Note 5 - Fair Value (Details) - Change in Fair Value of our Purchase Consideration Liabilities (Acquisition Related Contingent Consideration [Member], USD $)	12 Months Ended
	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013	Mar. 31, 2012
Altior [Member]
Business Acquisition, Contingent Consideration [Line Items]
Balance	$ 2,973,000	$ 10,138		$ 0
Fair value adjustment	(2,973,000)	(7,165,000)
Estimated contingent consideration liability			10,138,000
Balance	0	2,973,000	10,138	0
Cadeka Microcircuits [Member]
Business Acquisition, Contingent Consideration [Line Items]
Balance	1,370,000	0
Fair value adjustment	(1,370,000)	(3,290,000)
Estimated contingent consideration liability		4,660,000
Balance	$ 0	$ 1,370,000