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LOANS AND BORROWINGS - (Outstanding Loans) (Details) CAD in Thousands, $ in Thousands | Dec. 31, 2016 USD ($) | Dec. 31, 2016 CAD | Dec. 31, 2015 USD ($) | Dec. 31, 2015 CAD | Dec. 03, 2013
--- | --- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |  |
Nominal interest rate |  |  |  |  | 5.75%
Face value | $ 30,463 |  | $ 33,915 |  |
Carrying amount | $ 29,554 |  | 32,519 |  |
Convertible Debt | Convertible Debentures |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Nominal interest rate | 8.50% | 8.50% |  |  |
Face value | CAD |  | CAD 16,385 |  | CAD 15,896 |
Carrying amount | CAD |  | CAD 15,476 |  | CAD 14,624 |
Secured Debt | Secured note |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Nominal interest rate | 7.00% | 7.00% |  |  |
Face value | $ 0 |  | 500 |  |
Carrying amount | $ 0 |  | 474 |  |
Secured Debt | Wyoming Industrial Development Revenue Bond Program Loan |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Nominal interest rate | 5.75% | 5.75% |  |  |
Face value | $ 14,078 |  | 17,369 |  |
Carrying amount | $ 14,078 |  | 17,369 |  |
Capital Lease Obligations | Finance leases and other |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Nominal interest rate | 7.00% | 7.00% |  |  |
Face value | $ 0 |  | 150 |  |
Carrying amount | $ 0 |  | $ 52 |  |

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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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