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Note 12 - Leases (Details Textual)
 12 Months Ended
Feb. 29, 2016
USD ($)
a
Dec. 31, 2024
USD ($)
Feb. 01, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Operating Lease, Right-of-Use Asset   $ 3,746,000   $ 431,000 $ 431,000
Lessee, Operating Lease, Liability, to be Paid   7,547,000      
Lessee, Operating Lease, Liability, Undiscounted Excess Amount   $ 3,760,000      
Operating Lease, Weighted Average Discount Rate, Percent   11.00%      
Operating Lease, Weighted Average Remaining Lease Term (Year)   16 years      
Operating Lease, Cost   $ 401,000      
Operating Lease, Liability   $ 3,787,000      
Minimum [Member]          
Lessee, Operating Lease, Remaining Lease Term (Month)   22 months      
Maximum [Member]          
Lessee, Operating Lease, Remaining Lease Term (Month)   25 years      
Northern Pipeline Agreement [Member]          
Lessor, Operating Lease, Term of Contract (Year)     26 years    
Operating Lease, Right-of-Use Asset     $ 1,900,000    
Lessee, Operating Lease, Liability, to be Paid     4,800,000    
Lessee, Operating Lease, Liability, Undiscounted Excess Amount     $ 2,900,000    
Operating Lease, Weighted Average Discount Rate, Percent     10.00%    
Operating Lease, Annual Rent Payments     $ 185,000    
Corporate Office Lease Agreement [Member]          
Operating Lease, Right-of-Use Asset   $ 1,600,000      
Lessee, Operating Lease, Liability, to be Paid   2,600,000      
Lessee, Operating Lease, Liability, Undiscounted Excess Amount   $ 1,000,000      
Operating Lease, Weighted Average Discount Rate, Percent   12.00%      
Operating Lease, Weighted Average Remaining Lease Term (Year)   10 years      
Operating Lease, Liability   $ 1,600,000      
Fenner Valley Farms LLC Lease Agreement [Member]          
Lessor, Operating Lease, Term of Contract (Year) 99 years        
Area of Real Estate Property (Acre) | a 2,100        
Long-term Debt, Total $ 12,000,000        
Lessor, Operating Lease, Payment to be Received, Year One   420,000      
Lessor, Operating Lease, Payment to be Received, Year Two   420,000      
Lessor, Operating Lease, Payment to be Received, Year Three   420,000      
Lessor, Operating Lease, Payment to be Received, Year Four   420,000      
Lessor, Operating Lease, Payment to be Received, Year Five   $ 420,000