LIQUIDITY AND GOING CONCERN (Details Narrative) $ in Thousands		1 Months Ended		3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 14, 2016 USD ($)	Feb. 29, 2016 USD ($)	Jan. 31, 2016 Number	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2015 USD ($)
Working capital						$ 9,091
Accumulated deficit				$ (124,788)		(124,788)				$ (109,705)
Net loss				(265)	$ (23,651)	(15,083)	$ (53,634)
Current portion of long-term debt				$ 6,000		6,000				$ 6,000
Amount of reduction in overhead						4,000
General and administrative expenses						$ 2,360
Percentage of production barrel oil				53.00%		53.00%
Reduction in mining expense						$ 373	$ 2,385
Cash and equivalents				$ 1,204		1,204
Mining expense						7,000
Mining Segment [Member]
Reduction in mining expense						$ 2,012
Credit Agreement [Member] | Wells Fargo Bank, National Association [Member]
Maturity date						Jul. 30, 2017
Earnings And Participation Agreement (the "Agreement") [Member] | IronHorse Resources LLC ("IronHorse") [Member]
Drilling and completion costs	$ 9,600					$ 9,600
Subsequent Event [Member]
Funds requirement for proved undeveloped oil and gas properties								$ 3,800	$ 1,000
Minimum [Member]
Number of employees | Number			1
Maximum [Member]
Number of employees | Number			14
Series A Convertible Preferred Stock [Member]
Amount of reduction in overhead		$ 3,000