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Note 5 - Other Long-Term Obligations and Commitments (Details Textual) - USD ($)
12 Months Ended
Dec. 31, 2028
Dec. 31, 2027
Dec. 31, 2026
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Apr. 01, 2025
Feb. 16, 2025
Operating Lease, Cost         $ 739,000 $ 700,000    
Operating Lease, Payments         $ 792,000 $ 739,000    
Operating Lease, Weighted Average Remaining Lease Term         3 months 11 months    
Certain Leases for Office Space in Texas [Member]                
Lessee, Operating Lease, Liability Extra Payment, Year Three         $ 149,000      
Operating Lease, Expense         $ 893,000 $ 767,000    
Houston Office [Member] | Subsequent Event [Member]                
Lessee, Operating Lease, Term of Contract               12 months
Prime Operating's Midland [Member] | Forecast [Member]                
Lessee, Operating Lease, Term of Contract             2 years  
EOWS Midland Company [Member] | Forecast [Member]                
Lessee, Operating Lease, Term of Contract             3 years  
Houston and Midlands Offices [Member] | Forecast [Member]                
Operating Lease, Expense $ 27,000 $ 127,000 $ 290,000 $ 671,000