INCOME TAXES - Schedule of U.S. and Foreign Components of Consolidated Income (Loss) before Income Taxes and Provision for (Benefit from) Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 01, 2017	Jan. 03, 2016	Dec. 28, 2014
Income (loss) before income taxes:
U.S.	$ (19,340)	$ (17,897)	$ (13,172)
Foreign	257	195	161
Income (loss) before income taxes	(19,083)	(17,702)	(13,011)
Current:
Federal	0	37	0
State	(3)	2	0
Foreign	75	99	95
Subtotal	72	138	95
Deferred:
Federal	0	0	0
State	0	0	0
Foreign	(7)	8	(27)
Subtotal	(7)	8	(27)
Provision for income taxes	$ 65	$ 146	$ 68