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Summary of Significant Accounting Policies - Geographical Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) segment	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of operating segments | segment	1
Number of reportable segments | segment	1
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 252,628	$ 280,615	$ 291,670
Property and equipment, net	4,582	6,979
Domestic
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	200,086	225,433	228,639
Property and equipment, net	2,997	4,115
Foreign
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	52,542	55,182	$ 63,031
Property and equipment, net	$ 1,585	$ 2,864

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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