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CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Nov. 27, 2022
Nov. 28, 2021
Nov. 27, 2022
Nov. 28, 2021
Income Statement [Abstract]        
Product sales $ 38,802 $ 43,452 $ 82,157 $ 85,084
Cost of product sales 31,694 28,737 68,797 59,934
Gross profit 7,108 14,715 13,360 25,150
Operating costs and expenses:        
Research and development 2,118 1,856 4,166 3,729
Selling, general and administrative 10,773 8,012 21,435 17,482
Impairment of indefinite-lived intangible assets 1,300 0 1,300 0
Restructuring costs 823 707 1,870 2,541
Total operating costs and expenses 15,014 10,575 28,771 23,752
Operating (loss) income (7,906) 4,140 (15,411) 1,398
Interest income 16 19 31 46
Interest expense (4,219) (3,094) (7,897) (9,772)
Other income (expense), net (336) 79 (515) 188
Net (loss) income before tax (12,445) 1,144 (23,792) (8,140)
Income tax (expense) benefit (4) 3,085 (8) 4,736
Net (loss) income from continuing operations (12,449) 4,229 (23,800) (3,404)
Loss from discontinued operations before taxes 0 (42,409) 0 (44,714)
Income tax (expense) benefit 0 (261) 0 200
Loss from discontinued operations, net of tax 0 (42,670) 0 (44,514)
Net loss $ (12,449) $ (38,441) $ (23,800) $ (47,918)
Basic net loss per share:        
Loss from continuing operations - basic (in dollars per share) $ (0.42) $ 0.14 $ (0.80) $ (0.12)
Loss from discontinued operations- basic (in dollars per share) 0 (1.45) 0 (1.51)
Total basic net loss per share (in dollars per share) (0.42) (1.30) (0.80) (1.63)
Diluted net loss per share:        
(Loss) income from continuing operations - diluted (in dollars per share) (0.42) 0.14 (0.80) (0.12)
Loss from discontinued operations- diluted (in dollars per share) 0 (1.45) 0 (1.51)
Total diluted net loss per share (in dollars per share) $ (0.42) $ (1.30) $ (0.80) $ (1.63)
Shares used in per share computation:        
Basic (in shares) 29,634 29,471 29,605 29,448
Diluted (in shares) 29,634 29,471 29,605 29,448
Other comprehensive income, net of tax:        
Net unrealized gain on interest rate swaps (net of tax effect of $0, $(100), $(16) and $(190)) $ 286 $ 176 $ 586 $ 542
Other comprehensive income, net 286 176 586 542
Total comprehensive loss $ (12,163) $ (38,265) $ (23,214) $ (47,376)
Revenue from Contract with Customer, Product and Service [Extensible Enumeration] Product [Member] Product [Member] Product [Member] Product [Member]
Cost, Product and Service [Extensible Enumeration] Product [Member] Product [Member] Product [Member] Product [Member]