XML 53 R42.htm IDEA: XBRL DOCUMENT v3.20.2
Stockholders' Equity - Additional Information (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
6 Months Ended
Jul. 31, 2020
Jul. 31, 2019
ESPP    
Stockholders Equity Note Disclosure [Line Items]    
Number of shares of common stock issued under ESPP 0.1 0.1
Weighted purchase price of shares of common stock under ESPP $ 9.98 $ 9.86
Stock Options    
Stockholders Equity Note Disclosure [Line Items]    
Aggregate intrinsic value of vested options exercised $ 0.9 $ 1.8
Weighted-average grant date fair value of options granted $ 4.72 $ 7.13