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LOANS AND BORROWINGS - Schedule of Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current portion of loans and borrowings:
Wyoming Industrial Development Revenue Bond loan	$ 3,512	$ 3,414
Total current loans and borrowings	3,512	3,414
Long-term loans and borrowings:
Convertible debentures	15,538	16,636
Wyoming Industrial Development Revenue Bond loan	5,660	7,441
Total long-term loans and borrowings	$ 21,198	$ 24,077

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Carrying value as of the balance sheet date of long-term debt (with maturities initially due after one year or beyond the operating cycle if longer) identified as Convertible Notes Payable, excluding current portion. Convertible Notes Payable is a written promise to pay a note which can be exchanged for a specified amount of another, related security, at the option of the issuer and the holder.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
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Carrying value as of the balance sheet date of portion of long-term loans payable due within one year or the operating cycle if longer.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
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-Name Accounting Standards Codification
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