Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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+ Details

Related Party Transactions - Additional Information (Details)		3 Months Ended		9 Months Ended
	Jul. 01, 2021 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)
Related Party Transaction [Line Items]
Total revenue from related parties		$ 3,333,000	$ 742,000	$ 8,227,000	$ 2,672,000
Softbank Corp.
Related Party Transaction [Line Items]
Interest acquired	0.50
Related party amount of transaction	$ 2,000,000
Related party amounts of transaction, subject to earn out	$ 3,600,000
Total revenue from related parties			700,000	1,600,000	2,700,000
SK Ecoplant
Related Party Transaction [Line Items]
Total revenue from related parties		3,300,000	$ 0	6,600,000	$ 0
Accounts receivable		3,600,000		3,600,000
Equity Method Investee \| Softbank Corp.
Related Party Transaction [Line Items]
Accounts receivable		$ 0		$ 0