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Property And Equipment (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Property And Equipment. |  |  |
Depreciation expense continuing operations | $ 4,150 | $ 4,388 | $ 3,352

X
- Definition Amount of deprecation expense attributable to property, plant and equipment of continued operations. + References No definition available. + Details
Name: | clar_DepreciationContinuedOperations
Namespace Prefix: | clar_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration