Net Loss Per Share - Summary of Dilutive Securities Not Included in the Diluted Net Loss Per Common Share (Detail) - shares	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Conversion of stock, shares converted	32,145,520	9,853,193
Series A Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Conversion of stock, shares converted	477,297	477,297
Series A1 Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Conversion of stock, shares converted	7,985,305	7,537,879
Series B Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Conversion of stock, shares converted	19,770,070
Exercise of Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Conversion of stock, shares converted	3,664,601	1,004,898
Common Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Conversion of stock, shares converted	248,247	385,693
Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Conversion of stock, shares converted	0	447,426