Annual report pursuant to Section 13 and 15(d)

ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)

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ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)
12 Months Ended
Dec. 31, 2017
USD ($)
$ / BarrelofOilEquivalent-Boe
Dec. 31, 2016
USD ($)
$ / BarrelofOilEquivalent-Boe
Dec. 31, 2015
USD ($)
$ / BarrelofOilEquivalent-Boe
Organization And Summary Of Significant Accounting Policies [Line Items]      
Depletion | $ $ 20,197,690 $ 11,179,858 $ 14,889,487
Depletion rate, per barrel-of-oil-equivalent (BOE) | $ / BarrelofOilEquivalent-Boe 13.92 12.73 20.03