Acquisition-related Intangible Assets, Net

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



	April 30, 2017			January 31, 2017
Acquired developed technology	$	64,900		$	64,900
Customer relationship assets	1,000			1,000
	65,900			65,900
Less accumulated amortization	(21,985		)	(17,113		)
Acquisition-related intangible assets, net	$	43,915		$	48,787

Amortization expense related to acquired developed technology and customer relationship assets was $5 million and $1 million for the three months ended April 30, 2017 and 2016, respectively.

As of April 30, 2017, our future estimated amortization expense related to acquired developed technology and customer relationship assets is as follows (in thousands):



Fiscal Period:
2018	$	14,414
2019	18,904
2020	10,281
2021	316
Total	$	43,915