Nature of Business and Basis of Presentation, Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Potential shares of common stock that are not included in the calculation of diluted net loss per share [Abstract]
Potential shares of common stock that are not included in the calculation of diluted net loss per share (in shares)							4,185,115	40,756
Reported net loss with reported net loss per share [Abstract]
Net income (loss)	$ 2,358	$ (7,725)	$ (4,330)	$ (3,370)	$ (4,845)	$ (6,485)	$ (9,697)	$ (14,700)
Deemed dividend attributable to Series J Convertible Preferred Stock	0			0			541	0
Net income (loss) attributable to common shareholders	$ 2,358			$ (3,370)			$ (9,156)	$ (14,700)
Weighted average shares outstanding - basic (in shares)	1,351,939			53,265			647,079	41,128
Weighted average shares outstanding - diluted (in shares)	1,351,939			53,265			647,079	41,128
Basic loss per share (in dollars per share)	$ 1.74			$ (63.27)			$ (14.99)	$ (357.42)
Diluted loss per share (in dollars per share)	$ 1.74			$ (63.27)			$ (14.99)	$ (357.42)
Stock Options [Member]
Potential shares of common stock that are not included in the calculation of diluted net loss per share [Abstract]
Potential shares of common stock that are not included in the calculation of diluted net loss per share (in shares)							3,890	3,101
Warrants to Purchase Common Stock [Member]
Potential shares of common stock that are not included in the calculation of diluted net loss per share [Abstract]
Potential shares of common stock that are not included in the calculation of diluted net loss per share (in shares)							4,112,197	37,401
Series F Convertible Preferred Stock [Member]
Potential shares of common stock that are not included in the calculation of diluted net loss per share [Abstract]
Potential shares of common stock that are not included in the calculation of diluted net loss per share (in shares)							68,961	254
Series J Convertible Preferred Stock [Member]
Potential shares of common stock that are not included in the calculation of diluted net loss per share [Abstract]
Potential shares of common stock that are not included in the calculation of diluted net loss per share (in shares)							67	0