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Income Taxes (Schedule Of Roll Forward Of Valuation Allowance For Deferred Income Tax Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Taxes
Valuation Allowance, Balance at beginning of year	$ 3,323	$ 4,378	$ 22,348
Charged to Costs and Expenses	26	51	(17,970)
Other Adjustments	(2,635)	(1,106)
Valuation Allowance, Balance at end of period	$ 714	$ 3,323	$ 4,378

X

- Definition

Deferred Tax Assets Valuation Allowance, Charged (Credited) To Costs And Expenses

+ References

No definition available.

+ Details

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Namespace Prefix:	clar_
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Balance Type:	debit
Period Type:	duration

X

- Definition

Deferred Tax Assets, Valuation Allowance, Other Adjustments

+ References

No definition available.

+ Details

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Namespace Prefix:	clar_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482685/740-10-50-2

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

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