Segment Reporting - Schedule of Revenues Disaggregated by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 78,115	$ 94,581	$ 152,628	$ 179,498
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	75,207	91,215	146,894	172,897
Other countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 2,908	$ 3,366	$ 5,734	$ 6,601

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details

System1, Inc. 10-Q