Investments (Details 1) (USD $)	6 Months Ended	12 Months Ended
	Sep. 27, 2014	Mar. 29, 2014
Available-for-Sale Securities by Investment Category
Available-for-sale Securities, Amortized Cost Basis	$ 19,542,000	$ 19,132,000
Total Amortized Cost - Available-for-sale Securities	19,542,000	19,132,000
Gross Unrealized Gains	1,013,000	951,000
Gross Unrealized Losses	(237,000)	(281,000)
Total Fair Value - Available-for-sale Debt Securities	14,463,000	13,530,000
Total Fair Value - Available-for-sale Securities	20,318,000	19,802,000
U.S. Treasury and Government Agencies [Member]
Available-for-Sale Securities by Investment Category
Amortized Cost - Available-for sale Debt Securities	1,977,000	2,318,000
Gross Unrealized Gains	0	1,000
Gross Unrealized Losses	(27,000)	(46,000)
Total Fair Value - Available-for-sale Debt Securities	1,950,000	2,273,000
Mortgage-backed securities [Member]
Available-for-Sale Securities by Investment Category
Amortized Cost - Available-for sale Debt Securities	3,361,000	3,754,000
Gross Unrealized Gains	14,000	13,000
Gross Unrealized Losses	(69,000)	(149,000)
Total Fair Value - Available-for-sale Debt Securities	3,306,000	3,618,000
States and political subdivisions [Member]
Available-for-Sale Securities by Investment Category
Amortized Cost - Available-for sale Debt Securities	6,131,000	5,923,000
Gross Unrealized Gains	234,000	155,000
Gross Unrealized Losses	(12,000)	(13,000)
Total Fair Value - Available-for-sale Debt Securities	6,353,000	6,065,000
Corporate debt securities [Member]
Available-for-Sale Securities by Investment Category
Amortized Cost - Available-for sale Debt Securities	2,845,000	1,550,000
Gross Unrealized Gains	11,000	24,000
Gross Unrealized Losses	(2,000)	0
Total Fair Value - Available-for-sale Debt Securities	2,854,000	1,574,000
Marketable equity securities [Member]
Available-for-Sale Securities by Investment Category
Amortized Cost - Available-for-sale Equity Securities	4,178,000	4,537,000
Gross Unrealized Gains	754,000	758,000
Gross Unrealized Losses	(127,000)	(73,000)
Total Fair Value - Available-for-sale Equity Securities	4,805,000	5,222,000
Certificates of Deposit [Member]
Available-for-Sale Securities by Investment Category
Available-for-sale Securities, Amortized Cost Basis	1,050,000	1,050,000
Total Amortized Cost - Available-for-sale Securities	1,050,000	1,050,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Total Fair Value - Available-for-sale Securities	$ 1,050,000	$ 1,050,000