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Note 2 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Total revenues $ 17,309 $ 18,598 $ 34,647 $ 38,368
UNITED STATES        
Total revenues 16,435 17,373 32,958 35,880
MEXICO        
Total revenues 874 1,225 1,689 2,488
Natural Gas, Gathering, Transportation, Marketing and Processing [Member]        
Total revenues 14,628 14,626 28,574 30,039
Rental [Member]        
Total revenues 1,296 1,682 2,846 3,855
Service [Member]        
Total revenues 1,169 1,693 2,874 3,617
Product and Service, Other [Member]        
Total revenues $ 216 $ 597 $ 353 $ 857