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CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 28, 2018	Jan. 29, 2017	Jan. 28, 2018	Jan. 29, 2017
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (748)	$ 6,347	$ 8,211	$ 16,136
Unrealized holding (loss) gains on investments
Unrealized holding (loss) gains on investments	(4)	(13)	60	75
Reclassification adjustment for realized loss included in net income				12
Total other comprehensive (loss) income	(4)	(13)	60	87
Comprehensive (loss) income	$ (752)	$ 6,334	$ 8,271	$ 16,223

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount after tax of other comprehensive income (loss) attributable to parent entity.

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