Revenue by Product - Schedule of Revenue Disaggregated by Product (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 213,212	$ 175,518	$ 144,496
System solutions
Disaggregation of Revenue [Line Items]
Revenue	155,818	116,720	74,207
Solar components
Disaggregation of Revenue [Line Items]
Revenue	$ 57,394	$ 58,798	$ 70,289

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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+ Details