Income Taxes - Summary of Loss before Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Results Of Operations Income Before Income Taxes [Abstract]
U.S. operations	$ 8	$ 845	$ 1,381
Non-U.S. operations	(57,311)	(42,473)	(35,933)
Loss before income taxes	$ (57,303)	$ (41,628)	$ (34,552)