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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. 31, 2018
Mar. 25, 2017
Mar. 26, 2016
 [1]
Earnings Per Share Reconciliation [Abstract]      
Net income $ 11,699 $ 4,928 [1] $ 5,438
Net (loss) income from continuing operations $ (16,778) $ (7,056) [1] $ 225
Income per common share $ 0.65 $ 0.27 [1] $ 0.30
Denominator:      
Income (loss) per common share $ (0.93) $ (0.39) [1] $ 0.01
Net income $ 11,699 $ 4,928 [1] $ 5,438
Net (loss) income from continuing operations $ (16,778) $ (7,056) [1] $ 225
Weighted-average common shares outstanding 17,961 17,961 [1] 17,961
Dilutive effect of stock options and warrants 432 457  
Weighted-average common shares outstanding - diluted 18,393 18,418 [1] 17,961
Diluted income per common share $ 0.64 $ 0.27 [1] $ 0.30
Weighted average common shares outstanding:      
Diluted income (loss) per common share $ (0.91) $ (0.38) [1] $ 0.01
[1] Retrospectively revised (see note 18)