Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Summary of Common Stock Reserved for Future Issuance (Details)

v3.10.0.1
Stock-Based Compensation - Summary of Common Stock Reserved for Future Issuance (Details) - shares
Oct. 31, 2018
Jul. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Common Stock options outstanding (within the 2011 Plan and outside of the terms of the 2011 Plan) 7,525,203 8,912,720
Common Stock reserved for restricted stock unit release 518,020  
Common Stock authorized for future grant under the 2011 Plan 2,200,176  
Common Stock reserved for warrant exercise 8,928,905  
Commons Stock reserved for future ESPP issuance 410,903  
Total common stock reserved for future issuance 19,583,207