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Related Party Transactions - Schedule of Revenue Earned From Related Parties (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Related Party Transaction [Line Items]
Total revenue	$ 7,330	$ 5,680	$ 20,760	$ 15,899
Related party
Related Party Transaction [Line Items]
Total revenue	5,957	4,673	16,030	13,469
Commercial
Related Party Transaction [Line Items]
Total revenue	$ 1,373	$ 1,007	$ 4,730	$ 2,430

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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.

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