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Condensed Consolidated Statements of Convertible Preferred Stock and Stockholders' Equity (unaudited) (Parenthetical) $ in Thousands	3 Months Ended
	Jun. 30, 2024 USD ($)
Unrealized Gain On Investments Net Of Tax	$ 0

X

- Definition

Unrealized Gain On Investments Net Of Tax

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No definition available.

+ Details

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Namespace Prefix:	krro_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration