STOCKHOLDERS' EQUITY (Details) - USD ($)	1 Months Ended	12 Months Ended
	Nov. 30, 2013	Jan. 03, 2016	Dec. 28, 2014	Dec. 29, 2013	Jul. 31, 2013
Equity [Abstract]
Shares of common stock authorized to issue		100,000,000	100,000,000
Shares of authorized but unissued undesignated preferred stock		10,000,000	10,000,000
Dollar amount of offerings (up to)					$ 40,000,000
Aggregate amount of shares of common stock issued	8,740,000
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001	$ 0.001
Underwritten public offering price (in dollars per share)	$ 2.90	$ 1.13
Net proceeds from offering	$ 23,100,000
Underwriter's commission and other offering expenses	$ 2,200,000		$ (40,000)	$ 2,219,000
Class of Warrant or Right [Line Items]
Warrants outstanding (in warrants)		2,300,000
November 2009 Financing
Class of Warrant or Right [Line Items]
Warrants outstanding (in warrants)		1,900,000
Strike price (in dollars per share)		$ 2.15
June 2012 Financing
Class of Warrant or Right [Line Items]
Warrants outstanding (in warrants)		2,300,000
Strike price (in dollars per share)		$ 2.98