net amount of existing gains reported in accumulated other comprehensive income | $ 1,893 |  |

X
- Definition Pretax income from derivatives designated in cash flow hedging relationships. + References No definition available. + Details
Name: | krnt_CashFlowHedgesDerivativeInstrumentsPretaxIncome
Namespace Prefix: | krnt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Estimated net amount of the existing gains that are reported in accumulated other comprehensive income at the reporting date that is expected to be reclassified into earnings within the next 12 months. + References No definition available. + Details
Name: | krnt_ExistingGainsEstimatedNetAmountReportedInAccumulatedOtherComprehensiveIncome
Namespace Prefix: | krnt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Fair vlaue of option and forward. + References No definition available. + Details
Name: | krnt_FairVlaueOfOptionAndForward
Namespace Prefix: | krnt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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