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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Offering costs		$ 384
Issuance of preferred stock-net of issuance costs	$ 62
Series G preferred shares
Issuance of preferred stock-net of issuance costs	$ 62

X

- Definition

The cash outflow for cost incurred directly with the issuance of a follow-on offering of stock.

+ References

No definition available.

+ Details

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Period Type:	duration

X

- Definition

The cash outflow for cost incurred directly with the issuance of temporary equity.

+ References

No definition available.

+ Details

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

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: