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Business Segments and Geographic Information - Summary of Revenue from External Customers (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Revenues	$ 59,755	$ 49,775
United States [Member]
Segment Reporting Information [Line Items]
Revenues	58,347	47,942
Canada [Member]
Segment Reporting Information [Line Items]
Revenues	1,019	1,264
India and Other [Member]
Segment Reporting Information [Line Items]
Revenues	$ 389	$ 569

X

- 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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