Quarterly report pursuant to Section 13 or 15(d)

CRUDE OIL AND NATURAL GAS PROPERTIES (Details)

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CRUDE OIL AND NATURAL GAS PROPERTIES (Details)
9 Months Ended 12 Months Ended
Sep. 30, 2017
USD ($)
a
$ / a
Sep. 30, 2016
USD ($)
a
$ / a
Dec. 31, 2016
USD ($)
a
Acquisitions [Abstract]      
Oil and Natural Gas Properties Included in Accounts Payable | $ $ 72,400,000 $ 42,834,450 $ 50,700,000
Mineral acres acquired, net (in acres) | a 1,693 1,645  
Average acquisition cost per net acre (in dollars per acre) | $ / a 2,396 2,965  
Unproved Properties [Abstract]      
Unproven leasehold interests (in acres) | a 16,941   26,432
Anticipated future period over which excluded costs will become subject to depletion 5 years    
Impairment costs related to expired leases subject to depletion | $ $ 100,000 $ 6,400,000