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Earnings (Losses) Per Share (Details) | 6 Months Ended
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Jun. 30, 2021 shares
Earnings Per Share [Abstract] |
Diluted earnings per share anti-dilutive effect | 47,663

X
- Definition Diluted earnings per share anti-dilutive effect. + References No definition available. + Details
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Namespace Prefix: | krnt_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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