Investments (Details 1) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Dec. 28, 2013	Mar. 30, 2013
Available-for-Sale Securities by Investment Category
Total Amortized Cost - Available-for-sale Securities	$ 19,085	$ 17,159
Gross Unrealized Gains	704	721
Gross Unrealized Losses	(452)	(182)
Total Fair Value - Available-for-sale Debt Securities	13,737	12,375
Total Fair Value - Available-for-sale Securities	19,337	17,698
U.S. Treasury and Government Agencies [Member]
Available-for-Sale Securities by Investment Category
Amortized Cost - Available-for sale Debt Securities	2,324	2,682
Gross Unrealized Gains	3	11
Gross Unrealized Losses	(95)	(6)
Total Fair Value - Available-for-sale Debt Securities	2,232	2,687
Mortgage-backed securities [Member]
Available-for-Sale Securities by Investment Category
Amortized Cost - Available-for sale Debt Securities	3,966	5,226
Gross Unrealized Gains	12	21
Gross Unrealized Losses	(248)	(108)
Total Fair Value - Available-for-sale Debt Securities	3,730	5,139
States and political subdivisions [Member]
Available-for-Sale Securities by Investment Category
Amortized Cost - Available-for sale Debt Securities	5,934	1,681
Gross Unrealized Gains	36	32
Gross Unrealized Losses	(37)	0
Total Fair Value - Available-for-sale Debt Securities	5,933	1,713
Corporate debt securities [Member]
Available-for-Sale Securities by Investment Category
Amortized Cost - Available-for sale Debt Securities	1,811	2,788
Gross Unrealized Gains	31	48
Gross Unrealized Losses	0	0
Total Fair Value - Available-for-sale Debt Securities	1,842	2,836
Marketable equity securities [Member]
Available-for-Sale Securities by Investment Category
Amortized Cost - Available-for-sale Equity Securities	5,050	4,782
Gross Unrealized Gains	622	609
Gross Unrealized Losses	(72)	(68)
Total Fair Value - Available-for-sale Equity Securities	$ 5,600	$ 5,323