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LOANS AND BORROWINGS - Schedule of Debt (Details) - USD ($) $ in Thousands | Mar. 31, 2017 | Dec. 31, 2016
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Debt Disclosure [Abstract] |  |
Convertible debentures | $ 3,303 | $ 3,095
Wyoming Industrial Development Revenue Bond loan | 3,270 | 3,224
Total current loans and borrowings | 6,573 | 6,319
Convertible debentures | 13,211 | 12,381
Wyoming Industrial Development Revenue Bond loan | 10,019 | 10,854
Total long-term loans and borrowings | $ 23,230 | $ 23,235

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