Summary of Significant Accounting Policies - Summary of Potentially Dilutive Securities Excluded from Calculation of Diluted Net Loss Per Share (Detail) - shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Warrants to purchase common stock	3,341,681	2,874,455
Warrants to purchase common stock [Member]
Warrants to purchase common stock	14,440	64,440
Options to purchase common stock [Member]
Warrants to purchase common stock	3,288,791	2,797,550
Employee stock purchase plan [Member]
Warrants to purchase common stock	14,135	12,465
Restricted stock awards [Member]
Warrants to purchase common stock	24,315