Consolidated Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2020	Oct. 26, 2019	Oct. 31, 2020	Oct. 26, 2019
Sales:
Product sales and other	$ 551,832	$ 718,543	$ 745,042	$ 1,020,770
Rental income	43,653	53,685	54,457	71,115
Total sales	595,485	772,228	799,499	1,091,885
Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization	452,475	553,070	618,240	791,401
Rental cost of sales	27,725	32,208	35,112	41,877
Cost of Goods and Services Sold	480,200	585,278	653,352	833,278
Gross profit	115,285	186,950	146,147	258,607
Selling and administrative expenses	91,972	113,404	162,015	211,095
Depreciation and amortization expense	13,193	15,546	27,256	31,425
Other Nonrecurring Expense	0	0	0	433
Restructuring and other charges	3,387	1,569	9,058	3,035
Operating (loss) income	6,733	56,431	(52,182)	12,619
Interest expense, net	912	1,446	3,565	3,978
Income (loss) before taxes	5,821	54,985	(55,747)	8,641
Income tax expense (benefit)	(1,694)	19,054	(16,610)	4,865
Net (loss) income	$ 7,515	$ 35,931	$ (39,137)	$ 3,776
(Loss) Earnings per share of common stock
Diluted	$ 0.15	$ 0.74	$ (0.81)	$ 0.08
Basic	$ 0.15	$ 0.75	$ (0.81)	$ 0.08
Weighted average common shares outstanding
Basic	48,804	47,853	48,608	47,717
Diluted	49,428	48,758	48,608	48,412