Revenues - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Disaggregation Of Revenue [Line Items]
Total revenues	$ 22,429	$ 29,439	$ 73,204	$ 90,797
Subscription
Disaggregation Of Revenue [Line Items]
Total revenues	21,182	27,238	67,794	84,015
Advisory
Disaggregation Of Revenue [Line Items]
Total revenues	348	1,123	1,724	3,345
Advertising
Disaggregation Of Revenue [Line Items]
Total revenues	282	437	1,237	1,259
Books
Disaggregation Of Revenue [Line Items]
Total revenues	1	39	7	220
Other Revenue
Disaggregation Of Revenue [Line Items]
Total revenues	$ 616	$ 602	$ 2,442	$ 1,958

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

- Definition

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