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INCOME TAXES (Details 2) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Reconciliation of income taxes calculated at the statutory rate to the actual income tax provision      
Income tax expense (recovery) at Canadian statutory income tax rates $ 3,499 $ (8,023) $ (6,288)
Increase (decrease) in income taxes for:      
Permanent and other differences (5,279) 6,335 3,178
Change in statutory/foreign tax rates (2,762) (1,973) (1,470)
Change in valuation allowance (10,358) 1,805 (9,223)
Stock-based compensation expense 1,603 891 1,125
Adjustment to prior years 67   6,347
Foreign exchange gain adjustment     3,523
Income tax expense (recovery) $ (13,230) $ (965) $ (2,808)