Note 6 - Goodwill and Intangible Assets (Tables)

9 Months Ended

Dec. 28, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill [Table Text Block]

	December 28, 2014		March 30, 2014
Beginning balance	$	30,410	$	10,356
Goodwill additions		14,461		20,054
Ending balance	$	44,871	$	30,410

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

	December 28, 2014										March 30, 2014
	Carrying Amount		Accumulated Amortization			Impairment charge			Net Carrying Amount		Carrying Amount		Accumulated Amortization			Net Carrying Amount
Amortized intangible assets:
Existing technology	$	120,026	$	(44,745	)	$	(9,134	)	$	66,147	$	63,043	$	(37,510	)	$	25,533
Customer relationships		15,165		(4,067	)		(870	)		10,228		6,095		(2,762	)		3,333
Distributor relationships		7,254		(1,759	)		—			5,495		1,264		(1,260	)		4
Patents/Core technology		3,459		(3,429	)		—			30		3,459		(3,378	)		81
Trade names		1,330		(210	)		—			1,120		210		(51	)		159
Total intangible assets subject to amortization		147,234		(54,210	)		(10,004	)		83,020		74,071		(44,961	)		29,110
In-process research and development		9,148		—			(2,280	)		6,868		2,280		—			2,280
Total	$	156,382	$	(54,210	)	$	(12,284	)	$	89,888	$	76,351	$	(44,961	)	$	31,390

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

	Three Months Ended				Nine Months Ended
	December 28, 2014		December 29, 2013		December 28, 2014		December 29, 2013
Amortization expense	$	3,248	$	1,991	$	9,249	$	5,665

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

Amortization Expense (by fiscal year)
2015 (3 months remaining)	$	3,206
2016		12,787
2017		12,819
2018		12,882
2019		12,652
2020 and thereafter		28,674
Total future amortization	$	83,020