Note 5 - Goodwill and Intangible Assets (Tables)

9 Months Ended

Dec. 29, 2013

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill [Table Text Block]

	December 29, 2013		March 31, 2013
Beginning balance	$	10,356	$	3,184
Goodwill additions		19,217		7,172
Ending balance	$	29,573	$	10,356

Schedule of Finite-Lived Intangible Assets [Table Text Block]

	December29, 2013							March 31, 2013
	Carrying Amount		Accumulated Amortization			Net  Carrying Amount		Carrying Amount		Accumulated Amortization			Net Carrying Amount
Amortized intangible assets:
Existing technology	$	58,588	$	(35,647	)	$	22,941	$	42,858	$	(30,668	)	$	12,190
Customer relationships		5,075		(2,539	)		2,536		2,905		(2,079	)		826
Patents/Core technology		3,459		(3,328	)		131		3,459		(3,182	)		277
Distributor relationships		1,264		(1,264	)		—		1,264		(1,219	)		45
Tradenames		210		(35	)		175		—		—			—
Total intangible assets subject to amortization		68,596		(42,813	)		25,783		50,486		(37,148	)		13,338
In-process research and development		2,280		—			2,280		—		—			—
Total	$	70,876	$	(42,813	)	$	28,063	$	50,486	$	(37,148	)	$	13,338

Finite-lived Intangible Assets Amortization Expense [Table Text Block]

	Three Months Ended				Nine Months Ended
	December 29, 2013		December 30, 2012		December 29, 2013		December 30, 2012
Amortization expense	$	1,991	$	994	$	5,665	$	3,155

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

Amortization Expense (by fiscal year)
2014 (3 months remaining)	$	1,991
2015		6,039
2016		4,863
2017		3,449
2018		3,255
2019 and thereafter		6,186
Total future amortization	$	25,783