Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation Expense - Summary of Stock Based Compensation Expense Recognized (Detail)

v3.20.1
Stock-Based Compensation Expense - Summary of Stock Based Compensation Expense Recognized (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Apr. 30, 2020
Apr. 30, 2019
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]    
Stock-based compensation expense $ 357 $ (434)
Cost of Revenue [Member]    
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]    
Stock-based compensation expense (8) (3)
Research and Development [Member]    
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]    
Stock-based compensation expense 67 68
Sales and Marketing [Member]    
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]    
Stock-based compensation expense 40 (86)
General and Administrative [Member]    
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]    
Stock-based compensation expense $ 258 $ (413)