Annual report pursuant to Section 13 and 15(d)

ASSET RETIREMENT OBLIGATIONS (Details)

v3.8.0.1
ASSET RETIREMENT OBLIGATIONS (Details)
6 Months Ended 12 Months Ended
Apr. 18, 2016
Sep. 30, 2016
Dec. 31, 2017
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]      
Estimated asset life 3 years 3 years  
Asset Retirement Obligation Costs [Member]      
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]      
Inflation rate (avg.)     2.10%
Estimated asset life     21 years