Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVE INSTRUMENTS AND PRICE RISK MANAGEMENT - Reconciliation between the gross assets and liabilities and the amounts reflected on the balance sheet (Details)

v3.8.0.1
DERIVATIVE INSTRUMENTS AND PRICE RISK MANAGEMENT - Reconciliation between the gross assets and liabilities and the amounts reflected on the balance sheet (Details) - USD ($)
Sep. 30, 2017
Dec. 31, 2016
Offsetting Assets [Line Items]    
Current assets $ 2,622,120 $ 4,517
Noncurrent assets 817,418 0
Total derivative assets 4,697,799 20,962
Current liabilities (4,741) (10,001,564)
Noncurrent liabilities 0 (1,738,329)
Total derivative liabilities (1,263,002) (11,756,338)
Gross Amounts of Recognized Assets, Offsetting of Derivative Assets 4,697,799 20,962
Gross Amounts Offset in the Balance Sheet, Offsetting of Derivative Assets (1,258,261) (16,445)
Net Amounts of Assets Presented in the Balance Sheet, Offsetting of Derivative Assets 3,439,538 4,517
Gross Amounts of Recognized Assets, Offsetting of Derivative Liabilities (1,263,002) (11,756,338)
Gross Amounts Offset in the Balance Sheet, Offsetting of Derivative Liabilities 1,258,261 16,445
Net Amounts of Assets Presented in the Balance Sheet, Offsetting of Derivative Liabilities (4,741) (11,739,893)
Current Assets [Member]    
Offsetting Assets [Line Items]    
Gross Amounts of Recognized Assets, Offsetting of Derivative Assets 3,880,381 20,962
Gross Amounts Offset in the Balance Sheet, Offsetting of Derivative Assets (1,258,261) (16,445)
Net Amounts of Assets Presented in the Balance Sheet, Offsetting of Derivative Assets 2,622,120 4,517
Noncurrent Assets [Member]    
Offsetting Assets [Line Items]    
Gross Amounts of Recognized Assets, Offsetting of Derivative Assets 817,418 0
Gross Amounts Offset in the Balance Sheet, Offsetting of Derivative Assets 0 0
Net Amounts of Assets Presented in the Balance Sheet, Offsetting of Derivative Assets 817,418 0
Current Liabilities [Member]    
Offsetting Assets [Line Items]    
Gross Amounts of Recognized Assets, Offsetting of Derivative Liabilities (1,263,002) (10,018,009)
Gross Amounts Offset in the Balance Sheet, Offsetting of Derivative Liabilities 1,258,261 16,445
Net Amounts of Assets Presented in the Balance Sheet, Offsetting of Derivative Liabilities (4,741) (10,001,564)
Noncurrent Liabilities [Member]    
Offsetting Assets [Line Items]    
Gross Amounts of Recognized Assets, Offsetting of Derivative Liabilities 0 (1,738,329)
Gross Amounts Offset in the Balance Sheet, Offsetting of Derivative Liabilities 0 0
Net Amounts of Assets Presented in the Balance Sheet, Offsetting of Derivative Liabilities 0 (1,738,329)
Swap Contracts [Member] | Current Assets [Member]    
Offsetting Assets [Line Items]    
Current assets 3,201,639 20,962
Swap Contracts [Member] | Noncurrent Assets [Member]    
Offsetting Assets [Line Items]    
Noncurrent assets 550,795 0
Swap Contracts [Member] | Current Liabilities [Member]    
Offsetting Assets [Line Items]    
Current liabilities (1,263,002) (9,862,215)
Swap Contracts [Member] | Noncurrent Liabilities [Member]    
Offsetting Assets [Line Items]    
Noncurrent liabilities 0 (1,738,329)
Costless Collars [Member] | Current Assets [Member]    
Offsetting Assets [Line Items]    
Current assets 678,742 0
Costless Collars [Member] | Noncurrent Assets [Member]    
Offsetting Assets [Line Items]    
Noncurrent assets 266,623 0
Costless Collars [Member] | Current Liabilities [Member]    
Offsetting Assets [Line Items]    
Current liabilities $ 0 $ (155,794)