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Significant Accounting Policies - Basic and Diluted Earnings Per Common Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Mar. 26, 2022
Mar. 27, 2021
Mar. 28, 2020
Numerator:      
Net (loss) income $ 1,287 $ (5,838) $ (12,779)
Net loss from continuing operations $ 1,287 $ (5,838) $ (12,227)
Denominator:      
Weighted-average common shares outstanding 18,346 18,005 17,968
(Loss) income per common share $ 0.07 $ (0.32) $ (0.71)
Loss from continuing operations per common share $ 0.07 $ (0.32) $ (0.68)
Numerator:      
Net (loss) income $ 1,287 $ (5,838) $ (12,779)
Net loss from continuing operations $ 1,287 $ (5,838) $ (12,227)
Denominator:      
Weighted-average common shares outstanding 18,346 18,005 17,968
Dilutive effect of stock options and warrants 448 0
Weighted-average common shares outstanding – diluted 18,794 18,005 17,968
Diluted (loss) income per common share $ 0.07 $ (0.32) $ (0.71)
Diluted loss from continuing operations per common share $ 0.07 $ (0.32) $ (0.68)