Earnings Per Share (Details) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 27, 2015	Sep. 27, 2014	Sep. 27, 2015	Sep. 27, 2014
Earnings per share - Basic
Net earnings	$ 2,748,300	$ 3,513,600	$ 4,443,600	$ 7,185,000
Less: Distributed and undistributed earnings allocated to nonvested stock	(7,000)	(19,000)	(12,000)	(39,000)
Earnings available to common shareholders – Basic	$ 2,741,000	$ 3,495,000	$ 4,432,000	$ 7,146,000
Weighted average common shares outstanding - Basic (in shares)	8,238,000	8,279,000	8,219,000	8,252,000
Earnings per common share - Basic (in dollars per share)	$ 0.33	$ 0.42	$ 0.54	$ 0.87
Earnings per share - Diluted
Net earnings	$ 2,748,300	$ 3,513,600	$ 4,443,600	$ 7,185,000
Less: Distributed and undistributed earnings allocated to nonvested stock	7,000	19,000	8,000	29,000
Earnings available to common shareholders – Diluted	$ 2,741,000	$ 3,495,000	$ 4,436,000	$ 7,156,000
Weighted average common shares outstanding - Basic (in shares)	8,238,000	8,279,000	8,219,000	8,252,000
Effect of dilutive options (in shares)	32,000	106,000	41,000	106,000
Weighted average common shares outstanding – Diluted (in shares)	8,270,000	8,385,000	8,260,000	8,358,000
Earnings per common share - Diluted (in dollars per share)	$ 0.33	$ 0.42	$ 0.54	$ 0.86
Anti-dilutive equity awards not included above	80,000		80,000