Note 6 - Goodwill and Intangible Assets (Tables)

9 Months Ended

Dec. 27, 2015

Notes Tables

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

	December 27, 2015										March 29, 2015
	Carrying Amount		Accumulated Amortization			Impairment Charge			Net Carrying Amount		Carrying Amount		Accumulated Amortization			Impairment Charge			Net Carrying Amount
Amortized intangible assets:
Existing technology	$	114,433	$	(55,230	)	$	—		$	59,203	$	120,041	$	(47,259	)	$	(9,134	)	$	63,648
Customer relationships		14,295		(5,877	)		—			8,418		15,165		(4,520	)		(870	)		9,775
Distributor relationships		7,254		(2,616	)		—			4,638		7,254		(1,973	)		—			5,281
Patents/core technology		3,459		(3,459	)		—			—		3,459		(3,446	)		—			13
Trade names		1,330		(466	)		—			864		1,330		(274	)		—			1,056
Total intangible assets subject to amortization		140,771		(67,648	)		—			73,123		147,249		(57,472	)		(10,004	)		79,773
In-process research and development		2,803		—			(1,807	)		996		9,148		—			(2,819	)		6,329
Total	$	143,574	$	(67,648	)	$	(1,807	)	$	74,119	$	156,397	$	(57,472	)	$	(12,823	)	$	86,102

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

	Three Months Ended				Nine Months Ended
	December 27, 2015		December 28, 2014		December 27, 2015		December 28, 2014
Amortization expense	$	3,401	$	3,248	$	10,176	$	9,429

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

Amortization Expense (by fiscal year)
2016 (3 months remaining)	$	3,406
2017		13,552
2018		13,516
2019		13,203
2020		12,412
2021 and thereafter		17,034
Total future amortization	$	73,123