Income Taxes - Schedule of Loss Before Provision For Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2019		Jan. 31, 2018		Jan. 31, 2017
Income Tax Disclosure [Abstract]
United States	$ (90,408)		$ (107,701)		$ (115,640)
Foreign	(42,806)		(46,544)		(35,233)
Loss before provision for income taxes	$ (133,214)	[1]	$ (154,245)	[2]	$ (150,873)	[2]

[1] As reported under ASC Topic 606

[2] As reported under ASC Topic 605