Revenue from Contracts with Customers - Revenue Disaggregated by Geography (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 25,768	$ 0
United States
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	2,690	0
Europe, Russia & CIS
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	11,858	0
Middle East & Africa
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	1,243	0
Asia-Pacific
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	8,900	0
Canada & Latin America
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 1,077	$ 0