Basic and Diluted Net Loss Per Share - Schedule of Common Equivalent Shares were Excluded from Diluted Net Loss Per Share Calculation because their Inclusion would have been Anti-Dilutive (Details) - shares	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from diluted net loss per share	8,078,399	8,752,802
Convertible Senior Notes
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from diluted net loss per share	6,089,230	6,733,914
Stock-Based Compensation Grants
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from diluted net loss per share	1,989,169	2,018,888