LIQUIDITY - Restructuring Costs and Reserves (Details) - USD ($) $ in Thousands			12 Months Ended
	Oct. 16, 2017	Nov. 02, 2015	Dec. 31, 2017	Dec. 31, 2015	Apr. 17, 2015	Dec. 31, 2014
Cost reduction and personnel retention program
Face amount						$ 8,500
Private Placement			$ 6,000	$ 4,000
First Tranche | AMER International Group
Cost reduction and personnel retention program
Private Placement		$ 4,000
Second Tranche | AMER International Group
Cost reduction and personnel retention program
Private Placement	$ 6,000
Funds allocated from private placement of shares for general corporate purposes	5,500
Funds allocated from Private Placement for expense reimbursement	500
Mt. Hope Project | AMER International Group | Senior secured term loan
Cost reduction and personnel retention program
Face amount	$ 700,000				$ 700,000