Condensed Consolidated Statement of Changes in Convertible Preferred Stock and Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Series X Non-Voting Convertible Preferred Stock [Member]	Common Stock [Member]	Common Stock [Member] Series X Non-Voting Convertible Preferred Stock [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] Series X Non-Voting Convertible Preferred Stock [Member]	Accumulated Other Comprehensive Loss [Member]	Accumulated Deficit [Member]
Beginning balance, shares at Dec. 31, 2022			4,541,167
Beginning balance at Dec. 31, 2022	$ 18,623		$ 91		$ 291,365		$ (48)	$ (272,785)
Stock-based compensation expense	391				391
Unrealized gain on investments	38						38
Net loss	(4,779)							(4,779)
Ending balance, shares at Mar. 31, 2023			4,541,167
Ending balance at Mar. 31, 2023	14,273		$ 91		291,756		(10)	(277,564)
Beginning balance, shares at Dec. 31, 2022			4,541,167
Beginning balance at Dec. 31, 2022	$ 18,623		$ 91		291,365		(48)	(272,785)
Exercises of stock options, shares	0
Unrealized gain on investments	$ 48
Net loss	(8,393)
Ending balance, shares at Sep. 30, 2023			4,541,167
Ending balance at Sep. 30, 2023	11,198		$ 91		292,285			(281,178)
Beginning balance, shares at Mar. 31, 2023			4,541,167
Beginning balance at Mar. 31, 2023	14,273		$ 91		291,756		(10)	(277,564)
Stock-based compensation expense	300				300
Unrealized gain on investments	8						8
Net loss	(1,787)							(1,787)
Ending balance, shares at Jun. 30, 2023			4,541,167
Ending balance at Jun. 30, 2023	12,794		$ 91		292,056		(2)	(279,351)
Stock-based compensation expense	229				229
Unrealized gain on investments	2						2
Net loss	(1,827)							(1,827)
Ending balance, shares at Sep. 30, 2023			4,541,167
Ending balance at Sep. 30, 2023	$ 11,198		$ 91		292,285			(281,178)
Beginning balance, shares at Dec. 31, 2023	4,885,512		4,885,512
Beginning balance at Dec. 31, 2023	$ 98,297	$ 91,410	$ 91		295,376		(63)	(288,517)
Beginning balance, shares at Dec. 31, 2023		24,610
Issuance of common stock in connection with conversion of Series X non-voting convertible preferred stock, value		$ (44,826)
Issuance of common stock in connection with conversion of Series X non-voting convertible preferred stock, shares		(11,957)
Issuance of common stock				$ 12		$ 44,814
Issuance of common stock, shares				11,957,000
Stock-based compensation expense	150				150
Net loss	(7,113)							(7,113)
Ending balance, shares at Mar. 31, 2024			16,842,512
Ending balance at Mar. 31, 2024	$ 91,334	$ 46,584	$ 103		340,340		(63)	(295,630)
Ending balance, shares at Mar. 31, 2024		12,653
Beginning balance, shares at Dec. 31, 2023	4,885,512		4,885,512
Beginning balance at Dec. 31, 2023	$ 98,297	$ 91,410	$ 91		295,376		(63)	(288,517)
Beginning balance, shares at Dec. 31, 2023		24,610
Exercises of stock options, shares	128,924
Unrealized gain on investments	$ 37
Net loss	$ (21,902)
Ending balance, shares at Sep. 30, 2024	21,665,941		21,665,941
Ending balance at Sep. 30, 2024	$ 95,232	$ 45,005	$ 108		360,564		(26)	(310,419)
Ending balance, shares at Sep. 30, 2024		12,232
Beginning balance, shares at Mar. 31, 2024			16,842,512
Beginning balance at Mar. 31, 2024	91,334	$ 46,584	$ 103		340,340		(63)	(295,630)
Beginning balance, shares at Mar. 31, 2024		12,653
Issuance of common stock in connection with conversion of Series X non-voting convertible preferred stock, value		$ (1,579)
Issuance of common stock in connection with conversion of Series X non-voting convertible preferred stock, shares		(421)
Issuance of common stock	10,937	$ (1)	$ 4		10,933	$ 1,578
Issuance of common stock, shares			4,273,505	421,000
Issuance of warrants	7,225				7,225
Stock-based compensation expense	326				326
Exercises of stock options	101				101
Exercises of stock options, shares			88,068
Unrealized gain on investments	41						41
Net loss	(8,942)							(8,942)
Ending balance, shares at Jun. 30, 2024			21,625,085
Ending balance at Jun. 30, 2024	101,021	$ 45,005	$ 107		360,503		(22)	(304,572)
Ending balance, shares at Jun. 30, 2024		12,232
Stock-based compensation expense	508				508
Issuance cost	(488)				(488)
Exercises of stock options	42		$ 1		41
Exercises of stock options, shares			40,856
Unrealized gain on investments	(4)						(4)
Net loss	$ (5,847)							(5,847)
Ending balance, shares at Sep. 30, 2024	21,665,941		21,665,941
Ending balance at Sep. 30, 2024	$ 95,232	$ 45,005	$ 108		$ 360,564		$ (26)	$ (310,419)
Ending balance, shares at Sep. 30, 2024		12,232