CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Aug. 02, 2015	Aug. 03, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 4,701	$ 3,344
Other comprehensive loss
Unrealized loss on investments	(89)	(10)
Total other comprehensive loss	(89)	(10)
Comprehensive income	$ 4,612	$ 3,334