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Related Party Transactions - Schedule of Revenue Earned From Related Parties (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Related Party Transaction [Line Items]
Total revenue	$ 8,317	$ 6,966
Related party
Related Party Transaction [Line Items]
Total revenue	6,939	5,484
Commercial
Related Party Transaction [Line Items]
Total revenue	$ 1,378	$ 1,482

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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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