Revenue from Contracts with Customers - Revenue Disaggregated by Geography (Detail) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2021	Apr. 30, 2020
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 4,194	$ 3,187
United States
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	359	1,075
Europe, Russia & CIS
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	2,582	1,376
Middle East & Africa
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	14	76
Asia-Pacific
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	705	302
Canada & Latin America
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 534	$ 358