Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning of period	$ 233	$ 233	$ 233
Tax positions taken in prior period, gross increases	262	0	0
Tax positions taken in prior period, gross decreases	(8)	0	0
Tax positions taken in current period, gross increases	13	0	0
Currency translation effect	(7)	0	0
End of period	$ 493	$ 233	$ 233