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Stockholders' Equity - Additional Information (Details) - Common Stock $ in Millions	Feb. 27, 2025 USD ($)
Stockholders Equity [Line Items]
Share repurchase program, duration	3 years
Share repurchase program, authorized amount	$ 250.0

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- Definition

Stockholders' equity.

+ References

No definition available.

+ Details

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Namespace Prefix:	cars_
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- Definition

Amount authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481520/505-30-50-4

+ Details

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- Definition

Period share may be purchased under authorized share repurchase plan, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, repurchase of stock and unit of ownership.

+ References

No definition available.

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