Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2021

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 March 31,
	2021	2020
2027 Notes	12,321,900	—
Shares issuable upon exercise of stock options	11,390,231	10,192,073
Non-vested shares under restricted stock grants	4,011,189	5,395,550