Intangible Assets

3 Months Ended

Oct. 31, 2015

Finite-Lived Intangible Assets, Net [Abstract]

Intangible assets with finite lives as of October 31, 2015 and July 31, 2015 are as follows:



	October 31, 2015
	Weighted Average Amortization Period	Gross Carrying Amount		Accumulated Amortization	Net Carrying Amount
Technologies	13.0	$	47,370,000	39,846,000	$	7,524,000
Customer relationships	10.0	29,831,000		21,718,000	8,113,000
Trademarks and other	20.0	5,794,000		2,798,000	2,996,000
Total		$	82,995,000	64,362,000	$	18,633,000



	July 31, 2015
	Weighted Average Amortization Period	Gross Carrying Amount		Accumulated Amortization	Net Carrying Amount
Technologies	12.1	$	47,370,000	39,266,000	$	8,104,000
Customer relationships	10.0	29,831,000		20,981,000	8,850,000
Trademarks and other	20.0	5,794,000		2,739,000	3,055,000
Total		$	82,995,000	62,986,000	$	20,009,000

The weighted average amortization period in the above table excludes fully amortized intangible assets.

Amortization expense for the three months ended October 31, 2015 and 2014 was $1,376,000 and $1,561,000, respectively.

The estimated amortization expense for the fiscal years ending July 31, 2016, 2017, 2018, 2019, and 2020 is $4,962,000, $4,782,000, $4,782,000, $862,000 and $862,000, respectively.