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Description Of Business And Significant Accounting Policies (Narrative) (Details)
 12 Months Ended
Mar. 21, 2016
Dec. 31, 2015
USD ($)
mi
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Mar. 01, 2013
USD ($)
Dec. 31, 2012
USD ($)
Description Of Business And Significant Accounting Policies [Line Items]            
Length of pipeline, miles | mi   65        
Certificate of Deposit to cover future asset retirement obligations           $ 386,000
Unevaluated properties   $ 552,000 $ 462,000      
Current cost discount   10.00%        
Allowance for doubtful accounts   $ 14,000 14,000      
Compensation expense   12,000 32,000 $ 50,000    
Reversal of compensation expense   59,500        
Federal net operating loss carryforwards   $ 22,900,000        
Deferred tax asset     7,351,000      
Deferred tax asset allowance recorded     $ 7,350,000      
Sale price of Swan Creek and Pipeline assets         $ 1,500,000  
Customer A [Member] | Revenue [Member]            
Description Of Business And Significant Accounting Policies [Line Items]            
Customer's percentage of revenue   74.50% 79.30% 79.80%    
Customer B [Member] | Revenue [Member]            
Description Of Business And Significant Accounting Policies [Line Items]            
Customer's percentage of revenue   16.10% 16.50% 14.90%    
Customer C [Member] | Revenue [Member]            
Description Of Business And Significant Accounting Policies [Line Items]            
Customer's percentage of revenue   8.60% 3.80% 1.70%    
Two Customers [Member] | Accounts Receivable [Member]            
Description Of Business And Significant Accounting Policies [Line Items]            
Customer's percentage of revenue   75.70% 84.50%      
Customer D [Member] | Accounts Receivable [Member]            
Description Of Business And Significant Accounting Policies [Line Items]            
Customer's percentage of revenue   66.50% 67.80%      
Minimum [Member]            
Description Of Business And Significant Accounting Policies [Line Items]            
Federal net operating loss carryforwards expiration between, years   Dec. 31, 2019        
Maximum [Member]            
Description Of Business And Significant Accounting Policies [Line Items]            
Federal net operating loss carryforwards expiration between, years   Dec. 31, 2032        
Subsequent Event [Member]            
Description Of Business And Significant Accounting Policies [Line Items]            
Reverse stock split 0.1          
Stock Options [Member]            
Description Of Business And Significant Accounting Policies [Line Items]            
Compensation expense   $ 12,000 $ 32,000 $ (28,000)