Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Aug. 01, 2015	Jan. 31, 2015
Statement of Financial Position [Abstract]
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	180,000,000	180,000,000
Common stock, shares issued	40,485,727	40,184,803
Common stock, shares outstanding	40,190,839	39,892,540
Treasury stock, shares	294,888	292,263