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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Derivative [Line Items]
Cost and estimated earnings in excess of billings	$ 5,140		$ 5,140		$ 6,489
Revenue recognized included in contract liabilities			3,510	$ 3,404
Revenue remaining performance obligation	32,653		$ 32,653
Accounts Payable \| Supplier Concentration Risk \| One Vendor
Derivative [Line Items]
Concentration risk, percentage				13.00%
Two Customer \| Revenue Benchmark \| Customer Concentration Risk
Derivative [Line Items]
Concentration risk, percentage			42.00%
Four Customer \| Revenue Benchmark \| Customer Concentration Risk
Derivative [Line Items]
Concentration risk, percentage					63.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-07-01
Derivative [Line Items]
Revenue remaining performance obligation	$ 12,068		$ 12,068
Revenue remaining performance obligation period	12 months		12 months
Fuel Station Services
Derivative [Line Items]
Environmental credits held for sale	$ 1,992	$ 4,693	$ 4,202	$ 10,540
Impairment charges	547
Renewable Power Segment
Derivative [Line Items]
Impairment charges	$ 3,595