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CONCENTRATION OF CREDIT RISK AND MAJOR CUSTOMERS - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Concentration Risk [Line Items]
Receivables related to contracts with customers	$ 179,547	$ 116,119
NRG Business
Concentration Risk [Line Items]
Revenue from contracts with customers	132,935	165,465	$ 453,501
Citadel Energy Marketing LLC
Concentration Risk [Line Items]
Revenue from contracts with customers	134,909	180,039
Accounts Receivable \| Customer Concentration Risk
Concentration Risk [Line Items]
Receivables related to contracts with customers	179,547	116,119
Accounts Receivable \| Customer Concentration Risk \| NRG Business
Concentration Risk [Line Items]
Receivables related to contracts with customers	$ 15,018	13,416
Accounts Receivable \| Customer Concentration Risk \| DTE Energy
Concentration Risk [Line Items]
Receivables related to contracts with customers		$ 11,611
Revenue from Contract with Customer Benchmark \| Customer Concentration Risk \| NRG Business
Concentration Risk [Line Items]
Percentage of revenue (more than)	10.00%	10.00%	10.00%
Revenue from Contract with Customer Benchmark \| Customer Concentration Risk \| Citadel Energy Marketing LLC
Concentration Risk [Line Items]
Percentage of revenue (more than)	10.00%		10.00%