Borrowings Under Revolving Credit Facility (Details) - USD ($)	12 Months Ended
	Mar. 29, 2020	Mar. 31, 2019	Oct. 19, 2017	Oct. 18, 2017	Jun. 24, 2016
Credit Facility
Revolving line of credit	$ 25,563,900	$ 14,378,100
Revolving Credit Facility
Credit Facility
Maximum borrowing capacity			$ 75,000,000	$ 35,000,000	$ 35,000,000
Interest rate (as a percent)	3.09%	3.99%
Weighted average interest rate during the period (as a percent)	3.52%	3.71%
Interest expense	$ 1,114,900	$ 836,300
Average borrowings during period	33,755,700	22,360,200
Maximum borrowings during period	$ 56,069,900	$ 33,639,500
Commitment fee on unused portion of revolving credit facility (as a percent)	0.25%	0.25%
Revolving line of credit	$ 25,600,000	$ 14,400,000
Available borrowing capacity	49,400,000	60,600,000
Financial covenant threshold	$ 65,000,000	$ 65,000,000