Income Taxes - Schedule of Income Tax Provision (Benefit) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017
Current:
U.S. federal tax	$ 1,290	$ 3,321	$ 818
U.S. state taxes	2	4	(212)
Non-U.S. foreign taxes	1,561	1,435	1,454
Current income tax provision	2,853	4,760	2,060
Deferred:
U.S. federal tax	(7,077)	2,185	1,174
U.S. state taxes	0	0	0
Non-U.S. foreign taxes	119	(68)	(163)
Deferred income tax provision	(6,958)	2,117	1,011
Provision (benefit) for income taxes	$ (4,105)	$ 6,877	$ 3,071