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Note 2 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Total revenues $ 17,627 $ 15,316 $ 55,995 $ 55,065
UNITED STATES        
Total revenues 16,602 13,758 52,482 48,943
MEXICO        
Total revenues 1,025 1,558 3,513 6,122
Natural Gas, Gathering, Transportation, Marketing and Processing [Member]        
Total revenues 14,256 12,122 44,295 44,595
Rental [Member]        
Total revenues 1,614 1,330 5,469 4,640
Service [Member]        
Total revenues 1,681 1,579 5,298 4,745
Product and Service, Other [Member]        
Total revenues $ 76 $ 285 $ 933 $ 1,085