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)
 9 Months Ended
Sep. 30, 2020
$ / shares
bbl
NYMEX Crude Oil Calls [Member] | Open Crude Oil Derivative Contracts 2 [Member]  
Period 10,000
Notional Quantity (Barrel of Oil) 920,000 [1]
Notional Quantity 67.50
NYMEX Crude Oil Collar [Member] | Open Crude Oil Derivative Contracts 2 [Member]  
Period 2,056
Notional Quantity (Barrel of Oil) 750,422 [1]
Notional Quantity 35.00
NYMEX Crude Oil Collar [Member] | Open Crude Oil Derivative Contracts 2 [Member] | Put Option [Member]  
Strike Price (in dollars per share) | $ / shares $ 50.00
NYMEX Crude Oil Collar [Member] | Open Crude Oil Derivative Contracts 1 [Member]  
Period 10,000
Notional Quantity (Barrel of Oil) 920,000 [1]
Notional Quantity 45.00
NYMEX Crude Oil Collar [Member] | Open Crude Oil Derivative Contracts 1 [Member] | Put Option [Member]  
Strike Price (in dollars per share) | $ / shares $ 63.51
NYMEX Natural Gas Two Way Collars [Member] | Natural Gas, Open Collar Contracts, One [Member]  
Period 10,000
Notional Quantity (Barrel of Oil) 610,000 [2]
Notional Quantity 1.75 [2]
NYMEX Natural Gas Two Way Collars [Member] | Natural Gas, Open Collar Contracts, One [Member] | Put Option [Member]  
Strike Price (in dollars per share) | $ / shares $ 2.58
NYMEX Natural Gas Two Way Collars [Member] | Natural Gas, Open Collar Contracts, Two [Member]  
Period 40,000
Notional Quantity (Barrel of Oil) 31,640,000 [2]
Notional Quantity 1.83 [2]
NYMEX Natural Gas Two Way Collars [Member] | Natural Gas, Open Collar Contracts, Two [Member] | Put Option [Member]  
Strike Price (in dollars per share) | $ / shares $ 3.00
NYMEX Natural Gas Two Way Collars [Member] | Natural Gas, Open Collar Contracts, Three [Member]  
Period 30,000
Notional Quantity (Barrel of Oil) 10,950,000 [2]
Notional Quantity 2.18 [2]
NYMEX Natural Gas Two Way Collars [Member] | Natural Gas, Open Collar Contracts, Three [Member] | Put Option [Member]  
Strike Price (in dollars per share) | $ / shares $ 3.00
NYMEX Natural Gas Two Way Collars [Member] | Natural Gas, Open Collar Contracts, Four [Member]  
Period 30,000
Notional Quantity (Barrel of Oil) 1,770,000 [2]
Notional Quantity 2.20 [2]
NYMEX Natural Gas Two Way Collars [Member] | Natural Gas, Open Collar Contracts, Four [Member] | Put Option [Member]  
Strike Price (in dollars per share) | $ / shares $ 4.50
NYMEX Crude Oil Swap [Member] | Open Crude Oil Derivative Contracts 2 [Member]  
Period 3,000
Notional Quantity (Barrel of Oil) 177,000
Notional Quantity 42.98
NYMEX Crude Oil Swap [Member] | Open Crude Oil Derivative Contracts 1 [Member]  
Period 4,000
Notional Quantity (Barrel of Oil) 1,460,000 [1]
Notional Quantity 42.06 [1]
NYMEX Natural Gas Open Swap Contracts [Member] | Natural Gas, Open Swap Contracts, One [Member]  
Period 10,000
Notional Quantity (Barrel of Oil) 610,000 [2]
Notional Quantity 2.03
NYMEX Natural Gas Open Swap Contracts [Member] | Natural Gas, Open Swap Contracts, Two [Member]  
Period 15,000
Notional Quantity (Barrel of Oil) 915,000 [2]
Notional Quantity 2.21
NYMEX Natural Gas Open Swap Contracts [Member] | Natural Gas, Open Swap Contracts, Three [Member]  
Period 10,000
Notional Quantity (Barrel of Oil) 3,650,000 [2]
Notional Quantity 2.62
NYMEX Natural Gas Open Swap Contracts [Member] | Natural Gas, Open Swap Contracts, Four [Member]  
Period 20,000
Notional Quantity (Barrel of Oil) 620,000 [2]
Notional Quantity 2.79
NYMEX Natural Gas Open Swap Contracts [Member] | Natural Gas, Open Swap Contracts, Five [Member]  
Period 30,000
Notional Quantity (Barrel of Oil) 840,000 [2]
Notional Quantity 2.79
NYMEX Natural Gas, Open Call Contracts [Member] | Natural Gas, Open Call Contracts, One [Member]  
Period 40,000
Notional Quantity (Barrel of Oil) 31,640,000 [2]
Notional Quantity 3.00
[1] Bbls = Barrels
[2] MMBtu = Million British Thermal Units