Correction of Errors in Previously Reported Fiscal Year 2022 and 2021 Annual Financial Statements - Income Statement (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended											6 Months Ended			9 Months Ended			12 Months Ended
	May 28, 2023	Feb. 26, 2023	Nov. 27, 2022	Aug. 28, 2022	May 29, 2022	Feb. 27, 2022	Nov. 28, 2021	Aug. 29, 2021	Feb. 28, 2021	Nov. 29, 2020	Aug. 30, 2020	Nov. 27, 2022	Nov. 28, 2021	Nov. 29, 2020	Feb. 26, 2023	Feb. 27, 2022	Feb. 28, 2021	May 28, 2023	May 29, 2022	May 30, 2021
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Product sales	$ 31,145	$ 26,536	$ 21,864	$ 23,724	$ 28,107	$ 35,232	$ 25,601	$ 22,330	$ 27,807	$ 23,792	$ 22,675	$ 45,587						$ 103,269	$ 111,270	$ 100,874
Cost of product sales		17,988	16,185	17,745		23,593	14,143	16,785	16,877	13,018	17,381	33,929						75,284	72,204	61,937
Gross profit	7,779	8,548	5,679	5,979	10,424	11,639	11,458	5,545	10,930	10,774	5,294	11,658						27,985	39,066	38,937
Operating costs and expenses:
Research and development		2,234	2,177	2,211		2,254	1,680	1,689	1,637	1,591	1,739	4,388						8,736	7,839	6,684
Selling, general and administrative		10,279	8,291	8,103		13,749	5,461	6,951	7,149	6,710	7,490	16,395						38,969	34,659	27,721
Legal settlement charge																				0
Impairment of goodwill and long-lived and indefinite-lived assets			0									0							0
Loss on disposal of property and equipment related to restructuring, net		2,566	563	1,047		5,274	627	1,128	2,071	1,099	6,667	1,610						4,184	8,359	13,355
Total operating costs and expenses		15,079	11,031	9,253		21,277	7,768	9,768	10,857	9,400	15,896	20,285						49,781	50,857	47,760
Operating (loss) income		(6,531)	(5,352)	(3,274)		(9,638)	3,690	(4,223)	73	1,374	(10,602)	(8,627)						(21,796)	(11,791)	(8,823)
Dividend income										0	0
Interest income		22	16	15		20	19	27	13	10	8	31						68	81	48
Interest expense		(4,855)	(3,624)	(3,246)		(3,676)	(2,767)	(6,130)	(2,562)	(1,596)	(1,665)	(6,870)						(17,649)	(15,551)	(8,933)
Loss on debt extinguishment																				(1,110)
Transition services income		78	24	44		5,473			(1,110)			68						349	5,814	0
Other income (expense), net		26	(261)	(242)		290	330	46	305	(9,706)	(1,519)	(502)						(1,159)	760	(10,969)
Net loss from continuing operations before taxes		(11,260)	(9,197)	(6,703)		(7,531)	1,272	(10,280)	(3,281)	(9,918)	(13,778)	(15,900)						(63,928)	(20,687)	(29,787)
Income tax provision (benefit)		(70)	(4)	(4)		(3,389)	6,275	1,807	1,530	1,528	3,788	(8)						(308)	5,211	6,350
Net loss from continuing operations	(36,998)	(11,330)	(9,201)	(6,707)	(3,630)	(10,920)	7,547	(8,473)	(1,751)	(8,390)	(9,990)	(15,908)						(64,236)	(15,476)	(23,437)
Discontinued operations:
Loss from discontinued operations		(25,177)	(3,605)	(4,259)		(6,552)	(42,591)	(1,196)	(4,304)	(4,037)	(3,239)	(7,864)						(35,327)	(101,929)	(10,289)
Income tax benefit						3,886	(3,427)	282	(923)	804	819							0	690	1,432
Loss from discontinued operations	$ (2,286)	(25,177)	(3,605)	(4,259)	$ (51,641)	(2,666)	(46,018)	(914)	(5,227)	(3,233)	(2,420)	(7,864)						(35,327)	(101,239)	(8,857)
Net loss		$ (36,507)	$ (12,806)	$ (10,966)		$ (13,586)	$ (38,471)	$ (9,387)	$ (6,978)	$ (11,623)	$ (12,410)	$ (23,772)	$ (47,858)		$ (60,279)	$ (61,444)	$ (31,011)	$ (99,563)	$ (116,715)	$ (32,294)
Basic net loss per share:
Loss from continuing operations (in dollars per share)	$ (1.23)	$ (0.37)	$ (0.31)	$ (0.23)	$ (0.12)	$ (0.37)	$ 0.25	$ (0.29)	$ (0.06)	$ (0.29)	$ (0.34)	$ (0.54)						$ (2.14)	$ (0.53)	$ (0.80)
Loss from discontinued operations (in dollars per share)	(0.09)	(0.83)	(0.12)	(0.14)	(1.76)	(0.09)	(1.56)	(0.03)	(0.18)	(0.11)	(0.08)	(0.26)						(1.18)	(3.44)	(0.30)
Total basic net loss per share (in dollars per share)	(1.32)	(1.20)	(0.43)	(0.37)	(1.88)	(0.46)	(1.31)	(0.32)	(0.24)	(0.40)	(0.42)	(0.80)						(3.32)	(3.97)	(1.10)
Diluted net loss per share:
Loss from continuing operations (in dollars per share)	(1.23)	(0.37)	(0.31)	(0.23)	(0.12)	(0.37)	0.25	(0.29)	(0.06)	(0.29)	(0.34)	(0.54)						(2.14)	(0.53)	(0.80)
Loss from discontinued operations (in dollars per share)	(0.09)	(0.83)	(0.12)	(0.14)	(1.76)	(0.09)	(1.56)	(0.03)	(0.18)	(0.11)	(0.08)	(0.26)						(1.18)	(3.44)	(0.30)
Total diluted net loss per share (in dollars per share)	$ (1.32)	$ (1.20)	$ (0.43)	$ (0.37)	$ (1.88)	$ (0.46)	$ (1.31)	$ (0.32)	$ (0.24)	$ (0.40)	$ (0.42)	$ (0.80)	$ (1.63)	$ (0.82)	$ (2.02)	$ (2.09)	$ (1.06)	$ (3.32)	$ (3.97)	$ (1.10)
Shares used in per share computation:
Basic (in shares)		30,304	29,634	29,577		29,482	29,471	29,424	29,323	29,280	29,242	29,605						29,958	29,466	29,294
Diluted (in shares)		30,304	29,634	29,577		29,482	29,471	29,424	29,323	29,280	29,242	29,605	29,448	29,261	29,838	29,459	29,282	29,958	29,466	29,294
Discontinued Operations
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Product sales		$ 1,270	$ 17,111	$ 19,652		$ 2,169	$ 17,889	$ 19,302				$ 36,764							$ 74,556	$ 71,164
Cost of product sales		1,371	16,789	19,436		1,733	15,210	14,752				36,226							67,115	60,163
Gross profit		(101)	322	216		436	2,679	4,550				538							7,441	11,001
Operating costs and expenses:
Research and development		6	90	79		34	176	184				169							523	739
Selling, general and administrative		640	2,459	4,369		589	2,633	2,751				6,828							11,073	10,396
Legal settlement charge																				0
Impairment of goodwill and long-lived and indefinite-lived assets			1,300									1,300							46,089
Loss on disposal of property and equipment related to restructuring, net		0	0	0		0	0	0				0							0	0
Total operating costs and expenses		646	3,849	4,448		623	2,809	2,935				8,297							57,685	11,135
Operating (loss) income		(747)	(3,527)	(4,232)		(187)	(130)	1,615				(7,759)							(50,244)	(134)
Interest income		0	0	0		0	0	0				0							0	0
Interest expense		0	0	0		0	0	0				0							0	0
Loss on debt extinguishment																				0
Transition services income		0	0	0		0						0							0
Other income (expense), net		0	0	0		0	0	0				0							0	0
Net loss from continuing operations before taxes		(747)	(3,527)	(4,232)		(187)	(130)	1,615				(7,759)							(50,244)	(134)
Income tax provision (benefit)		0	0	0		1,462	(1,043)	(289)				0							447	452
Net loss from continuing operations		(747)	(3,527)	(4,232)		1,275	(1,173)	1,326				(7,759)							(49,797)	318
Discontinued operations:
Loss from discontinued operations		747	3,527	4,232		187	130	(1,615)				7,759							50,244	134
Income tax benefit						(1,462)	1,043	289											(447)	(452)
Loss from discontinued operations		747	3,527	4,232		(1,275)	1,173	(1,326)				7,759							49,797	(318)
Net loss		$ 0	$ 0	$ 0		$ 0	$ 0	$ 0				$ 0							$ 0	$ 0
Basic net loss per share:
Loss from continuing operations (in dollars per share)		$ (0.02)	$ (0.12)	$ (0.14)		$ 0.04	$ (0.04)	$ 0.05				$ (0.26)							$ (1.69)	$ 0.01
Loss from discontinued operations (in dollars per share)		0.02	0.12	0.14		(0.04)	0.04	(0.05)				0.26							1.69	(0.01)
Total basic net loss per share (in dollars per share)		0	0	0		0	0	0				0							0	0
Diluted net loss per share:
Loss from continuing operations (in dollars per share)		(0.02)	(0.12)	(0.14)		0.04	(0.04)	0.05				(0.26)							(1.69)	0.01
Loss from discontinued operations (in dollars per share)		0.02	0.12	0.14		(0.04)	0.04	(0.05)				0.26							1.69	(0.01)
Total diluted net loss per share (in dollars per share)		$ 0	$ 0	$ 0		$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0		$ 0	$ 0
Shares used in per share computation:
Basic (in shares)		0	0	0		0	0	0				0							0	0
Diluted (in shares)		0	0	0		0	0	0	0	0	0	0	0	0	0	0	0		0	0
As Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Product sales																			$ 185,786	$ 171,546
Cost of product sales																			135,416	121,075
Gross profit																			50,370	50,471
Operating costs and expenses:
Research and development																			7,841	7,423
Selling, general and administrative																			46,127	37,660
Legal settlement charge																				1,763
Impairment of goodwill and long-lived and indefinite-lived assets																			46,089
Loss on disposal of property and equipment related to restructuring, net																			8,961	3,759
Total operating costs and expenses																			109,018	50,605
Operating (loss) income																			(58,648)	(134)
Interest income																			81	48
Interest expense																			(17,357)	(10,387)
Loss on debt extinguishment																				(1,110)
Transition services income																			5,814
Other income (expense), net																			641	111
Net loss from continuing operations before taxes																			(69,469)	(11,472)
Income tax provision (benefit)																			5,945	1,903
Net loss from continuing operations																			(63,524)	(9,569)
Discontinued operations:
Loss from discontinued operations																			(51,276)	(28,994)
Income tax benefit																			121	5,898
Loss from discontinued operations																			(51,155)	(23,096)
Net loss				$ (11,351)				$ (9,477)			$ (11,000)	$ (23,800)	$ (47,918)	$ (24,301)	$ (63,992)		$ (29,799)		$ (114,679)	$ (32,665)
Basic net loss per share:
Loss from continuing operations (in dollars per share)																			$ (2.16)	$ (0.33)
Loss from discontinued operations (in dollars per share)																			(1.74)	(0.79)
Total basic net loss per share (in dollars per share)																			(3.90)	(1.12)
Diluted net loss per share:
Loss from continuing operations (in dollars per share)																			(2.16)	(0.33)
Loss from discontinued operations (in dollars per share)																			(1.74)	(0.79)
Total diluted net loss per share (in dollars per share)		$ (1.33)	$ (0.42)	$ (0.38)		$ (0.45)	$ (1.30)	$ (0.32)	$ (0.19)	$ (0.45)	$ (0.38)	$ (0.80)	$ (1.63)	$ (0.83)	$ (2.14)		$ (1.02)		$ (3.90)	$ (1.12)
Shares used in per share computation:
Basic (in shares)																			29,466	29,294
Diluted (in shares)		30,304	29,634	29,577		29,482	29,471	29,424	29,323	29,280	29,242	29,605	29,448	29,261	29,838		29,282		29,466	29,294
Restatement
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Product sales																			$ 40	$ 492
Cost of product sales																			3,903	1,025
Gross profit																			(3,863)	(533)
Operating costs and expenses:
Research and development																			521	0
Selling, general and administrative																			(395)	457
Legal settlement charge																				(1,763)
Impairment of goodwill and long-lived and indefinite-lived assets																			0
Loss on disposal of property and equipment related to restructuring, net																			(602)	9,596
Total operating costs and expenses																			(476)	8,290
Operating (loss) income																			(3,387)	(8,823)
Interest income																			0	0
Interest expense																			1,806	1,454
Loss on debt extinguishment																				0
Transition services income																			0
Other income (expense), net																			119	(11,080)
Net loss from continuing operations before taxes																			(1,462)	(18,449)
Income tax provision (benefit)																			(287)	4,899
Net loss from continuing operations																			(1,749)	(13,550)
Discontinued operations:
Loss from discontinued operations																			(409)	18,839
Income tax benefit																			122	(4,918)
Loss from discontinued operations																			(287)	13,921
Net loss				$ 385				$ 90			$ (1,410)	$ 28	$ 60	$ 268	$ 3,713		$ (1,212)		$ (2,036)	$ 371
Basic net loss per share:
Loss from continuing operations (in dollars per share)																			$ (0.06)	$ (0.46)
Loss from discontinued operations (in dollars per share)																			(0.01)	0.48
Total basic net loss per share (in dollars per share)																			(0.07)	0.02
Diluted net loss per share:
Loss from continuing operations (in dollars per share)																			(0.06)	(0.46)
Loss from discontinued operations (in dollars per share)																			(0.01)	0.48
Total diluted net loss per share (in dollars per share)		$ 0.13	$ (0.01)	$ 0.01		$ (0.01)	$ (0.01)	$ 0	$ (0.05)	$ 0.05	$ (0.04)	$ 0	$ 0	$ 0.01	$ 0.12		$ (0.04)		$ (0.07)	$ 0.02
Shares used in per share computation:
Basic (in shares)																			0	0
Diluted (in shares)		0	0	0		0	0	0	0	0	0	0	0	0	0		0		0	0
As Restated
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Product sales																			$ 185,826	$ 172,038
Cost of product sales																			139,319	122,100
Gross profit																			46,507	49,938
Operating costs and expenses:
Research and development																			8,362	7,423
Selling, general and administrative																			45,732	38,117
Legal settlement charge																				0
Impairment of goodwill and long-lived and indefinite-lived assets																			46,089
Loss on disposal of property and equipment related to restructuring, net																			8,359	13,355
Total operating costs and expenses																			108,542	58,895
Operating (loss) income																			(62,035)	(8,957)
Interest income																			81	48
Interest expense																			(15,551)	(8,933)
Loss on debt extinguishment																				(1,110)
Transition services income																			5,814
Other income (expense), net																			760	(10,969)
Net loss from continuing operations before taxes																			(70,931)	(29,921)
Income tax provision (benefit)																			5,658	6,802
Net loss from continuing operations																			(65,273)	(23,119)
Discontinued operations:
Loss from discontinued operations																			(51,685)	(10,155)
Income tax benefit																			243	980
Loss from discontinued operations																			(51,442)	(9,175)
Net loss														$ (24,033)					$ (116,715)	$ (32,294)
Basic net loss per share:
Loss from continuing operations (in dollars per share)																			$ (2.22)	$ (0.79)
Loss from discontinued operations (in dollars per share)																			(1.75)	(0.31)
Total basic net loss per share (in dollars per share)																			(3.97)	(1.10)
Diluted net loss per share:
Loss from continuing operations (in dollars per share)																			(2.22)	(0.79)
Loss from discontinued operations (in dollars per share)																			(1.75)	(0.31)
Total diluted net loss per share (in dollars per share)		$ (1.20)	$ (0.43)	$ (0.37)		$ (0.46)	$ (1.31)	$ (0.32)	$ (0.24)	$ (0.40)	$ (0.42)	$ (0.80)	$ (1.63)	$ (0.82)	$ (2.02)		$ (1.06)		$ (3.97)	$ (1.10)
Shares used in per share computation:
Basic (in shares)																			29,466	29,294
Diluted (in shares)		30,304	29,634	29,577		29,482	29,471	29,424	29,323	29,280	29,242	29,605	29,448	29,261	29,838		29,282		29,466	29,294