Quarterly report pursuant to Section 13 or 15(d)

Acquisitions and Divestitures (Details)

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Acquisitions and Divestitures (Details) - USD ($)
1 Months Ended 3 Months Ended
Jul. 31, 2018
Nov. 30, 2018
Jul. 31, 2018
Mar. 31, 2018
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Mar. 01, 2018
Sep. 29, 2017
Business Acquisition [Line Items]                  
Capitalized Costs, Proved Properties       $ 700,000 $ 1,000,000 $ 700,000      
Asset Retirement Obligation         4,400,000        
Business Acquisition, Transaction Costs         500,000        
Proceeds from sales of assets, net         1,600,000        
Business Acquisition, Pro Forma Revenue           82,456,000      
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations, Net of Tax           $ 12,407,000      
Business Acquisition, Pro Forma Earnings Per Share, Basic           $ 0.82      
Business Acquisition, Pro Forma Earnings Per Share, Diluted           $ 0.82      
Second Lien Facility         200,000,000   $ 200,000,000   $ 200,000,000
Hunt Acquisition [Member]                  
Business Acquisition [Line Items]                  
Working Capital Adjustments, Net $ 200,000   $ 200,000   245,000        
Capitalized Costs, Proved Properties               $ 82,443,000  
Asset Retirement Obligation               356,000  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net               96,978,000  
Net Cash Paid on Date of Acquisition               82,955,000  
Other Payments to Acquire Businesses         86,000,000        
Cash Paid on Date of Acquisition               84,400,000  
Accumulated Costs, net of suspended revenues, for wells in which Hunt elected not to participate               13,778,000  
Business Acquisition, Transaction Costs         400,000   $ 100,000 96,978,000  
Capitalized Costs, Unproved Properties               $ 16,339,000  
Cash Received for Suspended Revenues Attributable to Acquired Properties     1,448,000            
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual       400,000          
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual       $ 200,000          
Mid-Continent Divestiture [Member]                  
Business Acquisition [Line Items]                  
Working Capital Adjustments, Net (1,300,000)   $ (1,300,000)            
Asset Retirement Obligation         300,000        
Proceeds from sales of assets, net $ 6,200,000       $ 6,000,000        
Cash Paid to Buyer in Connection with Final Settlement   $ 500,000              
Cash Paid for Suspended Revenues in Connection with FInal Settlement   $ 200,000              
Pre-Tax Operating Income Attributable to Assets Sold           $ (800,000)