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F. FIXED ASSETS (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Abstract]    
Land and improvements $ 432 $ 432
Buildings and improvements 341 341
Total fixed assets 773 773
Less: Accumulated depletion (117) (105)
Net Fixed Assets $ 656 $ 668