Revenue from Contracts with Customers - Revenue Disaggregated by Geography (Detail) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 3,212	$ 5,982
United States
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	1,100	756
Europe, Russia & CIS
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	1,376	2,604
Middle East & Africa
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	76	191
Asia-Pacific
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	302	1,274
Canada & Latin America
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 358	$ 1,157