Stock Based Compensation - Narrative (Details)				12 Months Ended
	May 28, 2023 shares	Apr. 18, 2023 USD ($) shares	Jan. 03, 2023	Dec. 31, 2023 USD ($) $ / shares shares	Dec. 31, 2022 USD ($) $ / shares shares	Apr. 17, 2023 $ / shares	Dec. 31, 2021 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stockholders' equity note, stock split, conversion ratio			0.06667
Number of options granted (in shares) | shares				0	0
Exercisable number of options, vested (in shares) | shares				3,336	3,332
Vested stock options expired (in shares) | shares				6,668	501
Forfeited (in shares) | shares					10,000
Number of stock options outstanding (in shares) | shares				10,000	16,668		27,169
Weighted average exercise price, outstanding and exercisable (in dollars per share) | $ / shares				$ 48.75	$ 29.25		$ 113.63
Weighted average remaining contractual term				7 years 6 months
Intrinsic value of exercisable options				$ 0	$ 0
Stock option compensation expense, forfeiture					85,000
Unrecognized stock-based compensation expense for stock options				61,000
Outstanding stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option compensation expense					61,000
Expense gross					(146,000)
Stock option compensation expense, forfeiture					$ 85,000
Period of recognition					6 months
Outstanding stock options | General and Administrative Expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option compensation expense				124,000	$ 125,000
Outstanding stock options | Research and Development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option compensation expense					(64,000)
Unvested restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option compensation expense				$ 0	0
Unvested restricted shares outstanding (in shares) | shares				0
Unrecognized stock-based compensation expense for other than options				$ 0
Unvested restricted stock awards | Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested, restricted shares (in shares) | shares	42
Vesting period	10 years
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option compensation expense				$ 380,000	0
Unvested restricted shares outstanding (in shares) | shares				0
Unrecognized stock-based compensation expense for other than options				$ 0
Granted, restricted shares (in shares) | shares		177,564
RSUs | Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested, restricted shares (in shares) | shares	1,929
2019 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant (in shares) | shares				3
Stock option compensation expense				$ 504,000	61,000
Share price (in dollars per share) | $ / shares						$ 2.14
2019 Equity Incentive Plan | Research and Development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option compensation expense				0	(64,000)
2019 Equity Incentive Plan | Outstanding stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option compensation expense				124,000	61,000
2019 Equity Incentive Plan | RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option compensation expense		$ 380,000		$ 380,000	$ 0