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 9 Months Ended
Oct. 31, 2021
Oct. 31, 2020
Oct. 31, 2021
Oct. 31, 2020
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Stock-based compensation expense $ 274 $ 437 $ 1,315 $ 1,054
Cost of Revenue [Member]        
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Stock-based compensation expense 4   28 (8)
Research and Development [Member]        
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Stock-based compensation expense 7 80 (72) 215
Sales and Marketing [Member]        
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Stock-based compensation expense 21 25 89 120
General and Administrative [Member]        
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Stock-based compensation expense $ 242 $ 332 $ 1,270 $ 727