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Consolidated Statements of Changes in Stockholders' Equity (deficiency) - USD ($)
 12 Months Ended
Mar. 25, 2023
Mar. 26, 2022
Mar. 27, 2021
Mar. 27, 2021
Statement [Line Items]        
Beginning Balance $ 5,864,000 $ (1,422,000) $ 3,410,000  
Beginning Balance, Shares 18,513,413 18,328,943    
Net income/loss $ (7,432,000) $ 1,287,000 (5,838,000)  
Cumulative translation adjustment [1],[2] (6,000) 67,000 130,000  
Total other comprehensive (loss) income $ (7,438,000) $ 1,354,000 (5,708,000)  
Exercise of stock options     876,000  
Exercise of stock options, Shares 225,000 138,147   226,853
Modification of certain awards from cash settled to equity settled   $ 5,495,000    
Exercise of stock options and warrants $ 422,000 174,000    
Ending Balance $ (603,000) $ 5,864,000 $ (1,422,000) $ (1,422,000)
Ending Balance, Shares 18,830,969 18,513,413 18,328,943 18,328,943
Management [Member]        
Statement [Line Items]        
Compensation expense resulting from stock options and stock appreciation rights granted to Management $ 549,000 $ 263,000    
Voting Common Stock Outstanding [Member]        
Statement [Line Items]        
Beginning Balance, Shares 18,515,913 18,328,943 17,970,881  
Exercise of stock options, Shares     358,062  
Exercise of stock options and warrants, Shares 315,056 186,970    
Ending Balance, Shares 18,830,969 18,515,913 18,328,943 18,328,943
Voting Common Stock [Member]        
Statement [Line Items]        
Beginning Balance $ 95,638,000 $ 95,116,000 $ 93,368,000  
Exercise of stock options     1,748,000  
Exercise of stock options and warrants 1,136,000 522,000    
Ending Balance 96,774,000 95,638,000 95,116,000 $ 95,116,000
Additional Paid-in Capital [Member]        
Statement [Line Items]        
Beginning Balance 23,669,000 18,259,000 19,131,000  
Exercise of stock options     (872,000)  
Modification of certain awards from cash settled to equity settled   5,495,000    
Exercise of stock options and warrants (714,000) (348,000)    
Ending Balance 23,504,000 23,669,000 18,259,000 18,259,000
Additional Paid-in Capital [Member] | Management [Member]        
Statement [Line Items]        
Compensation expense resulting from stock options and stock appreciation rights granted to Management 549,000 263,000    
Accumulated Deficit [Member]        
Statement [Line Items]        
Beginning Balance (113,413,000) (114,700,000) (108,862,000)  
Net income/loss (7,432,000) 1,287,000 (5,838)  
Ending Balance (120,845,000) (113,413,000) (114,700,000) (114,700,000)
Accumulated Other Comprehensive Income (Loss) [Member]        
Statement [Line Items]        
Beginning Balance (30,000) (97,000) (227,000)  
Cumulative translation adjustment [2] (6,000) 67,000 130,000  
Ending Balance $ (36,000) $ (30,000) $ (97,000) $ (97,000)
[1] Item that may be reclassified to the Statement of Operations in future periods
[2] The change in cumulative translation adjustments is not due to reclassifications out of accumulated other comprehensive income (loss).