Stockholders' Equity (Tables)

12 Months Ended

Jan. 31, 2018

Equity [Abstract]

Summary of Reserved Shares of Common Stock for Future Issuance

As of January 31, 2018, we had reserved shares of common stock for future issuance as follows:

	January 31, 2018
Shares underlying outstanding stock options	46,359,949
Shares underlying outstanding restricted stock units	17,682,646
Shares reserved for future equity awards	19,684,916
Shares reserved for future employee stock purchase plan awards	2,489,767
Total	86,217,278