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SEGMENT INFORMATION - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Dec. 31, 2016
Segment Reporting Information [Line Items] |  |  |
Revenue | $ 3,756 | $ 17,996 |
Costs and expenses applicable to revenue | 2,071 | 12,143 |
Impairment of inventories | 0 |  |
Development, permitting and land holding | 3,323 | 7,442 |
Standby costs | 1,206 | 2,166 |
Abandonment of mineral properties | 245 | 0 |
Accretion of asset retirement obligation | 345 | 175 | $ 906
Selling costs | 70 | 74 |
Intangible asset amortization | 205 | 219 |
General and administration | 4,428 | 3,828 |
Total operating loss | (8,137) | (8,377) |
Interest expense | (542) | (576) |
Other expense | (1,917) | 88 |
Net loss | (10,596) | (8,865) |
Owners of the Company | (10,508) | (8,808) |
Non-controlling interests | (88) | $ (57) |
Operating Segments | Conventional |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue | 3,756 |  |
Costs and expenses applicable to revenue | 2,071 |  |
Impairment of inventories | 0 |  |
Development, permitting and land holding | 2,912 |  |
Standby costs | 429 |  |
Abandonment of mineral properties | 0 |  |
Accretion of asset retirement obligation | 170 |  |
Selling costs | 70 |  |
Intangible asset amortization | 205 |  |
General and administration | 775 |  |
Total operating loss | (2,876) |  |
Interest expense | 0 |  |
Other expense | 0 |  |
Net loss | (2,876) |  |
Owners of the Company | (2,876) |  |
Non-controlling interests | 0 |  |
Operating Segments | ISR |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue | 0 |  |
Costs and expenses applicable to revenue | 0 |  |
Impairment of inventories | 0 |  |
Development, permitting and land holding | 411 |  |
Standby costs | 777 |  |
Abandonment of mineral properties | 245 |  |
Accretion of asset retirement obligation | 175 |  |
Selling costs | 0 |  |
Intangible asset amortization | 0 |  |
General and administration | 228 |  |
Total operating loss | (1,836) |  |
Interest expense | 0 |  |
Other expense | 0 |  |
Net loss | (1,836) |  |
Owners of the Company | (1,748) |  |
Non-controlling interests | (88) |  |
Corporate & Other |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue | 0 |  |
Costs and expenses applicable to revenue | 0 |  |
Impairment of inventories | 0 |  |
Development, permitting and land holding | 0 |  |
Standby costs | 0 |  |
Abandonment of mineral properties | 0 |  |
Accretion of asset retirement obligation | 0 |  |
Selling costs | 0 |  |
Intangible asset amortization | 0 |  |
General and administration | 3,425 |  |
Total operating loss | (3,425) |  |
Interest expense | (542) |  |
Other expense | (1,917) |  |
Net loss | (5,884) |  |
Owners of the Company | (5,884) |  |
Non-controlling interests | $ 0 |  |

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