Acquisitions (Tables)

12 Months Ended

Jul. 31, 2011

Acquisitions [Abstract]

Summary of purchase price

Stock (1,524,517 shares at $18.82 per share)	$	28,691
Cash		1,808
Contingent rights		9,486
Advance on purchase price		2,000
Total consideration	$	41,985

Summary of estimated purchase price allocation

Cash and cash equivalents	$	550
Accounts receivable		2,525
Inventory		1,794
Prepaids and other assets		331
Property and equipment		265
Total tangible assets acquired		5,465

				Estimated
				Useful Lives
Amortizable intangible assets:
Existing technology		11,800		5 years
Patents/core technology		2,300		6 years
Customer contracts		1,800		6 years
Tradenames/trademarks		100		1 year
Non-compete agreements		100		2 years
In-process research and development		900
Goodwill		24,842
Total assets acquired		47,307
Liabilities		(5,322	)
Total liabilities assumed		(5,322	)
Total	$	41,985

Change in contingent rights liability

	Level 3
	Amount
	(In thousands)
Balance as of July 31, 2010	$	—
Acquisition date fair value measurement		9,486
Adjustments to fair value		(3,598	)
Balance as of July 31, 2011	$	5,888