REPORTABLE SEGMENTS AND GEOGRAPHIC INFORMATION - Narrative (Details) $ in Thousands	3 Months Ended
Mar. 31, 2026 segment	Mar. 31, 2025 USD ($)
Revenue, Major Customer [Line Items]
Number of operating segments \| segment	3
Number of reportable segments \| segment	3
RNG fuel
Revenue, Major Customer [Line Items]
Segment reporting other corporate expenses reclassified		$ 2,292
Fuel Station Services
Revenue, Major Customer [Line Items]
Segment reporting other corporate expenses reclassified		336
Renewable Power
Revenue, Major Customer [Line Items]
Segment reporting other corporate expenses reclassified		$ 962

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 49
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-49

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-18

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