DEBT - Schedule of Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Total debt principal	$ 622,298	$ 685,000
Less: unamortized discount	(74,972)	(82,723)
Total debt	547,326	602,277
Less: current portion	120,096	94,367
Noncurrent portion	427,230	507,910
Related party
Debt Instrument [Line Items]
Less: current portion	74,000	51,500
Senior notes \| Trina Solar AG Note
Debt Instrument [Line Items]
Total debt principal	150,000	150,000
Loans payable \| Trina Solar (U.S.), Inc. Production Reserve Fee
Debt Instrument [Line Items]
Total debt principal	220,000	220,000
Line of credit \| Senior Secured Credit Facility \| Secured debt
Debt Instrument [Line Items]
Total debt principal	205,206	235,000
Convertible debt \| Convertible note - related party \| Related party
Debt Instrument [Line Items]
Total debt principal	$ 47,092	$ 80,000

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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