Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Revenues, Total	$ 344,638	$ 327,516	$ 297,610
Review Service Revenue
Disaggregation of Revenue [Line Items]
Revenue for review services recognized under ASC 606	202,253	188,265	167,278
Indemnification Service Revenue
Disaggregation of Revenue [Line Items]
Revenue for indemnification guarantees recognized under ASC 460	$ 142,385	$ 139,251	$ 130,332
Revenue Benchmark \| Product Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%
Revenue Benchmark \| Product Concentration Risk \| Review Service Revenue
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	59.00%	57.00%	56.00%
Revenue Benchmark \| Product Concentration Risk \| Indemnification Service Revenue
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	41.00%	43.00%	44.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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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- 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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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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+ Details