Note 5 - Fair Value (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 28, 2014	Sep. 29, 2013	Mar. 30, 2014
Note 5 - Fair Value (Details) [Line Items]
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	$ (3,912)	$ (2,495)	$ (4,343)	$ (2,495)
Restricted Cash and Cash Equivalents, Current	26,000		26,000
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax		0	828	0
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities	0		0
CounterPath [Member]
Note 5 - Fair Value (Details) [Line Items]
Common Stock Shares Received, Dissolution (in Shares)	93,000		93,000
Altior Inc. and Cadeka Microcircuits [Member]
Note 5 - Fair Value (Details) [Line Items]
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	(3,900)
Business Combination, Contingent Consideration, Liability	0		0
Certificates of Deposit [Member]
Note 5 - Fair Value (Details) [Line Items]
Restricted Cash and Cash Equivalents, Current	$ 26,000		$ 26,000