v3.26.1
REPORTABLE SEGMENTS AND GEOGRAPHIC INFORMATION - Revenue by Major Customer by Reporting Segment (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Revenue, Major Customer [Line Items]    
Total revenues $ 73,375 $ 85,407
Revenue from contracts with customers 67,416 82,966
Revenue from lease arrangements 5,959 2,441
Total revenues (12,032)  
Revenue from contracts with customers (15,550)  
Revenue from lease arrangements 3,518  
Customer A    
Revenue, Major Customer [Line Items]    
Total revenues $ 28,645 $ 36,611
Customer A | Customer Concentration Risk | Revenue Benchmark    
Revenue, Major Customer [Line Items]    
Concentration risk, percentage 39.00% 42.90%
Customer B    
Revenue, Major Customer [Line Items]    
Total revenues $ 7,843 $ 0
Customer B | Customer Concentration Risk | Revenue Benchmark    
Revenue, Major Customer [Line Items]    
Concentration risk, percentage 10.70% 0.00%
RNG fuel    
Revenue, Major Customer [Line Items]    
Total revenues [1] $ 21,638 $ 27,599
Total revenues (5,961)  
RNG fuel | Customer A    
Revenue, Major Customer [Line Items]    
Total revenues $ 16,917 $ 20,101
RNG fuel | Customer A | Customer Concentration Risk | Revenue Benchmark    
Revenue, Major Customer [Line Items]    
Concentration risk, percentage 23.10% 23.50%
Fuel Station Services    
Revenue, Major Customer [Line Items]    
Total revenues [2] $ 44,566 $ 50,678
Total revenues (6,112)  
Fuel Station Services | Customer A    
Revenue, Major Customer [Line Items]    
Total revenues $ 10,856 $ 15,344
Fuel Station Services | Customer A | Customer Concentration Risk | Revenue Benchmark    
Revenue, Major Customer [Line Items]    
Concentration risk, percentage 14.80% 18.00%
Fuel Station Services | Customer B    
Revenue, Major Customer [Line Items]    
Total revenues $ 7,843 $ 0
Fuel Station Services | Customer B | Customer Concentration Risk | Revenue Benchmark    
Revenue, Major Customer [Line Items]    
Concentration risk, percentage 10.70% 0.00%
Renewable Power    
Revenue, Major Customer [Line Items]    
Total revenues [3] $ 7,171 $ 7,130
Total revenues 41  
Renewable Power | Customer A    
Revenue, Major Customer [Line Items]    
Total revenues $ 872 $ 1,166
Renewable Power | Customer A | Customer Concentration Risk | Revenue Benchmark    
Revenue, Major Customer [Line Items]    
Concentration risk, percentage 1.20% 1.40%
Brown gas sales | RNG fuel    
Revenue, Major Customer [Line Items]    
Total revenues $ 2,821 $ 1,457
Total revenues 1,364  
Environmental attributes | RNG fuel    
Revenue, Major Customer [Line Items]    
Total revenues 18,230 25,830
Total revenues (7,600)  
Environmental attributes | Fuel Station Services    
Revenue, Major Customer [Line Items]    
Total revenues 11,498 17,252
Total revenues (5,754)  
Environmental attributes | Renewable Power    
Revenue, Major Customer [Line Items]    
Total revenues 713 821
Total revenues (108)  
Environmental attributes | Renewable Power | OCI Fuels B.V. ("OCI")    
Revenue, Major Customer [Line Items]    
Total revenues 0 3,617
Other | RNG fuel    
Revenue, Major Customer [Line Items]    
Total revenues 587 312
Total revenues 275  
Other | Renewable Power    
Revenue, Major Customer [Line Items]    
Total revenues 51 48
Total revenues 3  
OPAL owned stations | Fuel Station Services    
Revenue, Major Customer [Line Items]    
Total revenues 5,951 4,906
Total revenues 1,045  
RNG marketing | Fuel Station Services    
Revenue, Major Customer [Line Items]    
Total revenues 9,691 11,274
Total revenues (1,583)  
Third party station service and maintenance | Fuel Station Services    
Revenue, Major Customer [Line Items]    
Total revenues 6,800 7,070
Total revenues (270)  
Construction | Fuel Station Services    
Revenue, Major Customer [Line Items]    
Total revenues 4,899 7,991
Total revenues (3,092)  
Lease revenues | Fuel Station Services    
Revenue, Major Customer [Line Items]    
Total revenues 5,727 2,185
Total revenues 3,542  
Lease revenues | Fuel Station Services | OCI Fuels B.V. ("OCI")    
Revenue, Major Customer [Line Items]    
Total revenues 2,246 0
Lease revenues | Renewable Power    
Revenue, Major Customer [Line Items]    
Total revenues 232 256
Total revenues (24)  
Electricity sales | Renewable Power    
Revenue, Major Customer [Line Items]    
Total revenues 5,792 5,256
Total revenues 536  
Capacity | Renewable Power    
Revenue, Major Customer [Line Items]    
Total revenues 383 $ 749
Total revenues $ (366)  
[1] Includes revenues from related parties of $17,042 and $20,101 for the three months ended March 31, 2026 and 2025, respectively.
[2] Includes revenues from related parties of $13,107 and $16,603 for the three months ended March 31, 2026 and 2025, respectively
[3] Includes revenues from related parties of $872 and $1,166 for the three months ended March 31, 2026 and 2025, respectively.