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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. 25, 2017
Mar. 26, 2016
Mar. 28, 2015
Numerator:      
Net income (loss) $ 4,928 $ 5,438 $ (8,632)
Denominator:      
Weighted-average common shares outstanding 17,961 17,961 17,937
Income (loss) per common share $ 0.27 $ 0.30 $ (0.48)
Numerator:      
Net income (loss) $ 4,928 $ 5,438 $ (8,632)
Denominator:      
Weighted-average common shares outstanding 17,961 17,961 17,937
Dilutive effect of stock options and warrants 457    
Weighted-average common shares outstanding - diluted 18,418 17,961 17,937
Diluted income (loss) per common share $ 0.27 $ 0.30 $ (0.48)