Benefit Plans and Stock-Based Compensation - Summary of Status of Stock Options (Detail) - $ / shares
 12 Months Ended
Mar. 28, 2020
Mar. 30, 2019
Mar. 31, 2018
Mar. 25, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options outstanding, Weighted average exercise price $ 1.13 $ 1.14 $ 1.13 $ 1.13
Options Outstanding [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options outstanding, Number outstanding 704,818      
Options outstanding, Weighted average remaining life (years) 4 years 2 months 12 days      
Options outstanding, Weighted average exercise price $ 1.13      
Options Outstanding [Member] | Range One [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options outstanding, Number outstanding 165,000      
Options outstanding, Weighted average remaining life (years) 5 years 6 months      
Options outstanding, Weighted average exercise price $ 0.78      
Options Outstanding [Member] | Range Two [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options outstanding, Number outstanding 100,000      
Options outstanding, Weighted average remaining life (years) 3 years 1 month 6 days      
Options outstanding, Weighted average exercise price $ 0.84      
Options Outstanding [Member] | Range Three [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options outstanding, Number outstanding 25,000      
Options outstanding, Weighted average remaining life (years) 2 years 7 months 6 days      
Options outstanding, Weighted average exercise price $ 0.89      
Options Outstanding [Member] | Range Four [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options outstanding, Number outstanding 150,000      
Options outstanding, Weighted average remaining life (years) 1 year 9 months 18 days      
Options outstanding, Weighted average exercise price $ 1.04      
Options Outstanding [Member] | Range Five [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options outstanding, Number outstanding 2,818      
Options outstanding, Weighted average remaining life (years) 0 years      
Options outstanding, Weighted average exercise price $ 1.05      
Options Outstanding [Member] | Range Six [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options outstanding, Number outstanding 30,000      
Options outstanding, Weighted average remaining life (years) 6 months      
Options outstanding, Weighted average exercise price $ 1.25      
Options Outstanding [Member] | Range Seven [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options outstanding, Number outstanding 142,000      
Options outstanding, Weighted average remaining life (years) 6 years 7 months 6 days      
Options outstanding, Weighted average exercise price $ 1.43      
Options Outstanding [Member] | Range Eight [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options outstanding, Number outstanding 40,000      
Options outstanding, Weighted average remaining life (years) 3 years 6 months      
Options outstanding, Weighted average exercise price $ 1.66      
Options Outstanding [Member] | Range Nine [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options outstanding, Number outstanding 50,000      
Options outstanding, Weighted average remaining life (years) 4 years 9 months 18 days      
Options outstanding, Weighted average exercise price $ 1.94      
Options Exercisable [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options exercisable, Number exercisable 704,818      
Options exercisable, Weighted average exercise price $ 1.13      
Options Exercisable [Member] | Range One [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options exercisable, Number exercisable 165,000      
Options exercisable, Weighted average exercise price $ 0.78      
Options Exercisable [Member] | Range Two [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options exercisable, Number exercisable 100,000      
Options exercisable, Weighted average exercise price $ 0.84      
Options Exercisable [Member] | Range Three [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options exercisable, Number exercisable 25,000      
Options exercisable, Weighted average exercise price $ 0.89      
Options Exercisable [Member] | Range Four [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options exercisable, Number exercisable 150,000      
Options exercisable, Weighted average exercise price $ 1.04      
Options Exercisable [Member] | Range Five [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options exercisable, Number exercisable 2,818      
Options exercisable, Weighted average exercise price $ 1.05      
Options Exercisable [Member] | Range Six [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options exercisable, Number exercisable 30,000      
Options exercisable, Weighted average exercise price $ 1.25      
Options Exercisable [Member] | Range Seven [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options exercisable, Number exercisable 142,000      
Options exercisable, Weighted average exercise price $ 1.43      
Options Exercisable [Member] | Range Eight [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options exercisable, Number exercisable 40,000      
Options exercisable, Weighted average exercise price $ 1.66      
Options Exercisable [Member] | Range Nine [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options exercisable, Number exercisable 50,000      
Options exercisable, Weighted average exercise price $ 1.94