Quarterly report pursuant to Section 13 or 15(d)

Stock-based compensation - Assumptions for grant date fair value of the stock options (Details)

v3.22.1
Stock-based compensation - Assumptions for grant date fair value of the stock options (Details) - Stock Options
3 Months Ended
Apr. 30, 2022
$ / shares
Assumptions for grant date fair value of the stock options  
Risk-free interest rates 1.00%
Volatility factor, minimum 30.00%
Volatility factor, maximum 31.00%
Expected lives (years) 6 years 1 month 6 days
Weighted average fair value of options granted $ 3.36