Net Loss Per Share - Effect of Anti-dilutive Securities (Detail) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Effect of Anti-dilutive Securities	16,238,902	10,468,676	16,115,816	10,690,131
Employee Stock Option and Restricted Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Effect of Anti-dilutive Securities	10,266,921	9,948,564	10,143,835	10,110,820
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Effect of Anti-dilutive Securities	496,612	520,112	496,612	579,311
Common Stock Issuable in Connection with Convertible Senior Notes [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Effect of Anti-dilutive Securities	5,475,369		5,475,369