Income Taxes - Schedule of Income Tax Provision (Benefit) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018
Current:
U.S. federal tax	$ 1,440	$ 1,290	$ 3,321
U.S. state taxes	3	2	4
Non-U.S. foreign taxes	1,540	1,561	1,435
Current income tax provision	2,983	2,853	4,760
Deferred:
U.S. federal tax	182	(7,077)	2,185
U.S. state taxes	0	0	0
Non-U.S. foreign taxes	(1)	119	(68)
Deferred income tax provision	181	(6,958)	2,117
Provision (benefit) for income taxes	$ 3,164	$ (4,105)	$ 6,877