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Common Stock and Stockholders' Equity (Tables)
 12 Months Ended
Jan. 31, 2020
Equity [Abstract]  
Schedule of Common Stock Reserved for Future Issuance
As of January 31, 2020, shares of common stock reserved for future issuance were as follows:
 
As of January 31, 2020
Options and unvested RSUs outstanding
17,252,543

Available for future stock option and RSU grants
16,456,003

Available for ESPP
3,653,857

 
37,362,403