INCOME TAXES - Net Operating Loss Carryforwards (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 39,497	$ 42,818
United States
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	22,505	17,752
Canada
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	6,117	5,408
Malaysia
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	5,726	5,726
Brazil
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	5,149	6,894
Others
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 0	$ 7,038