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Long-Term Debt (Details)
12 Months Ended
Jul. 20, 2013
USD ($)
Dec. 31, 2016
USD ($)
borrowing_base
Dec. 31, 2015
USD ($)
Feb. 14, 2012
USD ($)
Sep. 19, 2011
hp
Long-term debt [Abstract]          
Long-term debt   $ 97,402,000 $ 140,732,000    
Less current maturities   (786,000) (2,330,000)    
Long-term debt – less current maturities   96,616,000 138,402,000    
Maturities of long-term debt [Abstract]          
2015   786,000      
2016   93,261,000      
2017   273,000      
2018   285,000      
2019   297,000      
Thereafter   2,500,000      
Credit Facility [Abstract]          
Maximum borrowing capacity   300,000,000      
Current borrowing base   $ 115,000,000      
Number of reserve reports prepared by independent petroleum engineers | borrowing_base   1      
Number of reserve report prepared internally | borrowing_base   1      
Number of borrowing base redetermination | borrowing_base   1      
Term of borrowing base redetermination   6 months      
Description of variable rate basis   LIBOR      
Financial covenants, minimum current ratio   1.00      
Financial covenants, interest coverage ratio   2.50      
Financial covenants, total debt To EBITDAX ratio   4.00      
Interest coverage ratio   10.49      
Total debt to EBITDAX ratio   2.32      
Current ratio   1.64      
Senior Secured Credit Facility [Member]          
Long-term debt [Abstract]          
Long-term debt   $ 93,000,000 134,000,000    
Maturities of long-term debt [Abstract]          
Maturity date of debt instrument   Jun. 30, 2018      
Percentage added to reference rate (in hundredths)   0.50%      
Credit Facility [Abstract]          
Market value of property (in hundredths)   5.00%      
Reduced collateral value (in hundredths)   5.00%      
Interest rate on credit facility (in hundredths)   3.27%      
Senior Secured Credit Facility [Member] | Minimum [Member]          
Maturities of long-term debt [Abstract]          
Percentage added to reference rate (in hundredths)   0.75%      
Credit Facility [Abstract]          
Percentage added to variable rate of interest (in hundredths)   1.75%      
Senior Secured Credit Facility [Member] | Maximum [Member]          
Maturities of long-term debt [Abstract]          
Percentage added to reference rate (in hundredths)   1.75%      
Credit Facility [Abstract]          
Percentage added to variable rate of interest (in hundredths)   2.75%      
Rig Loan Agreement [Member]          
Long-term debt [Abstract]          
Long-term debt   $ 535,000 2,620,000    
Rig Loan Agreement [Abstract]          
Power of diesel electric drilling rig (in horsepower) | hp         2,000
Amount that can be borrowed under rig loan agreement       $ 7,000,000  
Interest rate on debt (in hundredths)       4.26%  
Real Estate Lien Note [Abstract]          
Monthly installments of principal and interest   179,695      
Real Estate Lien Note [Member]          
Long-term debt [Abstract]          
Long-term debt   $ 3,867,000 $ 4,112,000    
Real Estate Lien Note [Abstract]          
Fixed interest rate on note (in hundredths) 4.25%        
Monthly installments of principal and interest $ 34,354        
Debt Instrument, Basis Spread on Variable Rate, Expected Rate     1.00%    
Debt Instrument, Interest Rate, Effective Percentage Rate Range, Maximum Expected Rate   7.25%