CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Income Statement [Abstract]
Total Revenues	$ 424	$ 477
Operating Expenses:
Research and development	16,307	18,385
General and administrative	13,375	16,387
Total Operating Expenses	29,682	34,772
Operating Loss	(29,258)	(34,295)
Other income, net	1,386	363
Loss from continuing operations before income taxes	(27,872)	(33,932)
Income tax expense	0	13
Loss from continuing operations	(27,872)	(33,945)
(Loss) income from discontinued operations, net of income taxes	(580)	10,735
Net Loss	$ (28,452)	$ (23,210)
Loss per share from continuing operations, basic (in dollars per share)	$ (2.72)	$ (10.65)
Loss per share from continuing operations, diluted (in dollars per share)	(2.72)	(10.65)
(Loss) income per share from discontinuing operations, basic (in dollars per share)	(0.06)	3.37
(Loss) income per share from discontinuing operations, diluted (in dollars per share)	(0.06)	3.37
Loss per share basic (in dollars per share)	(2.78)	(7.28)
Loss per share diluted (in dollars per share)	$ (2.78)	$ (7.28)
Weighted average shares outstanding - basic (in shares)	10,273	3,186
Weighted average shares outstanding - diluted (in shares)	10,273	3,186
Other comprehensive income:
Unrealized gain on marketable securities, net of tax of $0	$ 26	$ 0
Total other comprehensive income	26	0
Comprehensive loss	$ (28,426)	$ (23,210)