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INCOME TAXES - Schedule of Rate Reconciliation Between Income Tax Provisions and Effective Rate (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Jan. 01, 2017
Jan. 03, 2016
Income Tax Disclosure [Abstract]      
Income tax (benefit) at statutory rate $ (4,775) $ (6,489) $ (5,962)
State taxes 2 (3) 2
Stock compensation and other permanent differences 75 211 286
Foreign taxes (30) (19) 41
Benefit allocated from other comprehensive income (loss) 0 0 0
Future benefit of deferred tax assets not recognized 4,815 6,365 5,779
Provision for income taxes $ 87 $ 65 $ 146