Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended
	Jul. 29, 2017	Jul. 30, 2016
Consolidated Statements of Comprehensive Loss
Net loss	$ (4,466)	$ (11,642)
Other comprehensive income:
Unrealized gain on investments, net of deferred tax expense of $2 and $12, respectively	2	18
Total comprehensive loss	(4,464)	(11,624)
Net loss attributable to noncontrolling interest	23
Total comprehensive loss	$ (4,441)	$ (11,624)