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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, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenue from External Customer [Line Items]
Total	$ 47,779	$ 63,150	$ 155,046	$ 185,022
United States [Member]
Revenue from External Customer [Line Items]
Total	46,778	61,704	151,798	180,519
Canada [Member]
Revenue from External Customer [Line Items]
Total	627	1,038	2,159	3,187
India and other [Member]
Revenue from External Customer [Line Items]
Total	$ 374	$ 408	$ 1,089	$ 1,316

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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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 924
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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Reference 11: http://www.xbrl.org/2003/role/disclosureRef
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