Earnings Per Share (Details) - USD ($)	3 Months Ended								12 Months Ended
	Apr. 01, 2018	Dec. 24, 2017	Sep. 24, 2017	Jun. 25, 2017	Mar. 26, 2017	Dec. 25, 2016	Sep. 25, 2016	Jun. 26, 2016	Apr. 01, 2018	Mar. 26, 2017	Mar. 27, 2016
Earnings per share - Basic
Net earnings	$ 1,168,400	$ 1,570,200	$ 1,773,900	$ 682,900	$ (857,300)	$ 1,227,700	$ 994,200	$ 80,500	$ 5,195,400	$ 1,445,100	$ 5,340,500
Less: Distributed and undistributed earnings allocated to nonvested stock											(15,000)
Earnings available to common shareholders - Basic									$ 5,195,000	$ 1,445,000	$ 5,326,000
Weighted average common shares outstanding - Basic (in shares)									8,370,742	8,312,731	8,220,023
Basic earnings per share (in dollars per share)									$ 0.62	$ 0.17	$ 0.65
Earnings per share - Diluted
Net earnings	$ 1,168,400	$ 1,570,200	$ 1,773,900	$ 682,900	$ (857,300)	$ 1,227,700	$ 994,200	$ 80,500	$ 5,195,400	$ 1,445,100	$ 5,340,500
Less: Distributed and undistributed earnings allocated to nonvested stock											(1,000)
Earnings available to common shareholders – Diluted									$ 5,195,000	$ 1,445,000	$ 5,340,000
Weighted average common shares outstanding - Basic (in shares)									8,370,742	8,312,731	8,220,023
Effect of dilutive options (in shares)									100,263	27,686
Diluted weighted-average common shares outstanding (in shares)									8,471,005	8,340,417	8,220,023
Diluted earnings per share (in dollars per share)	$ 0.14	$ 0.19	$ 0.21	$ 0.08	$ (0.10)	$ 0.15	$ 0.12	$ 0.01	$ 0.61	$ 0.17	$ 0.65
Anti-dilutive equity awards (in shares)									40,000	60,000	100,000
Stock Options
Earnings per share - Diluted
Anti-dilutive equity awards (in shares)									40,000	60,000	100,000
Options outstanding (in shares)	540,000				420,000				540,000	420,000	100,000
Performance Stock Units
Earnings per share - Diluted
Anti-dilutive equity awards (in shares)									0	0	0