Note 4 - Fair Value (Details) - Investment Assets Measured at Fair Value (USD $) In Thousands, unless otherwise specified	Dec. 29, 2013	Mar. 31, 2013
Assets:
Investment Assets	$ 168,663	$ 195,629
Liabilities	12,361
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Investment Assets	11,537	22,460
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Investment Assets	21,254	19,261
US Government Agencies Debt Securities [Member]
Assets:
Investment Assets	32,791	41,721
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Investment Assets	2,798	2,935
US States and Political Subdivisions Debt Securities [Member]
Assets:
Investment Assets	2,798	2,935
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Investment Assets	4	274
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Investment Assets	72,721	91,955
Corporate Debt Securities [Member]
Assets:
Investment Assets	72,725	92,229
Asset-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Investment Assets	30,354	30,966
Asset-backed Securities [Member]
Assets:
Investment Assets	30,354	30,966
Collateralized Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Investment Assets	16,034	22,736
Collateralized Mortgage Backed Securities [Member]
Assets:
Investment Assets	16,034	22,736
Altior [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Liabilities	7,741	10,138
Altior [Member]
Assets:
Liabilities	7,741	10,138
Cadeka [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Liabilities	4,620
Cadeka [Member]
Assets:
Liabilities	4,620
Fair Value, Inputs, Level 1 [Member]
Assets:
Investment Assets	25,502	27,776
Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]
Assets:
Investment Assets	13,961	5,042
Fair Value, Inputs, Level 2 [Member]
Assets:
Investment Assets	143,161	167,853
Fair Value, Inputs, Level 3 [Member]
Assets:
Liabilities	12,361
Money Market Funds [Member]
Assets:
Investment Assets	$ 13,961	$ 5,042