Earnings Per Share (Details) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 27, 2015	Dec. 28, 2014	Dec. 27, 2015	Dec. 28, 2014
Earnings per share - Basic
Net earnings	$ 2,886,700	$ 1,681,200	$ 7,330,300	$ 8,866,200
Less: Distributed and undistributed earnings allocated to nonvested stock	(8,000)	(9,000)	(20,000)	(48,000)
Earnings available to common shareholders – Basic	$ 2,879,000	$ 1,672,000	$ 7,310,000	$ 8,818,000
Weighted average common shares outstanding - Basic (in shares)	8,245,000	8,212,000	8,228,000	8,238,000
Earnings per common share - Basic (in dollars per share)	$ 0.35	$ 0.20	$ 0.89	$ 1.07
Earnings per share - Diluted
Net earnings	$ 2,886,700	$ 1,681,200	$ 7,330,300	$ 8,866,200
Less: Distributed and undistributed earnings allocated to nonvested stock	(8,000)	(9,000)	(11,000)	(29,000)
Earnings available to common shareholders – Diluted	$ 2,879,000	$ 1,672,000	$ 7,319,000	$ 8,837,000
Weighted average common shares outstanding - Basic (in shares)	8,245,000	8,212,000	8,228,000	8,238,000
Effect of dilutive options (in shares)	37,000	113,000	35,000	101,000
Weighted average common shares outstanding – Diluted (in shares)	8,282,000	8,325,000	8,263,000	8,339,000
Earnings per common share - Diluted (in dollars per share)	$ 0.35	$ 0.20	$ 0.89	$ 1.06
Anti-dilutive equity awards not included above	100,000		100,000