Quarterly report pursuant to Section 13 or 15(d)

Stock-based compensation (Details)

v3.20.2
Stock-based compensation (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 9 Months Ended
Oct. 31, 2020
Nov. 02, 2019
Oct. 31, 2020
Nov. 02, 2019
Stock options        
Weighted-average assumptions to estimate fair value        
Volatility rate (as a percent)     43.00% 31.00%
Average risk-free interest rate (as a percent)     0.30% 2.30%
Average expected life     3 years 4 months 24 days 3 years 6 months
Dividend yield (as a percent)     0.00% 0.00%
Granted (in shares)     248 97
Stock-based compensation expense $ 2,900 $ 2,204 $ 8,247 $ 6,523
Weighted-average grant date fair value of options granted (in dollars per share)     $ 54.40 $ 89.91
Unrecognized compensation expense 20,691   $ 20,691  
Restricted stock units        
Weighted-average assumptions to estimate fair value        
Stock-based compensation expense 5,098 3,429 $ 14,446 $ 9,672
Issued (in shares)     161 52
Unrecognized compensation expense 34,048   $ 34,048  
Performance-based restricted stock units        
Weighted-average assumptions to estimate fair value        
Stock-based compensation expense 386   286 $ 2,979
Stock-based compensation benefit   $ 122    
Issued (in shares)       21
Unrecognized compensation expense $ 613   $ 613