Note 6 - Goodwill and Intangible Assets (Details) - Purchased Intangible Assets (USD $) In Thousands, unless otherwise specified	Jun. 29, 2014	Mar. 30, 2014
Amortized intangible assets:
Carrying Amount	$ 145,959	$ 74,071
Accumulated Amortization	(47,238)	(44,961)
Net Carrying Amount	98,721	29,110
Total	156,279	76,351
Total	(47,238)	(44,961)
Total	109,041	31,390
Technology-Based Intangible Assets [Member]
Amortized intangible assets:
Carrying Amount	118,781	63,043
Accumulated Amortization	(39,357)	(37,510)
Net Carrying Amount	79,424	25,533
Total	(39,357)	(37,510)
Customer Relationships [Member]
Amortized intangible assets:
Carrying Amount	15,145	6,095
Accumulated Amortization	(3,082)	(2,762)
Net Carrying Amount	12,063	3,333
Total	(3,082)	(2,762)
Distribution Rights [Member]
Amortized intangible assets:
Carrying Amount	7,244	1,264
Accumulated Amortization	(1,322)	(1,260)
Net Carrying Amount	5,922	4
Total	(1,322)	(1,260)
Patents [Member]
Amortized intangible assets:
Carrying Amount	3,459	3,459
Accumulated Amortization	(3,395)	(3,378)
Net Carrying Amount	64	81
Total	(3,395)	(3,378)
Trade Names [Member]
Amortized intangible assets:
Carrying Amount	1,330	210
Accumulated Amortization	(82)	(51)
Net Carrying Amount	1,248	159
Total	(82)	(51)
In Process Research and Development [Member]
Amortized intangible assets:
In-process research and development	$ 10,320	$ 2,280