Stock-based Compensation - Stock Options (Details) - Employee Stock Option [Member] - $ / shares	3 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Stock Options, Additional Disclosures
Outstanding, Number, Beginning Balance (in shares)		36,493
Granted (in shares)	0	25,000
Forfeited/Cancelled (in shares)		(21,221)
Outstanding, Number, Ending Balance (in shares)	40,272	40,272		36,493
Vested and expected to vest (in shares)	40,272	40,272
Options Exercisable (in share)	39,012	39,012
Outstanding, Weighted Average Exercise Price, Beginning Balance (in dollars per share)		$ 99.62
Granted (in dollars per share)		0.67
Forfeited/Cancelled (in dollars per share)		59.72
Outstanding, Weighted Average Exercise Price, Ending Balance (in dollars per share)	$ 59.21	59.21		$ 99.62
Vested and expected to vest (in dollars per share)	59.21	59.21
Options Exercisable (in dollars per share)	$ 58.34	$ 58.34
Options, Outstanding, Weighted Average Remaining Contractual Term (years)		8 years 8 months 12 days		8 years 6 months
Vested and expected to vest (years)		8 years 8 months 12 days
Options Exercisable (years)		8 years 8 months 12 days
Non Employee Director
Stock Options, Additional Disclosures
Granted (in shares)		25,000	5,995
Weighted average fair value per share of options granted		$ 0.45	$ 12.43
Minimum | Non Employee Director
Stock Options, Additional Disclosures
Vesting period		1 year
Maximum | 2019 Plan
Stock Options, Additional Disclosures
Expiration period		10 years
Maximum | Non Employee Director
Stock Options, Additional Disclosures
Vesting period		3 years