Income Taxes - Reconciliation of Income Taxes by Jurisdiction (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 31, 2020	Oct. 31, 2019	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2019	Oct. 31, 2018	Jul. 31, 2018	Apr. 30, 2018	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018
(Loss) income before income taxes is attributable to the following jurisdictions:
Domestic									$ (12,808)	$ (6,025)	$ (12,246)
Foreign									2,399	(13,563)	(7,913)
Loss before income taxes	$ (2,993)	$ (1,968)	$ (3,088)	$ (2,360)	$ (4,176)	$ (5,440)	$ (4,504)	$ (5,468)	(10,409)	(19,588)	(20,159)
Current:
Domestic									27	9	(225)
Foreign									582	619	1,156
Total									609	628	931
Deferred:
Domestic									0	0	(36)
Foreign									269	(376)	15
Total									269	(376)	(21)
Income tax expense	$ 715	$ 60	$ 48	$ 55	$ (21)	$ (249)	$ 85	$ 437	$ 878	$ 252	$ 910