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Significant Transactions (Details Textual)	Mar. 31, 2023 shares
Business Acquisition [Line Items]
Exchangeable shares	640
Underwriter Warrants [Member]
Business Acquisition [Line Items]
Exchangeable shares	108,696

X

- Definition

The number of exchangeable shares.

+ References

No definition available.

+ Details

Name:	kern_ExchangeableShares
Namespace Prefix:	kern_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_BusinessAcquisitionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=kern_UnderwriterWarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: