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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Apr. 27, 2019	Apr. 28, 2018	Apr. 29, 2017
Income Statement [Abstract]
Net sales	$ 569,704	$ 610,530	$ 586,539
Cost of sales	439,410	464,861	446,124
Gross profit	130,294	145,669	140,415
Operating expenses:
Selling	64,648	62,760	61,687
General and administrative	34,817	34,919	34,226
Product design and development	35,557	35,530	29,081
Total operating expenses	135,022	133,209	124,994
Operating (loss) income	(4,728)	12,460	15,421
Nonoperating income (expense):
Interest income	1,031	723	751
Interest expense	(160)	(217)	(230)
Other (expense) income, net	(1,087)	(537)	(354)
(Loss) income before income taxes	(4,944)	12,429	15,588
Income tax (benefit) expense	(3,986)	6,867	5,246
Net (loss) income	$ (958)	$ 5,562	$ 10,342
Weighted average shares outstanding:
Basic (in shares)	44,926	44,457	44,114
Diluted (in shares)	44,926	44,873	44,303
(Loss) earnings per share:
Basic (in dollars per share)	$ (0.02)	$ 0.13	$ 0.23
Diluted (in dollars per share)	$ (0.02)	$ 0.12	$ 0.23

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