Quarterly report pursuant to Section 13 or 15(d)

Note 6 - Derivative Financial Instruments - Summary of Open Commodity Derivative Contracts (Details)

v3.20.2
Note 6 - Derivative Financial Instruments - Summary of Open Commodity Derivative Contracts (Details)
 6 Months Ended
Jun. 30, 2020
$ / shares
bbl
NYMEX Crude Oil Swap [Member] | Open Crude Oil Derivative Contracts 1 [Member]  
Period Jan 2021 - Dec 2021
Notional Quantity (Barrel of Oil) | bbl 1,000 [1]
Notional Quantity 365,000 [1]
Strike (in dollars per share) $ 41.00
NYMEX Crude Oil Calls [Member] | Open Crude Oil Derivative Contracts 2 [Member]  
Period July 2020 - Dec. 2020
Notional Quantity (Barrel of Oil) | bbl 10,000 [1]
Notional Quantity 1,840,000 [1]
Strike (in dollars per share) $ 67.50
NYMEX Crude Oil Collar [Member] | Crude Oil, Open Collar Contracts [Member]  
Period July 2020 - Dec. 2020
Notional Quantity (Barrel of Oil) | bbl 10,000 [1]
Notional Quantity 1,840,000 [1]
NYMEX Crude Oil Collar [Member] | Crude Oil, Open Collar Contracts [Member] | Put Option [Member]  
Strike (in dollars per share) $ 45.00
NYMEX Crude Oil Collar [Member] | Crude Oil, Open Collar Contracts [Member] | Call Option [Member]  
Strike (in dollars per share) $ 63.51
NYMEX Natural Gas Open Swap Contracts [Member] | Natural Gas, Open Swap Contracts, One [Member]  
Period Sept 2020 - Dec 2020
Notional Quantity (Barrel of Oil) | bbl 10,000
Notional Quantity 1,220,000
Strike (in dollars per share) $ 2.03
NYMEX Natural Gas, Open Call Contracts [Member] | Natural Gas, Open Call Contracts, One [Member]  
Period August 2020 - Dec. 2022
Notional Quantity (Barrel of Oil) | bbl 40,000
Notional Quantity 35,320,000
Strike (in dollars per share) $ 3.00
NYMEX Natural Gas Two Way Collars [Member] | Natural Gas, Open Collar Contracts, One [Member]  
Period August 2020 - Dec. 2022
Notional Quantity (Barrel of Oil) | bbl 40,000 [2]
Notional Quantity 35,320,000 [2]
NYMEX Natural Gas Two Way Collars [Member] | Natural Gas, Open Collar Contracts, One [Member] | Put Option [Member]  
Strike (in dollars per share) $ 1.83
NYMEX Natural Gas Two Way Collars [Member] | Natural Gas, Open Collar Contracts, One [Member] | Call Option [Member]  
Strike (in dollars per share) $ 3.00
NYMEX Natural Gas Two Way Collars [Member] | Natural Gas, Open Collar Contracts, Two [Member]  
Period August 2020 - Dec. 2020
Notional Quantity (Barrel of Oil) | bbl 10,000 [2]
Notional Quantity 1,530,000 [2]
NYMEX Natural Gas Two Way Collars [Member] | Natural Gas, Open Collar Contracts, Two [Member] | Put Option [Member]  
Strike (in dollars per share) $ 1.75
NYMEX Natural Gas Two Way Collars [Member] | Natural Gas, Open Collar Contracts, Two [Member] | Call Option [Member]  
Strike (in dollars per share) $ 2.58
NYMEX Natural Gas Two Way Collars [Member] | Natural Gas, Open Collar Contracts, Three [Member]  
Period Jan 2021 - Dec 2021
Notional Quantity (Barrel of Oil) | bbl 30,000 [2]
Notional Quantity 10,950,000 [2]
NYMEX Natural Gas Two Way Collars [Member] | Natural Gas, Open Collar Contracts, Three [Member] | Put Option [Member]  
Strike (in dollars per share) $ 2.18
NYMEX Natural Gas Two Way Collars [Member] | Natural Gas, Open Collar Contracts, Three [Member] | Call Option [Member]  
Strike (in dollars per share) $ 3.00
NYMEX Natural Gas Two Way Collars [Member] | Natural Gas, Open Collar Contracts, Four [Member]  
Period Jan 2022 - Feb 2022
Notional Quantity (Barrel of Oil) | bbl 30,000 [2]
Notional Quantity 1,770,000 [2]
NYMEX Natural Gas Two Way Collars [Member] | Natural Gas, Open Collar Contracts, Four [Member] | Put Option [Member]  
Strike (in dollars per share) $ 2.20
NYMEX Natural Gas Two Way Collars [Member] | Natural Gas, Open Collar Contracts, Four [Member] | Call Option [Member]  
Strike (in dollars per share) $ 4.50
[1] Bbls = Barrels
[2] MMBtu = Million British Thermal Units