Intangible Assets Including Goodwill (Tables)

6 Months Ended

Oct. 30, 2011

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill [Table Text Block]

The following table reflects the changes to the carrying amount of goodwill (in thousands):

	Total
Balance at April 30, 2011	$	—
Addition related to acquisition of subsidiary (Note 3)	83,107
Balance at July 31, 2011	$	83,107
Purchase price allocation adjustment	(171		)
Balance at October 30, 2011	$	82,936

Schedule of Finite-Lived Intangible Assets by Major Class [Text Block]

The following table reflects intangible assets subject to amortization as of October 30, 2011 and April 30, 2011 (in thousands):

	October 30, 2011
	Gross Carrying		Accumulated			Net Carrying
	Amount		Amortization			Amount
Purchased technology	$	92,564	$	(72,090	)	$	20,474
Purchased trade name	1,972		(1,196		)	776
Purchased customer relationships	32,090		(7,498		)	24,592
Purchased internal use software, backlog and in-process research and development	1,480		(216		)	1,264
Purchased patents	375		(175		)	200
Total	$	128,481	$	(81,175	)	$	47,306

	April 30, 2011
	Gross Carrying		Accumulated			Net Carrying
	Amount		Amortization			Amount
Purchased technology	$	76,264	$	(68,932	)	$	7,332
Purchased trade name	1,172		(1,172		)	—
Purchased customer relationships	15,970		(6,100		)	9,870
Purchased patents	375		(138		)	237
Total	$	93,781	$	(76,342	)	$	17,439

Schedule of Expected Amortization Expense [Table Text Block]

Estimated remaining amortization expense for each of the next five fiscal years ending April 30, is as follows (in thousands):

Year	Amount
2012 (remainder of year)	$	4,915
2013	8,205
2014	6,474
2015	5,537
2016 and beyond	22,175
Total	$	47,306