Note 6 - Fair Value (Details) - Investment Assets Measured at Fair Value (USD $) In Thousands, unless otherwise specified	Mar. 30, 2014	Mar. 31, 2013
Assets:
Investment assets fair value	$ 157,056	$ 195,629
Liabilities:
Acquisition-related contingent consideration fair value	4,343
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Investment assets fair value	9,378	22,460
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Investment assets fair value	13,134	19,261
US Government Agencies Debt Securities [Member]
Assets:
Investment assets fair value	22,512	41,721
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Investment assets fair value	2,772	2,935
US States and Political Subdivisions Debt Securities [Member]
Assets:
Investment assets fair value	2,772	2,935
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Investment assets fair value	5	274
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Investment assets fair value	71,248	91,955
Corporate Debt Securities [Member]
Assets:
Investment assets fair value	71,253	92,229
Asset-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Investment assets fair value	27,635	30,966
Asset-backed Securities [Member]
Assets:
Investment assets fair value	27,635	30,966
Collateralized Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Investment assets fair value	28,248	22,736
Collateralized Mortgage Backed Securities [Member]
Assets:
Investment assets fair value	28,248	22,736
Altior [Member] | Fair Value, Inputs, Level 3 [Member]
Liabilities:
Acquisition-related contingent consideration fair value	2,973	10,138
Altior [Member]
Liabilities:
Acquisition-related contingent consideration fair value	2,973	10,138
Cadeka [Member] | Fair Value, Inputs, Level 3 [Member]
Liabilities:
Acquisition-related contingent consideration fair value	1,370
Cadeka [Member]
Liabilities:
Acquisition-related contingent consideration fair value	1,370
Fair Value, Inputs, Level 1 [Member]
Assets:
Investment assets fair value	14,019	27,776
Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]
Assets:
Investment assets fair value	4,636	5,042
Fair Value, Inputs, Level 2 [Member]
Assets:
Investment assets fair value	143,037	167,853
Fair Value, Inputs, Level 3 [Member]
Liabilities:
Acquisition-related contingent consideration fair value	4,343
Money Market Funds [Member]
Assets:
Investment assets fair value	$ 4,636	$ 5,042