v3.26.1
REPORTABLE SEGMENTS AND GEOGRAPHIC INFORMATION - Segment Reporting Information (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total revenues $ 73,375 $ 85,407  
Cost of sales 53,849 58,637  
Loss from equity method investments 1,757 722  
Interest and financing expense, net 5,884 6,065  
Project development and startup costs 1,815 6,081  
Depreciation, amortization, and accretion 5,613 5,942  
Other corporate expenses 11,008 10,670  
Stock-based compensation 2,055 1,751  
Other segment items 2,696 2,292  
Net loss before income tax benefit (11,302) (6,753)  
Income tax benefit 5,709 8,037  
Net (loss) income (5,593) 1,284  
Investments in other entities [1] 224,282   $ 231,223
Segment assets [1] 1,060,602   959,469
Cash paid for purchases of property, plant and equipment 24,367 11,566  
Intersegment Eliminations      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total revenues 5,173 4,531  
Operating Segments      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total revenues 73,375 85,407  
Cost of sales 53,849 58,637  
Loss from equity method investments 1,757 722  
Interest and financing expense, net 5,884 6,065  
Project development and startup costs 1,815 6,081  
Depreciation, amortization, and accretion 5,613 5,942  
Other corporate expenses 0 0  
Stock-based compensation 0 0  
Other segment items 2,696 2,292  
Net loss before income tax benefit 1,761 5,668  
Investments in other entities 224,282   231,223
Segment assets 912,049   901,581
Cash paid for purchases of property, plant and equipment 24,367 11,566  
Operating Segments | Intersubsegment Eliminations      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total revenues 78,548 89,938  
Corporate      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total revenues 0 0  
Cost of sales 0 0  
Loss from equity method investments 0 0  
Interest and financing expense, net 0 0  
Project development and startup costs 0 0  
Depreciation, amortization, and accretion 0 0  
Other corporate expenses 11,008 10,670  
Stock-based compensation 2,055 1,751  
Other segment items 0 0  
Investments in other entities 0   0
Segment assets 148,553   57,888
Cash paid for purchases of property, plant and equipment 0 0  
Corporate and Eliminations      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total revenues 0 0  
Net loss before income tax benefit (13,063) (12,421)  
RNG fuel      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total revenues [2] 21,638 27,599  
RNG fuel | Intersegment Eliminations      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total revenues 142 138  
RNG fuel | Operating Segments      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total revenues 21,638 27,599  
Cost of sales 12,829 12,153  
Loss from equity method investments 1,757 722  
Interest and financing expense, net 6,335 6,017  
Project development and startup costs 1,815 6,081  
Depreciation, amortization, and accretion 3,093 2,959  
Other corporate expenses 0 0  
Stock-based compensation 0 0  
Other segment items 2,472 1,247  
Net loss before income tax benefit (6,663) (1,580)  
Investments in other entities 224,282   231,223
Segment assets 702,171   675,988
Cash paid for purchases of property, plant and equipment 19,382 4,680  
RNG fuel | Operating Segments | Intersubsegment Eliminations      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total revenues 21,780 27,737  
Fuel Station Services      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total revenues [3] 44,566 50,678  
Fuel Station Services | Intersegment Eliminations      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total revenues 5,031 4,393  
Fuel Station Services | Operating Segments      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total revenues 44,566 50,678  
Cost of sales 35,390 39,722  
Loss from equity method investments 0 0  
Interest and financing expense, net (432) 63  
Project development and startup costs 0 0  
Depreciation, amortization, and accretion 1,558 2,034  
Other corporate expenses 0 0  
Stock-based compensation 0 0  
Other segment items (63) 148  
Net loss before income tax benefit 8,113 8,711  
Investments in other entities 0   0
Segment assets 181,650   196,853
Cash paid for purchases of property, plant and equipment 4,985 6,886  
Fuel Station Services | Operating Segments | Intersubsegment Eliminations      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total revenues 49,597 55,071  
Renewable Power      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total revenues [4] 7,171 7,130  
Renewable Power | Intersegment Eliminations      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total revenues 0 0  
Renewable Power | Operating Segments      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total revenues 7,171 7,130  
Cost of sales 5,630 6,762  
Loss from equity method investments 0 0  
Interest and financing expense, net (19) (15)  
Project development and startup costs 0 0  
Depreciation, amortization, and accretion 962 949  
Other corporate expenses 0 0  
Stock-based compensation 0 0  
Other segment items 287 897  
Net loss before income tax benefit 311 (1,463)  
Investments in other entities 0   0
Segment assets 28,228   $ 28,740
Cash paid for purchases of property, plant and equipment 0 0  
Renewable Power | Operating Segments | Intersubsegment Eliminations      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total revenues $ 7,171 $ 7,130  
[1] Includes amounts related to consolidated VIEs, which are presented separately in the table below.
[2] Includes revenues from related parties of $17,042 and $20,101 for the three months ended March 31, 2026 and 2025, respectively.
[3] Includes revenues from related parties of $13,107 and $16,603 for the three months ended March 31, 2026 and 2025, respectively
[4] Includes revenues from related parties of $872 and $1,166 for the three months ended March 31, 2026 and 2025, respectively.