Intangible Assets

9 Months Ended

Apr. 30, 2012

Intangible Assets [Abstract]

Intangible Assets

(18)Intangible Assets

Intangible assets with finite lives as of April 30, 2012 and July 31, 2011 are as follows:

	April 30, 2012
	Weighted Average Amortization Period	Gross Carrying Amount	Accumulated Amortization	Net Carrying Amount
Technologies	11.7	$     47,694,000	29,535,000	$   18,159,000
Customer relationships	10.0	29,931,000	11,494,000	18,437,000
Trademarks and other	19.8	6,044,000	2,207,000	3,837,000
Total		$     83,669,000	43,236,000	$   40,433,000

	July 31, 2011
	Weighted Average Amortization Period	Gross Carrying Amount	Accumulated Amortization	Net Carrying Amount
Technologies	10.2	$     47,694,000	27,000,000	$   20,694,000
Customer relationships	10.0	29,931,000	9,281,000	20,650,000
Trademarks and other	18.6	6,044,000	1,918,000	4,126,000
Total		$     83,669,000	38,199,000	$     45,470,000

In October 2010, we acquired the WAN optimization technology assets and assumed certain liabilities of Stampede Technologies, Inc. ("Stampede") for a purchase price of approximately $5,303,000. Almost all of the purchase price for Stampede was allocated to the estimated fair value of technologies acquired and was assigned an estimated amortizable life of five years.

As of April 30, 2012, we maintain a liability on our Condensed Consolidated Balance Sheet of approximately $3,520,000 related to contingent earn-out payments which we expect to pay based on our belief that certain revenue and related gross margin milestones will be met in future periods. Such payments are expected to be made through October 1, 2013. We estimated this liability based on a number of factors, primarily the likelihood of meeting these milestones based on forecasted revenues. We review our estimates and updated forecasts on a quarterly basis and record adjustments as required. Any adjustments are included in selling, general and administrative expenses in our Condensed Consolidated Statement of Operations and are recorded in the period in which we make such a change.

Of the remaining $3,520,000 contingent earn-out liability as of April 30, 2012, $1,164,000 is included in accrued expenses and other current liabilities and $2,356,000 is included in other long-term liabilities in our Condensed Consolidated Balance Sheet. As of April 30, 2012, we paid $1,687,000 of the total purchase price in cash, including $187,000 of earn-out payments.

Interest accreted on the contingent earn-out liability for the three months ended April 30, 2012 and 2011 was $116,000 and $118,000, respectively. Interest accreted on the contingent earn-out liability for the nine months ended April 30, 2012 and 2011 was $357,000 and $271,000, respectively, and total interest accreted through April 30, 2012 was $748,000.

Amortization expense for the three months ended April 30, 2012 and 2011 was $1,626,000 and $2,173,000 respectively. Amortization expense for the nine months ended April 30, 2012 and 2011 was $5,037,000 and $6,064,000, respectively.

The estimated amortization expense related to intangible assets with finite lives for the fiscal years ending July 31, 2012, 2013, 2014, 2015 and 2016 is $6,637,000, $6,327,000, $6,285,000, $6,211,000 and $4,962,000, respectively.