Revenue from Contracts with Customers - Revenue Disaggregated by Geography (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2020	Oct. 31, 2019
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 6,541	$ 8,312	$ 14,814	$ 21,039
United States
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	282	1,453	2,068	3,293
Europe, Russia & CIS
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	2,001	3,769	4,981	8,936
Middle East & Africa
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	757	810	1,054	1,359
Asia-Pacific
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	3,342	1,308	5,841	4,417
Canada & Latin America
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 159	$ 972	$ 870	$ 3,034