Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.2
Stock-Based Compensation Expense - Summary of Stock Based Compensation Expense Recognized (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jul. 31, 2021
Jul. 31, 2020
Jul. 31, 2021
Jul. 31, 2020
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Stock-based compensation expense $ 833 $ 260 $ 1,041 $ 617
Cost of Revenue [Member]        
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Stock-based compensation expense 23   24 (8)
Research and Development [Member]        
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Stock-based compensation expense (2) 68 (79) 135
Sales and Marketing [Member]        
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Stock-based compensation expense 50 55 68 95
General and Administrative [Member]        
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Stock-based compensation expense $ 762 $ 137 $ 1,028 $ 395