Stockholder's Equity - Summary of Common Stock Reserved for Issuance (Details) - shares	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Dec. 31, 2021
Common stock and common stock equivalents:
Common stock (in shares)	28,489,663	12,163,673	11,152,673
Common stock and pre-funded stock warrants (in shares)	28,489,663		18,463,673
Options to purchase common stock (in shares)	1,367,493		1,311,691
Convertible preferred stock (in shares)	1,363,636		1,363,636
Total (in shares)	35,554,361		38,772,159
Common stock issuable upon exercise of pre-funded warrants
Common stock and common stock equivalents:
Warrants outstanding (in shares)	0		7,311,000
Warrants to Purchase Common Stock
Common stock and common stock equivalents:
Warrants outstanding (in shares)	4,045,278		17,507,268
Unvested Restricted Stock Awards
Common stock and common stock equivalents:
Unvested restricted stock awards/units (in shares)	891		891
Unvested Restricted Stock Units
Common stock and common stock equivalents:
Unvested restricted stock awards/units (in shares)	287,400	125,000	125,000	29,289