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Unaudited Quarterly Consolidated Financial Information - Statement of Equity (Details) - USD ($)
$ 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
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
Increase (Decrease) in Temporary Equity [Roll Forward]                                      
Convertible Preferred Stock, beginning balance (in shares) 39,000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Convertible Preferred Stock, beginning balance $ 38,535 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0
Proceeds of Convertible Preferred Stock, net of issuance costs (in shares)   39,000                             39,000    
Proceeds of Convertible Preferred Stock, net of issuance costs   $ 38,082                             $ 38,082    
Accretion of Convertible Preferred Stock   25                             73    
Convertible Preferred Stock Paid in Kind (PIK) dividend   $ 428                             $ 1,163    
Convertible Preferred Stock, ending balance (in shares) 39,000 39,000 0 0 0 0 0 0 0 0 0 0 0 39,000 0 0 39,000 0 0
Convertible Preferred Stock, ending balance $ 39,318 $ 38,535 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 38,535 $ 0 $ 0 $ 39,318 $ 0 $ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                      
Beginning balance (in shares)       29,513,000             29,513,000     29,513,000     29,513,000    
Beginning balance $ 35,021 71,143 77,875 $ 87,823 155,424 193,117 201,946 207,997 218,539 229,835 $ 87,823 201,946 229,835 $ 87,823 201,946 229,835 $ 87,823 201,946 229,835
Convertible Preferred Stock Paid in Kind (PIK) dividend                           (428)     (1,163) 0 0
Issuance of stock under stock plans, net of shares withheld                                   1  
Taxes paid by Company for employee stock plans   (65) (142) (67) (6) (84) (428)   (215) (82)             (274) (789) (405)
Stock-based compensation   903 1,108 785 622 686 620 797 895 892             3,612 2,608 3,360
Accretion of Convertible Preferred Stock   (25)                             (73)    
Net loss   (36,507) (12,806) (10,966) (13,586) (38,471) (9,387) (6,978) (11,623) (12,410) (23,772) (47,858) (24,033) (60,279) (61,444) (31,011) (99,563) (116,715) (32,294)
Other comprehensive income, net of tax     286 300 104 176 366 387 401 304 586 542 705 586 646 1,092 586 $ 772 1,450
Issuance of shares to Wynnefield Capital, Inc., net of issuance costs     4,822                           $ 4,822    
Ending balance (in shares) 30,322,000                               30,322,000 29,513,000  
Ending balance $ (4,230) $ 35,021 $ 71,143 $ 77,875 $ 142,558 $ 155,424 $ 193,117 $ 202,203 $ 207,997 $ 218,539 $ 71,143 $ 155,424 $ 207,997 $ 35,021 $ 142,558 $ 202,203 $ (4,230) $ 87,823 $ 201,946
As Reported                                      
Increase (Decrease) in Temporary Equity [Roll Forward]                                      
Convertible Preferred Stock, beginning balance (in shares) 39,000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Convertible Preferred Stock, beginning balance $ 38,510 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0
Proceeds of Convertible Preferred Stock, net of issuance costs (in shares)   39,000                                  
Proceeds of Convertible Preferred Stock, net of issuance costs   $ 38,082                                  
Convertible Preferred Stock Paid in Kind (PIK) dividend   $ 428                                  
Convertible Preferred Stock, ending balance (in shares)   39,000 0 0 0 0 0 0 0 0 0 0 0 39,000 0 0   0 0
Convertible Preferred Stock, ending balance   $ 38,510 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 38,510 $ 0 $ 0   $ 0 $ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                      
Beginning balance 34,207 74,167 80,364 90,697 156,202 193,865 202,784 208,938 221,158 231,044 90,697 202,784 231,044 90,697 202,784 231,044 90,697 202,784 231,044
Convertible Preferred Stock Paid in Kind (PIK) dividend   (428)                       (428)          
Issuance of stock under stock plans, net of shares withheld                                   1  
Taxes paid by Company for employee stock plans   (65) (142) (67) (6) (84) (428)   (215) (82)               (789) (405)
Stock-based compensation   903 1,108 785 622 686 620 797 895 892               2,608 3,360
Net loss   (40,192) (12,449) (11,351) (13,086) (38,441) (9,477) (5,498) (13,301) (11,000) (23,800) (47,918) (24,301) (63,992)   (29,799)   (114,679) (32,665)
Other comprehensive income, net of tax     286 300 104 176 366 387 401 304 586 542 705 586   1,092   772 1,450
Issuance of shares to Wynnefield Capital, Inc., net of issuance costs   (178) 5,000                                
Ending balance   34,207 74,167 80,364 143,724 156,202 193,865 204,624 208,938 221,158 74,167 156,202 208,938 34,207 143,724 204,624   90,697 202,784
As Reported | After Discontinued Operations Restatement                                      
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                      
Net loss                             (61,116)        
Other comprehensive income, net of tax                             646        
Ending balance         143,836                   143,836        
Restatement                                      
Increase (Decrease) in Temporary Equity [Roll Forward]                                      
Accretion of Convertible Preferred Stock   25                                  
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                      
Beginning balance 814 (3,024) (2,489) (2,874) (778) (748) (838) (941) (2,619) (1,209) (2,874) (838) (1,209) (2,874) (838) (1,209) (2,874) (838) (1,209)
Convertible Preferred Stock Paid in Kind (PIK) dividend                           0          
Accretion of Convertible Preferred Stock   (25)                                  
Net loss   3,685 (357) 385 (500) (30) 90 (1,480) 1,678 (1,410) 28 60 268 3,713   (1,212)   (2,036) 371
Other comprehensive income, net of tax     0 0 0 0 0 0 0 0 0 0 0 0   0   0 0
Issuance of shares to Wynnefield Capital, Inc., net of issuance costs     (178)                                
Ending balance   814 (3,024) (2,489) (1,166) (778) (748) (2,421) (941) (2,619) (3,024) (778) (941) 814 (1,166) (2,421)   (2,874) (838)
Restatement | After Discontinued Operations Restatement                                      
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                      
Net loss                             (328)        
Other comprehensive income, net of tax                             0        
As Restated                                      
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                      
Beginning balance $ 35,021 71,143 77,875 87,823 155,424 193,117 201,946 207,997 218,539   87,823 201,946   87,823 201,946   $ 87,823 201,946  
Convertible Preferred Stock Paid in Kind (PIK) dividend   (428)                                  
Net loss   (36,507) (12,806) (10,966) (13,586) (38,471) (9,387) (6,978) (11,623) (12,410) (23,772) (47,858) (24,033) (60,279)   (31,011)   (116,715) (32,294)
Other comprehensive income, net of tax     286 300 104 176 366 387 401 304 586 542 705 586   1,092   772 1,450
Ending balance   $ 35,021 $ 71,143 $ 77,875 $ 142,558 $ 155,424 $ 193,117 $ 202,203 $ 207,997 $ 218,539 $ 71,143 $ 155,424 $ 207,997 $ 35,021 142,558 $ 202,203   $ 87,823 $ 201,946
As Restated | After Discontinued Operations Restatement                                      
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                      
Net loss                             (61,444)        
Other comprehensive income, net of tax                             $ 646        
Common Stock                                      
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                      
Beginning balance (in shares) 30,319,000 30,297,000 29,593,000 29,513,000 29,481,000 29,462,000 29,333,000 29,323,000 29,242,000 29,224,000 29,513,000 29,333,000 29,224,000 29,513,000 29,333,000 29,224,000 29,513,000 29,333,000 29,224,000
Beginning balance $ 30 $ 30 $ 30 $ 30 $ 29 $ 29 $ 29 $ 29 $ 29 $ 29 $ 30 $ 29 $ 29 $ 30 $ 29 $ 29 $ 30 $ 29 $ 29
Issuance of stock under stock plans, net of shares withheld (in shares)   22,000 76,000 80,000 1,000 19,000 129,000   81,000 18,000             181,000 180,000 109,000
Issuance of stock under stock plans, net of shares withheld                                   $ 1  
Issuance of shares to Wynnefield Capital, Inc., net of issuance costs (in shares)     628,000                           628,000    
Ending balance (in shares) 30,322,000 30,319,000 30,297,000 29,593,000 29,482,000 29,481,000 29,462,000 29,323,000 29,323,000 29,242,000 30,297,000 29,481,000 29,323,000 30,319,000 29,482,000 29,323,000 30,322,000 29,513,000 29,333,000
Ending balance $ 30 $ 30 $ 30 $ 30 $ 29 $ 29 $ 29 $ 29 $ 29 $ 29 $ 30 $ 29 $ 29 $ 30 $ 29 $ 29 $ 30 $ 30 $ 29
Common Stock | As Reported                                      
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                      
Beginning balance (in shares) 30,319,000 30,297,000 29,593,000 29,513,000 29,481,000 29,462,000 29,333,000 29,323,000 29,242,000 29,224,000 29,513,000 29,333,000 29,224,000 29,513,000 29,333,000 29,224,000 29,513,000 29,333,000 29,224,000
Beginning balance $ 30 $ 30 $ 30 $ 30 $ 29 $ 29 $ 29 $ 29 $ 29 $ 29 $ 30 $ 29 $ 29 $ 30 $ 29 $ 29 $ 30 $ 29 $ 29
Issuance of stock under stock plans, net of shares withheld (in shares)   22,000 76,000 80,000 1,000 19,000 129,000   81,000 18,000               180,000 109,000
Issuance of stock under stock plans, net of shares withheld                                   $ 1  
Issuance of shares to Wynnefield Capital, Inc., net of issuance costs (in shares)     628,000                                
Ending balance (in shares)   30,319,000 30,297,000 29,593,000 29,482,000 29,481,000 29,462,000 29,323,000 29,323,000 29,242,000 30,297,000 29,481,000 29,323,000 30,319,000 29,482,000 29,323,000   29,513,000 29,333,000
Ending balance   $ 30 $ 30 $ 30 $ 29 $ 29 $ 29 $ 29 $ 29 $ 29 $ 30 $ 29 $ 29 $ 30 $ 29 $ 29   $ 30 $ 29
Additional Paid-in Capital                                      
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                      
Beginning balance 174,243 173,858 168,070 167,352 166,327 165,725 165,533 164,068 163,388 162,578 167,352 165,533 162,578 167,352 165,533 162,578 167,352 165,533 162,578
Convertible Preferred Stock Paid in Kind (PIK) dividend   (428)                             (1,163)    
Taxes paid by Company for employee stock plans   (65) (142) (67) (6) (84) (428)   (215) (82)             (274) (789) (405)
Stock-based compensation   903 1,108 785 622 686 620 797 895 892             3,612 2,608 3,360
Accretion of Convertible Preferred Stock   (25)                             (73)    
Issuance of shares to Wynnefield Capital, Inc., net of issuance costs     4,822                           4,822    
Ending balance 174,276 174,243 173,858 168,070 166,943 166,327 165,725 164,865 164,068 163,388 173,858 166,327 164,068 174,243 166,943 164,865 174,276 167,352 165,533
Additional Paid-in Capital | As Reported                                      
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                      
Beginning balance 174,268 174,036 168,070 167,352 166,327 165,725 165,533 164,068 163,388 162,578 167,352 165,533 162,578 167,352 165,533 162,578 167,352 165,533 162,578
Convertible Preferred Stock Paid in Kind (PIK) dividend   (428)                                  
Taxes paid by Company for employee stock plans   (65) (142) (67) (6) (84) (428)   (215) (82)               (789) (405)
Stock-based compensation   903 1,108 785 622 686 620 797 895 892               2,608 3,360
Issuance of shares to Wynnefield Capital, Inc., net of issuance costs   (178) 5,000                                
Ending balance   174,268 174,036 168,070 166,943 166,327 165,725 164,865 164,068 163,388 174,036 166,327 164,068 174,268 166,943 164,865   167,352 165,533
Additional Paid-in Capital | Restatement                                      
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                      
Accretion of Convertible Preferred Stock   (25)                                  
Issuance of shares to Wynnefield Capital, Inc., net of issuance costs     (178)                                
Retained Earnings (Accumulated Deficit)                                      
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                      
Beginning balance (139,252) (102,745) (89,939) (78,973) (10,116) 28,355 37,742 46,003 57,626 70,036 (78,973) 37,742 70,036 (78,973) 37,742 70,036 (78,973) 37,742 70,036
Net loss   (36,507) (12,806) (10,966) (13,586) (38,471) (9,387) (6,978) (11,623) (12,410)             (99,563) (116,715) (32,294)
Ending balance (178,536) (139,252) (102,745) (89,939) (23,702) (10,116) 28,355 39,025 46,003 57,626 (102,745) (10,116) 46,003 (139,252) (23,702) 39,025 (178,536) (78,973) 37,742
Retained Earnings (Accumulated Deficit) | As Reported                                      
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                      
Beginning balance (140,091) (99,899) (87,450) (76,099) (9,338) 29,103 38,580 46,944 60,245 71,245 (76,099) 38,580 71,245 (76,099) 38,580 71,245 (76,099) 38,580 71,245
Net loss   (40,192) (12,449) (11,351) (13,086) (38,441) (9,477) (5,498) (13,301) (11,000)               (114,679) (32,665)
Ending balance   (140,091) (99,899) (87,450) (22,424) (9,338) 29,103 41,446 46,944 60,245 (99,899) (9,338) 46,944 (140,091) (22,424) 41,446   (76,099) 38,580
Retained Earnings (Accumulated Deficit) | Restatement                                      
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                      
Beginning balance   (2,846) (2,489) (2,874) (666) (748) (838) (941) (2,619) (1,209) (2,874) (838) (1,209) (2,874) (838) (1,209) (2,874) (838) (1,209)
Net loss   3,685 (357) 385 (500) (30) 90 (1,480) 1,678 (1,410)               (2,036) 371
Ending balance     (2,846) (2,489)   (666) (748)   (941) (2,619) (2,846) (666) (941)         (2,874) (838)
Accumulated Other Comprehensive Loss                                      
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                      
Beginning balance 0 0 (286) (586) (816) (992) (1,358) (2,103) (2,504) (2,808) (586) (1,358) (2,808) (586) (1,358) (2,808) (586) (1,358) (2,808)
Other comprehensive income, net of tax     286 300 104 176 366 387 401 304             586 772 1,450
Ending balance 0 0 0 (286) (712) (816) (992) (1,716) (2,103) (2,504) 0 (816) (2,103) 0 (712) (1,716) 0 (586) (1,358)
Accumulated Other Comprehensive Loss | As Reported                                      
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                      
Beginning balance $ 0 0 (286) (586) (816) (992) (1,358) (2,103) (2,504) (2,808) (586) (1,358) (2,808) (586) (1,358) (2,808) $ (586) (1,358) (2,808)
Other comprehensive income, net of tax     286 300 104 176 366 387 401 304               772 1,450
Ending balance   $ 0 $ 0 $ (286) $ (712) $ (816) $ (992) $ (1,716) $ (2,103) $ (2,504) $ 0 $ (816) $ (2,103) $ 0 $ (712) $ (1,716)   $ (586) $ (1,358)