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COMMITMENTS AND CONTINGENCIES - Narrative (Details) - USD ($)		3 Months Ended	9 Months Ended
	Mar. 30, 2026	Mar. 31, 2026	Sep. 30, 2026	Dec. 31, 2025
Line of Credit Facility [Line Items]
Proceeds from investment tax credit	$ 10,775,000
Guarantor obligations, maximum exposure, percent	50.00%
Estimated loss per contract			$ 4,948,000
Estimated loss from claim			1,984,000
Estimate of possible loss, subcontractors			3,141,000
Athene Annuity And Life Company and Athene Annuity Re II Ltd. \| Land2Gas LLC
Line of Credit Facility [Line Items]
Investment tax credit, purchase agreement	$ 22,926,000
Proceeds from investment tax credit	$ 21,550,000
V E C Partners Inc Dba C E I Builders C E I \| M D Digester L L C
Line of Credit Facility [Line Items]
Estimated loss per contract			14,000
Land2Gas LLC
Line of Credit Facility [Line Items]
Percentage of ownership	50.00%
Standby Letters of Credit
Line of Credit Facility [Line Items]
Standby letters of credit outstanding balance			40,174,000	$ 15,504,000
Draws on standby letters of credit		$ 0	$ 0