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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 26, 2019	Jan. 27, 2018	Jan. 26, 2019	Jan. 27, 2018
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (3,319)	$ (6,189)	$ 9,861	$ 9,372
Other comprehensive (loss) income:
Cumulative translation adjustments	134	1,228	(1,560)	2,289
Unrealized gain (loss) on available-for-sale securities, net of tax	55	(50)	48	(83)
Total other comprehensive (loss) income, net of tax	189	1,178	(1,512)	2,206
Comprehensive (loss) income	$ (3,130)	$ (5,011)	$ 8,349	$ 11,578

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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 and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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