Income Taxes - Provision (Details) - USD ($)	3 Months Ended								12 Months Ended
	Mar. 31, 2019	Dec. 30, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 24, 2017	Sep. 24, 2017	Jun. 25, 2017	Mar. 31, 2019	Apr. 01, 2018	Mar. 26, 2017
Federal
Current									$ 1,037,600	$ 3,073,400	$ 1,083,600
Deferred									576,200	(1,081,600)	(69,100)
State
Current									52,600	433,400	53,100
Deferred									79,000	(148,000)	(26,400)
Provision for income taxes	$ 308,200	$ 551,400	$ 481,800	$ 404,000	$ (76,800)	$ 501,900	$ 1,318,300	$ 533,800	$ 1,745,400	$ 2,277,200	$ 1,041,200