Stock-Based Compensation, Stock Options (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Stock-Based Compensation Expense Items [Abstract]
Stock-based compensation expense	$ 670,000	$ 862,000
Minimum [Member]
Additional Disclosures [Abstract]
Award vesting period	1 year
Maximum [Member]
Additional Disclosures [Abstract]
Award vesting period	4 years
Selling, General and Administrative [Member]
Stock-Based Compensation Expense Items [Abstract]
Stock-based compensation expense	$ 630,000	784,000
Research and Development [Member]
Stock-Based Compensation Expense Items [Abstract]
Stock-based compensation expense	$ 40,000	$ 78,000
Stock Options [Member]
Stock Options Activity [Roll Forward]
Outstanding, beginning balance (in shares)	10,485	7,481
Granted (in shares)	127,353	5,833
Exercised (in shares)	0	0
Forfeited/expired (in shares)	(26,922)	(2,829)
Outstanding, ending balance (in shares)	110,916	10,485
Vested at the end of the year (in shares)	8,882	3,531
Weighted Average Exercise Price [Abstract]
Outstanding, beginning balance (in dollars per share)	$ 404.08	$ 656.05
Granted (in dollars per share)	6.38	83.96
Exercised (in dollars per share)	0	0
Forfeited/expired (in dollars per share)	39.68	410.34
Outstanding, ending balance (in dollars per share)	35.9	404.08
Vested at the end of the year (in dollars per share)	$ 293.89	$ 727.26
Weighted Average Remaining Contractual Term [Abstract]
Options outstanding, weighted average remaining contractual life	9 years 2 months 4 days	9 years 2 months 4 days
Options vested, weighted average remaining contractual life	8 years 9 months 14 days	8 years 9 months 14 days
Aggregate Intrinsic Value [Abstract]
Fair value of options, vested	$ 614,100	$ 1,100,000
Weighted Average Assumptions used in Black-Scholes Option Pricing Model [Abstract]
Expected dividend yield	0.00%	0.00%
Risk-free interest rate	4.16%	2.13%
Expected volatility	152.28%	132.48%
Expected life	6 years 2 months 8 days	6 years 1 month 24 days
Additional Disclosures [Abstract]
Weighted-average fair value of options granted (in dollars per share)	$ 6.09	$ 76.05
Total unrecognized compensation costs related to non-vested stock option awards	$ 1,100,000
Unrecognized compensation costs related to non-vested stock option awards, recognition life	3 years 3 days