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INCOME TAXES - Schedule of Capital Losses and Net Operating Losses (Details) $ in Thousands | Dec. 31, 2018 USD ($)
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Operating Loss Carryforwards [Line Items] |
Net operating losses expected to expire | $ 75,000
Capital losses | United States |
Operating Loss Carryforwards [Line Items] |
Amount | 52,591
Disallowed Interest |
Operating Loss Carryforwards [Line Items] |
Amount | 353
CANADA | Non-capital losses | Canada |
Operating Loss Carryforwards [Line Items] |
Amount | 37,018
CANADA | Capital losses | Canada |
Operating Loss Carryforwards [Line Items] |
Amount | 3,293
CANADA | Investment Tax Credits | Canada |
Operating Loss Carryforwards [Line Items] |
Amount | 1,213
Pre-2018 Net operating losses | UNITED STATES | United States |
Operating Loss Carryforwards [Line Items] |
Amount | 250,370
Post-2017 Net Operating losses | UNITED STATES | United States |
Operating Loss Carryforwards [Line Items] |
Amount | $ 15,949

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