CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
CONSOLIDATED STATEMENTS OF OPERATIONS [Abstract]
Revenue	$ 7	$ 48
Operating expense:
Licensing costs	0	(4)
Research and development	9,713	6,406
Selling, general and administrative expenses	21,739	15,722
Total operating expense	31,452	22,124
(Loss) from operations	(31,445)	(22,076)
Interest and other income, net	3,495	1,848
(Loss) before taxes	(27,950)	(20,228)
Income tax (provision) benefit	79	(16,032)
Net (loss)	$ (27,871)	$ (36,260)
Basic (loss) per share (in dollars per share)	$ (7.79)	$ (10.17)
Diluted (loss) per share (in dollars per share)	$ (7.79)	$ (10.17)
Weighted average shares outstanding basic (in shares)	3,579	3,565
Weighted average shares outstanding diluted (in shares)	3,579	3,565