Stock Warrants - Schedule of Warrants Outstanding (Detail)

Stock Warrants - Schedule of Warrants Outstanding (Detail) - $ / shares	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	May 27, 2020
Class of Warrant or Right [Line Items]
Shares Underlying Outstanding Warrants	7,151,451	2,151,451
Weighted-average exercise price per share	$ 10.32	$ 31
Pfizer Warrants [Member]
Class of Warrant or Right [Line Items]
Shares Underlying Outstanding Warrants	6,320	6,320
Exercise Prices			$ 392
Exercise Price Four Point Zero Zero [Member]
Class of Warrant or Right [Line Items]
Shares Underlying Outstanding Warrants	678,294
Exercise Prices	$ 4
Exercise Price Three Nine Two Point Zero Zero [Member]
Class of Warrant or Right [Line Items]
Shares Underlying Outstanding Warrants	116,568
Exercise Prices	$ 392
Expiration Start Date	May 27, 2023
Excercise Price Four Point Zero Zero Expiry Date Fourteenth Of February Two Thousand And Twenty Eight [Member]
Class of Warrant or Right [Line Items]
Shares Underlying Outstanding Warrants	1,356,589
Exercise Prices	$ 4
Expiration Start Date	Feb. 14, 2028
Excercise Price Four Point Zero Zero Expiry Date Second Of March Two Thousand And Twenty Eight [Member]
Class of Warrant or Right [Line Items]
Shares Underlying Outstanding Warrants	5,000,000
Exercise Prices	$ 4
Expiration Start Date	Mar. 02, 2028
Minimum [Member] \| Exercise Price Four Point Zero Zero [Member]
Class of Warrant or Right [Line Items]
Expiration Start Date	Aug. 14, 2023
2023 Warrants [Member]
Class of Warrant or Right [Line Items]
Shares Underlying Outstanding Warrants	5,000,000	0
2022 Warrants [Member]
Class of Warrant or Right [Line Items]
Shares Underlying Outstanding Warrants	2,034,883	2,034,883
2020 Warrants [Member]
Class of Warrant or Right [Line Items]
Shares Underlying Outstanding Warrants	110,248	110,248

Quarterly report pursuant to Section 13 or 15(d)

Stock Warrants - Schedule of Warrants Outstanding (Detail)