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Revenue from Contracts with Customers - Summary of Revenue from External Customers (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenue from External Customer [Line Items]
Total revenues	$ 63,150	$ 59,531	$ 185,022	$ 162,964
United States [Member]
Revenue from External Customer [Line Items]
Total revenues	61,704	57,682	180,519	157,156
Canada [Member]
Revenue from External Customer [Line Items]
Total revenues	1,038	988	3,187	3,270
India and Other [Member]
Revenue from External Customer [Line Items]
Total revenues	$ 408	$ 861	$ 1,316	$ 2,538

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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.

+ References

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