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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

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