Outstanding Loans and Security Agreements - Schedule of Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Unpaid Principal Balance	$ 409,191	$ 419,083
Current portion of debt	24,406	26,023
Long-term portion of debt	377,946	385,556
Total	402,352	411,579
Unused Borrowing Capacity	409,191
Notes \| 10.25% Senior Secured Notes due March 2027
Debt Instrument [Line Items]
Unpaid Principal Balance	57,645	61,653
Current portion of debt	12,971	12,716
Long-term portion of debt	44,058	48,244
Total	57,029	$ 60,960
Unused Borrowing Capacity	$ 57,645
Interest rate percentage	10.25%	10.25%
Senior Secured Notes \| 2.5% Green Convertible Senior Notes due August 2025
Debt Instrument [Line Items]
Unpaid Principal Balance	$ 230,000	$ 230,000
Current portion of debt	0	0
Long-term portion of debt	225,324	224,832
Total	225,324	$ 224,832
Unused Borrowing Capacity	$ 230,000
Interest rate percentage	2.50%	2.50%
Senior Secured Notes \| 3.04% Senior Secured Notes due June 30, 2031
Debt Instrument [Line Items]
Unpaid Principal Balance	$ 121,546	$ 127,430
Current portion of debt	11,435	13,307
Long-term portion of debt	108,564	112,480
Total	119,999	$ 125,787
Unused Borrowing Capacity	$ 121,546
Interest rate percentage	3.04%	3.04%
Recourse Debt
Debt Instrument [Line Items]
Unpaid Principal Balance	$ 287,645	$ 291,653
Current portion of debt	12,971	12,716
Long-term portion of debt	269,382	273,076
Total	282,353	285,792
Unused Borrowing Capacity	287,645
Non-recourse Debt
Debt Instrument [Line Items]
Unpaid Principal Balance	121,546	127,430
Current portion of debt	11,435	13,307
Long-term portion of debt	108,564	112,480
Total	119,999	$ 125,787
Unused Borrowing Capacity	$ 121,546

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt classified as noncurrent. Excludes lease obligation.

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