Acquisition-related Intangible Assets, Net

3 Months Ended

Apr. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Acquisition-related intangible assets, net consisted of the following (in thousands):



	April 30, 2018			January 31, 2018
Acquired developed technology	$	69,700		$	69,700
Customer relationship assets	1,000			1,000
	70,700			70,700
Less accumulated amortization	(41,554		)	(36,466		)
Acquisition-related intangible assets, net	$	29,146		$	34,234

Amortization expense related to acquired developed technology and customer relationship assets was $5 million for each of the three month periods ended April 30, 2018 and 2017.

As of April 30, 2018, our future estimated amortization expense related to acquired developed technology and customer relationship assets is as follows (in thousands):



Fiscal Period:
2019	$	14,998
2020	11,481
2021	1,517
2022	1,150
Total	$	29,146