Quarterly report pursuant to Section 13 or 15(d)

Note 12 - Subsequent Events (Details Textual)

v3.20.1
Note 12 - Subsequent Events (Details Textual) - USD ($)
$ in Millions
 3 Months Ended
Jun. 17, 2020
Apr. 15, 2020
Oct. 18, 2018
Jun. 30, 2020
Mar. 31, 2020
Subsequent Event [Member]          
Proceeds from Paycheck Protection Program Under CARES Act   $ 8.4      
Senior Second Lien Notes Due November 2023 [Member]          
Extinguishment of Debt, Amount         $ 27.5
Repayments of Long-term Debt, Total         $ 8.5
Senior Second Lien Notes Due November 2023 [Member] | Forecast [Member]          
Extinguishment of Debt, Amount       $ 45.1  
Repayments of Long-term Debt, Total       $ 15.4  
Credit Agreement [Member]          
Line of Credit Facility, Maximum Borrowing Capacity     $ 250.0    
Credit Agreement, Minimum Percentage of Total Proved Reserves     85.00%    
Credit Agreement [Member] | Subsequent Event [Member]          
Line of Credit Facility, Maximum Borrowing Capacity $ 215.0        
Debt Instrument, Interest Rate, Increase (Decrease) 0.25%        
Credit Agreement, Leverage Ratio 2        
Credit Agreement, Minimum Percentage of Total Proved Reserves 90.00%