Quarterly report pursuant to Section 13 or 15(d)

Joint Venture Drilling Program (Details Textual)

v3.21.2
Joint Venture Drilling Program (Details Textual)
$ in Thousands
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended 43 Months Ended
Mar. 31, 2018
USD ($)
item
Sep. 30, 2021
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2021
USD ($)
item
Sep. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
Sep. 30, 2021
USD ($)
item
Mar. 12, 2018
USD ($)
Property, Plant and Equipment, Net, Ending Balance   $ 653,936   $ 653,936   $ 686,878 $ 653,936  
Other Assets, Noncurrent, Total   63,776   63,776   22,470 63,776  
Asset Retirement Obligation, Ending Balance   407,874   407,874   392,704 407,874  
Increase (Decrease) in Working Capital       3,200        
Revenue from Contract with Customer, Excluding Assessed Tax, Total   133,946 $ 72,517 392,421 $ 251,886      
Monza Energy, LLC [Member]                
Property, Plant and Equipment, Net, Ending Balance   5,100   5,100     5,100  
Other Assets, Noncurrent, Total   3,000   3,000     3,000  
Asset Retirement Obligation, Ending Balance   300   $ 300   200 $ 300  
Increase (Decrease) in Working Capital           1,300    
JV Drilling Program [Member]                
Number of wells completed | item       9     9  
Number of wells, drilling in progress | item       1        
Number of completed wells in operation | item       7        
JV Drilling Program [Member] | Monza Energy, LLC [Member]                
Capital Contribution Payments from Related Party   302,400   $ 302,400     $ 302,400  
Capital Contributions from Related Party During Period       85,500        
Capital Contribution Payments to Related Party, Net   60,700   60,700     60,700  
Monza Energy, LLC [Member]                
Property, Plant and Equipment, Net, Ending Balance           9,900    
Other Assets, Noncurrent, Total           1,800    
Cash Call Balance   $ 17,300   17,300   7,300 $ 17,300  
Revenue from Contract with Customer, Excluding Assessed Tax, Total       8,700   8,400    
Operating Costs and Expenses, Total       $ 9,500   $ 12,100    
Monza Energy, LLC [Member] | JV Drilling Program [Member]                
Number of initial members | item 2              
Amount Committed by Investors $ 361,400              
Joint Venture Working Interest Percentage Contributed to Related Party 88.94%              
Joint Venture Working Interest Percent 11.06%              
Oil and Gas Revenue, Percent 30.00%              
Well Cost, Percent 20.00%              
Monza Energy, LLC [Member] | JV Drilling Program [Member] | Mr. Tracy W. Krohn [Member]                
Minority Interest Ownership Percentage By Joint Venture 4.50%              
Capital Commitment to Joint Venture               $ 14,500