Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Joint Venture Drilling Program (Details Textual)

v3.19.3
Note 4 - Joint Venture Drilling Program (Details Textual) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Mar. 12, 2018
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Property, Plant and Equipment, Net, Ending Balance   $ 720,951   $ 720,951   $ 515,421
Other Assets, Noncurrent, Total   32,864   32,864   91,547
Revenue from Contract with Customer, Excluding Assessed Tax, Total   132,221 $ 153,459 383,002 $ 437,284  
Other Nonoperating Income (Expense), Total   $ (555) $ (18) $ (1,364) (532)  
JV Drilling Program [Member] | Mr. Tracy W. Krohn [Member]            
Minority Interest Ownership Percentage By Joint Venture   4.50%   4.50%    
Monza Energy, LLC [Member]            
Property, Plant and Equipment, Net, Ending Balance   $ 16,800   $ 16,800   8,800
Other Assets, Noncurrent, Total   3,700   3,700   3,300
Increase (Decrease) in Working Capital       3,600   $ 700
Revenue from Contract with Customer, Excluding Assessed Tax, Total       7,400 2,200  
Operating Costs and Expenses, Total       4,600 1,100  
Other Nonoperating Income (Expense), Total         $ 300  
Cash Calls Received from Joint Venture   123,500   123,500    
Monza Energy, LLC [Member] | Advances from Joint Interest Partners [Member]            
Cash Calls Received from Joint Venture   36,500   36,500    
Monza Energy, LLC [Member] | JV Drilling Program [Member]            
Joint Venture Working Interest Percentage Contributed to Related Party 88.94%          
Joint Venture Working Interest Percent 11.06%          
Amount Committed by Investors $ 361,400          
Oil and Gas Revenue, Percent 30.00%          
Well Cost, Percent 20.00%          
Capital Contribution Payments from Related Party   282,200   282,200    
Capital Contributions from Related Party During Period       125,500    
Capital Contribution Payments to Related Party, Net   61,400   61,400    
Monza Energy, LLC [Member] | JV Drilling Program [Member] | Mr. Tracy W. Krohn [Member]            
Capital Commitment to Joint Venture   $ 14,500   $ 14,500