Note 6 - Goodwill and Intangible Assets (Tables)

6 Months Ended

Sep. 28, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill [Table Text Block]

	September 28, 2014		March 30, 2014
Beginning balance	$	30,410	$	10,356
Goodwill additions		14,696		20,054
Ending balance	$	45,106	$	30,410

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

	September 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	$	118,794	$	(42,268	)	$	(9,134	)	$	67,392	$	63,043	$	(37,510	)	$	25,533
Customer relationships		15,165		(3,600	)		(870	)		10,695		6,095		(2,762	)		3,333
Distributor relationships		7,254		(1,536	)		—			5,718		1,264		(1,260	)		4
Patents/Core technology		3,459		(3,412	)		—			47		3,459		(3,378	)		81
Trade names		1,330		(146	)		—			1,184		210		(51	)		159
Total intangible assets subject to amortization		146,002		(50,962	)		(10,004	)		85,036		74,071		(44,961	)		29,110
In-process research and development		10,380		—			(2,280	)		8,100		2,280		—			2,280
Total	$	156,382		(50,962	)		(12,284	)		93,136		76,351		(44,961	)		31,390

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

	Three Months Ended				Six Months Ended
	September 28, 2014		September 29, 2013		September 28, 2014		September 29, 2013
Amortization expense	$	3,724	$	2,130	$	6,001	$	3,674

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

Amortization Expense (by fiscal year)
2015 (6 months remaining)	$	6,406
2016		12,696
2017		12,609
2018		12,572
2019		12,248
2020 and thereafter		28,505
Total future amortization	$	85,036