Stock Warrants - Schedule of Warrants Outstanding (Detail) - $ / shares	Sep. 30, 2023	Dec. 31, 2022
Class of Warrant or Right [Line Items]
Shares Underlying Outstanding Warrants	7,034,883	2,151,451
Weighted-average exercise price per share	$ 1.36	$ 31
Pfizer Warrants [Member]
Class of Warrant or Right [Line Items]
Shares Underlying Outstanding Warrants	0	6,320
Class C Warrants [Member]
Class of Warrant or Right [Line Items]
Shares Underlying Outstanding Warrants	1,406,977	0
Class D Warrants [Member]
Class of Warrant or Right [Line Items]
Shares Underlying Outstanding Warrants	5,627,906	0
2022 Warrants [Member]
Class of Warrant or Right [Line Items]
Shares Underlying Outstanding Warrants	0	2,034,883
2020 Warrants [Member]
Class of Warrant or Right [Line Items]
Shares Underlying Outstanding Warrants	0	110,248