XML 29 R18.htm IDEA: XBRL DOCUMENT v3.20.2
Summary of Significant Accounting Policies (Tables)
9 Months Ended
Sep. 30, 2020
Accounting Policies [Abstract]  
Schedule of Potentially Dilutive Securities not Included in Calculation of Diluted Net Loss Per Share
The table below provides potentially dilutive securities not included in the calculation of the diluted net loss per share because to do so would be anti-dilutive:
As of September 30,
20202019
2027 Notes12,321,900 — 
Shares issuable upon exercise of stock options10,266,895 8,099,861 
Non-vested shares under restricted stock grants4,530,998 5,053,169