Intangible Assets and Goodwill (Tables)

12 Months Ended

Mar. 31, 2012

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

Intangible assets consist of the following (amounts in thousands):

	March 31, 2012
	Gross Amount		Accumulated Amortization			Net Amount
Developed technology	$	94,681	$	(35,920	)	$	58,761
Customer-related	20,400		(4,633		)	15,767
Trademarks and trade names	1,730		(684		)	1,046
Backlog	2,410		(2,410		)	—
In-process technology	14,086		—			14,086
Distribution rights	5,236		(4,660		)	576
Covenants not to compete	400		(200		)	200
	$	138,943	$	(48,507	)	$	90,436

	March 31, 2011
	Gross Amount		Accumulated Amortization			Net Amount
Developed technology	$	83,751	$	(27,705	)	$	56,046
Customer-related	15,600		(1,621		)	13,979
Trademarks and trade names	1,730		(250		)	1,480
Backlog	2,410		(1,709		)	701
In-process technology	4,300		—			4,300
Distribution rights	5,236		(4,147		)	1,089
Covenants not to compete	400		(66		)	334
	$	113,427	$	(35,498	)	$	77,929

Projected Amortization Expense

$9.8 million of in-process technology which will begin amortization once the technology reaches technological feasibility. The following is an expected amortization schedule for the intangible assets for fiscal year 2013 through fiscal year 2017, absent any future acquisitions or impairment charges (amounts in thousands):

Year ending March 31,	Projected Amortization Expense
2013	$13,218
2014	13,042
2015	12,901
2016	10,784
2017	9,134

Goodwill Activity

Goodwill activity for fiscal years 2012 and 2011 was as follows (amounts in thousands):

	Semiconductor Products Reporting Unit		Technology Licensing Reporting Unit
Balance at March 31, 2010	$	40,338	$	—
Additions due to the acquisition of SST	5,761		19,200
Additions due to contingent consideration payments to previous owners of R&E International	9,747		—
Additions due to other acquisitions	972		—
Balance at March 31, 2011	56,818		19,200
Additions due to contingent consideration payments to previous owners of R&E International	120		—
Additions due to other acquisitions	17,375		—
Balance at March 31, 2012	$	74,313	$	19,200