Note 4. Intangible Assets

The following schedule presents the details of intangible assets as of July 31, 2017 (dollar amounts in thousands):

	July 31, 2017
	Gross							Remaining
	carrying		Accumulated					useful life
	amount		amortization			Net		(in years)
Existing technology	$	3,880	$	(3,121	)	$	759		1.2
Database		4,939		(3,809	)		1,130		2.4
Customer contracts and relationships		33,643		(7,008	)		26,635		8.0
Software		10,867		(4,646	)		6,221		2.7
Brand		1,141		(598	)		543		1.7
	$	54,470	$	(19,182	)	$	35,288

The following schedule presents the details of intangible assets as of January 31, 2017 (dollar amounts in thousands):

	January 31, 2017
	Gross							Remaining
	carrying		Accumulated					useful life
	amount		amortization			Net		(in years)
Existing technology	$	3,880	$	(2,733	)	$	1,147		1.6
Database		4,939		(3,291	)		1,648		2.5
Customer contracts and relationships		33,643		(5,245	)		28,398		8.5
Software		10,867		(3,481	)		7,386		3.2
Brand		1,141		(437	)		704		2.2
	$	54,470	$	(15,187	)	$	39,283

Amortization expense associated with intangible assets was $2.0 million and $4.0 million for the three and six months ended July 31, 2017, respectively, and $2.1 million and $4.1 million for the three and six months ended July 31, 2016, respectively.

The estimated amortization expense for intangible assets, for the next five years and thereafter is as follows as of July 31, 2017 (in thousands):

	Estimated
	amortization
Period	expense
Fiscal 2018	$	3,800
Fiscal 2019		6,966
Fiscal 2020		6,062
Fiscal 2021		3,629
Fiscal 2022		3,182
Thereafter		11,649
Total	$	35,288