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Description Of Business And Significant Accounting Policies (Narrative) (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Mar. 27, 2020
Description Of Business And Significant Accounting Policies [Line Items]        
Unevaluated properties $ 0      
Impairment 0 $ 0    
Accounts receivable - current 372,000   $ 557,000  
Allowance for doubtful accounts 0   0  
Revenue 963,000 $ 1,171,000    
Tax [Member]        
Description Of Business And Significant Accounting Policies [Line Items]        
Accounts receivable - current 130,000   65,000 $ 65,000
Accounts receivable - noncurrent 0   65,000  
Natural Gas Imbalances [Member]        
Description Of Business And Significant Accounting Policies [Line Items]        
Revenue $ 0   $ 0