Intangible Assets (Tables)

6 Months Ended

Jul. 31, 2018

Goodwill And Intangible Assets Disclosure [Abstract]

Summary of Carrying Amounts of Intangible Assets

The carrying amounts of intangible assets as of July 31, 2018 and January 31, 2018 were as follows:

	As of July 31, 2018							As of January 31, 2018
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
	(in thousands)
In-process research and development	$	4,100	$	—		$	4,100	$	4,100	$	—		$	4,100
Internal-use software licenses		13,655		(5,389	)		8,266		13,404		(3,087	)		10,317
Total acquired intangible assets	$	17,755	$	(5,389	)	$	12,366	$	17,504	$	(3,087	)	$	14,417

Summary of Estimated Future Amortization Expense of Software Licenses

The estimated future amortization expense of these software licenses as of July 31, 2018 is as follows:

	As of
	July 31, 2018
Fiscal Year	(in thousands)
2019	$	2,301
2020		4,594
2021		1,371
2022		—
2023		—
Thereafter		—
Total future amortization expenses:	$	8,266