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CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Feb. 26, 2023
Feb. 27, 2022
Feb. 26, 2023
Feb. 27, 2022
Income Statement [Abstract]        
Product sales $ 27,600 $ 37,399 $ 77,748 $ 90,140
Cost of product sales 21,622 24,533 58,178 58,507
Gross profit 5,978 12,866 19,570 31,633
Operating costs and expenses:        
Research and development 1,964 2,000 6,128 5,722
Selling, general and administrative 10,972 14,163 31,201 27,659
Impairment of indefinite-lived intangible assets 0 0 300 0
Gain on sale of BreatheWay 0 0 (2,108) 0
Restructuring costs 2,741 5,270 4,611 7,530
Total operating costs and expenses 15,677 21,433 40,132 40,911
Operating loss (9,699) (8,567) (20,562) (9,278)
Interest income 22 20 53 66
Interest expense (5,818) (4,105) (13,715) (13,877)
Transition services income 70 5,473 70 5,473
Other income (expense), net 34 454 (481) 642
Net loss before tax (15,391) (6,725) (34,635) (16,974)
Income tax (expense) benefit (70) 87 (78) 5,591
Net loss from continuing operations (15,461) (6,638) (34,713) (11,383)
Loss from discontinued operations before taxes (24,731) (6,859) (29,279) (49,576)
Income tax (expense) benefit 0 411 0 (157)
Loss from discontinued operations, net of tax (24,731) (6,448) (29,279) (49,733)
Net loss $ (40,192) $ (13,086) $ (63,992) $ (61,116)
Basic net loss per share:        
(Loss) income from continuing operations - basic (in dollars per share) $ (0.51) $ (0.23) $ (1.16) $ (0.39)
Loss from discontinued operations- basic (in dollars per share) (0.82) (0.22) (0.98) (1.68)
Total basic net loss per share (in dollars per share) (1.33) (0.45) (2.14) (2.07)
Diluted net loss per share:        
(Loss) income from continuing operations - diluted (in dollars per share) (0.51) (0.23) (1.16) (0.39)
Loss from discontinued operations- diluted (in dollars per share) (0.82) (0.22) (0.98) (1.68)
Total diluted net loss per share (in dollars per share) $ (1.33) $ (0.45) $ (2.14) $ (2.07)
Shares used in per share computation:        
Basic (in shares) 30,304 29,482 29,838 29,459
Diluted (in shares) 30,304 29,482 29,838 29,459
Other comprehensive income, net of tax:        
Net unrealized gain on interest rate swaps (net of tax effect of $0, $(100), $(16) and $(190)) $ 0 $ 104 $ 586 $ 646
Other comprehensive income, net 0 104 586 646
Total comprehensive loss $ (40,192) $ (12,982) $ (63,406) $ (60,470)
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]