Condensed Consolidated Statements of Stockholders' Equity (Deficit) (Unaudited) (Parenthetical)	Mar. 16, 2021
Sponsors
Percentage of 2020 sponsor earnout shares that have not vested been forfeited.	50.00%

Percentage of two thousand twenty sponsor earnout shares that have not vested been forfeited.

No definition available.

Name:	klr_PercentageOfTwoThousandTwentySponsorEarnoutSharesThatHaveNotVestedBeenForfeited
Namespace Prefix:	klr_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration