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Note 11 - Commitments and Contingencies (Details Textual) - USD ($)
Jan. 01, 2021
Dec. 14, 2020
Dec. 31, 2021
Dec. 31, 2020
US Bureau of Land Management (“BLM”) [Member]        
Right of Way Agreement, Period (Year) 29 years 30 years    
Right of Way Agreement, Annual Rent Expense $ 321,000 $ 321,000    
US Bureau of Land Management (“BLM”) [Member] | Other Noncurrent Assets [Member]        
Deposits Assets, Noncurrent   $ 420,000    
Water Project [Member]        
Deferred Revenue, Total     $ 750,000 $ 750,000