Summary of Significant Accounting Policies (Details)						3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 23, 2023 shares	Aug. 24, 2023 USD ($)	Jun. 01, 2023 USD ($)	May 16, 2023 USD ($)	Mar. 20, 2023 USD ($) shares	Sep. 30, 2023 USD ($) customer shares	Sep. 30, 2022 customer	Sep. 30, 2023 USD ($) customer shares	Sep. 30, 2022 customer	Dec. 31, 2022 USD ($) customer shares	Aug. 31, 2023
Property, Plant and Equipment [Line Items]
Long-term debt						$ 841,975,000		$ 841,975,000		$ 411,579,000
Preferred stock, issued (in shares) | shares					13,491,701	0		0
Preferred stock, outstanding (in shares) | shares					13,491,701					0
Sales Revenue, Net | Customer Concentration Risk
Property, Plant and Equipment [Line Items]
Number of customers | customer						2	2	2	2
Sales Revenue, Net | Customer Concentration Risk | Customer One
Property, Plant and Equipment [Line Items]
Concentration risk, percentage						40.00%	54.00%	36.00%	48.00%
Sales Revenue, Net | Customer Concentration Risk | Customer Two
Property, Plant and Equipment [Line Items]
Concentration risk, percentage						31.00%	26.00%	24.00%	16.00%
Accounts Receivable | Customer Concentration Risk
Property, Plant and Equipment [Line Items]
Number of customers | customer								2		1
Accounts Receivable | Customer Concentration Risk | Customer One
Property, Plant and Equipment [Line Items]
Concentration risk, percentage								72.00%		75.00%
Accounts Receivable | Customer Concentration Risk | Customer Two
Property, Plant and Equipment [Line Items]
Concentration risk, percentage								18.00%
Asia Pacific | Sales Revenue, Net | Geographic Concentration Risk
Property, Plant and Equipment [Line Items]
Concentration risk, percentage						35.00%	58.00%	24.00%	61.00%
3% Green Convertible Senior Notes due June 2028
Property, Plant and Equipment [Line Items]
Debt instrument, unamortized discount						$ 7,200,000		$ 7,200,000
Debt other issuance costs, net						1,500,000		1,500,000
Redemption price, percentage				130.00%
10.25% Senior Secured Notes due March 2027
Property, Plant and Equipment [Line Items]
Interest rate			10.25%
Proceeds from debt, net of issuance costs			$ 60,900,000
Redemption price, percentage			104.00%
3.04% Senior Secured Notes due June 30, 2031
Property, Plant and Equipment [Line Items]
Interest rate		3.04%
SK Ecoplant | Series B preferred
Property, Plant and Equipment [Line Items]
Conversion of shares (in shares) | shares	13,491,701
SK Ecoplant
Property, Plant and Equipment [Line Items]
Total purchase price					$ 310,500,000
SK Ecoplant | Second Tranche Closing
Property, Plant and Equipment [Line Items]
Total purchase price					$ 311,000,000
Recourse Debt
Property, Plant and Equipment [Line Items]
Long-term debt						840,492,000		840,492,000		$ 285,792,000
Senior Secured Notes | 3% Green Convertible Senior Notes due June 2028
Property, Plant and Equipment [Line Items]
Long-term debt						$ 614,183,000		$ 614,183,000
Interest rate				3.00%		3.00%		3.00%
Debt face amount				$ 632,500,000
Debt instrument, unamortized discount				15,800,000		$ 4,700,000		$ 4,700,000
Debt other issuance costs, net				4,000,000		$ 1,000,000		$ 1,000,000
Proceeds from debt, net of issuance costs				$ 612,700,000
Senior Secured Notes | 10.25% Senior Secured Notes due March 2027
Property, Plant and Equipment [Line Items]
Long-term debt										$ 60,960,000
Interest rate						10.25%		10.25%		10.25%
Senior Secured Notes | 3.04% Senior Secured Notes due June 2031
Property, Plant and Equipment [Line Items]
Interest rate						3.04%		3.04%
Senior Secured Notes | 3.04% Senior Secured Notes due June 2031 | PPA Company 5
Property, Plant and Equipment [Line Items]
Interest rate											3.04%
Repayments of debt		$ 118,500,000
Accrued interest		$ 500,000