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Nature of Business, Liquidity and Basis of Presentation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		12 Months Ended
	Oct. 23, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Nov. 30, 2021	Aug. 31, 2020
Subsidiary, Sale of Stock [Line Items]
Long-term debt		$ 526,730	$ 390,899
Non-recourse debt, non-current		500,899	270,053
Comprehensive loss		$ (178,721)	$ (186,006)	$ (329,537)
Revision of Prior Period, Error Correction, Adjustment
Subsidiary, Sale of Stock [Line Items]
Comprehensive loss				$ 5,800
Series A Redeemable Convertible Preferred Stock \| SK Ecoplant \| Initial Investment
Subsidiary, Sale of Stock [Line Items]
Shares sold in offering (in shares)	10,000
Temporary equity, par value (in dollars per share)	$ 0.0001
Offering price per share (in dollars per share)	$ 25.50
Net proceeds from stock offering	$ 255,000
Sales Revenue, Net \| Customer Concentration Risk \| Customer One
Subsidiary, Sale of Stock [Line Items]
Concentration risk, percentage		43.00%	34.00%
Sales Revenue, Net \| Customer Concentration Risk \| Customer Two
Subsidiary, Sale of Stock [Line Items]
Concentration risk, percentage		11.00%	28.00%
Accounts Receivable \| Customer Concentration Risk \| SK Ecoplant
Subsidiary, Sale of Stock [Line Items]
Concentration risk, percentage		60.00%	56.00%
Asia Pacific \| Sales Revenue, Net \| Geographic Concentration Risk
Subsidiary, Sale of Stock [Line Items]
Concentration risk, percentage		38.00%	35.00%
Recourse debt
Subsidiary, Sale of Stock [Line Items]
Long-term debt		$ 291,831	$ 168,008
Non-recourse debt, non-current		283,483	$ 168,008
Senior secured notes \| 3.04% Senior Secured Notes due June 2031
Subsidiary, Sale of Stock [Line Items]
Interest Rate			3.04%
Senior secured notes \| 3.04% Senior Secured Notes due June 2031 \| PPA Company 5
Subsidiary, Sale of Stock [Line Items]
Debt face amount					$ 136,000
Senior secured notes \| 3.04% Senior Secured Notes due June 2031 \| PPA Company 3a
Subsidiary, Sale of Stock [Line Items]
Interest Rate					3.04%
Senior secured notes \| 2.5% Green Convertible Senior Notes due August 2025
Subsidiary, Sale of Stock [Line Items]
Long-term debt		222,863	$ 99,394
Non-recourse debt, non-current		$ 222,863	$ 99,394
Interest Rate		2.50%	2.50%			2.50%