Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Jul. 04, 2015	Jan. 03, 2015	Jun. 28, 2014
Statement of Financial Position [Abstract]
Preferred stock, par value	$ 0.001	$ 0.001	$ 0.001
Preferred stock, shares authorized	1,000,000	1,000,000	1,000,000
Preferred stock, shares outstanding	0	0	0
Common stock, par value	$ 0.001	$ 0.001	$ 0.001
Common stock, shares authorized	50,000,000	50,000,000	50,000,000
Common stock, shares issued	25,375,312	25,092,550	25,004,808
Common stock, shares outstanding	24,686,423	24,403,661	24,315,919