Disaggregated Revenue and Geographic Information - Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020
Segment Reporting Information [Line Items]
Total revenue	$ 21,999	$ 67,154
North America [Member]
Segment Reporting Information [Line Items]
Total revenue	$ 10,198	$ 40,072
North America [Member] | Customer Concentration Risk [Member] | Total Revenue [Member]
Segment Reporting Information [Line Items]
% of total revenues	46.00%	60.00%
Europe and Middle East [Member]
Segment Reporting Information [Line Items]
Total revenue	$ 8,495	$ 15,829
Europe and Middle East [Member] | Customer Concentration Risk [Member] | Total Revenue [Member]
Segment Reporting Information [Line Items]
% of total revenues	39.00%	24.00%
Latin America [Member]
Segment Reporting Information [Line Items]
Total revenue	$ 2,519	$ 9,639
Latin America [Member] | Customer Concentration Risk [Member] | Total Revenue [Member]
Segment Reporting Information [Line Items]
% of total revenues	11.00%	14.00%
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Total revenue	$ 787	$ 1,614
Asia Pacific [Member] | Customer Concentration Risk [Member] | Total Revenue [Member]
Segment Reporting Information [Line Items]
% of total revenues	4.00%	2.00%