Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (3,587)	$ (3,569)
Adjustments to reconcile net loss to net cash used in operating activities:
Gain on disposal of discontinued operations	0	(15,752)
Gain from settlement of account payable	(363)	0
Impairment loss	0	3,304
Share-based compensation expense	503	964
Changes in operating assets and liabilities:
Account receivable	(44)	96
Prepaid expenses	(179)	79
Other current assets	0	140
Operating lease assets	0	107
Other assets	0	213
Accounts payable	(531)	(2,157)
Accrued research and development costs	(18)	(1,912)
Accrued expenses and other current liabilities	(474)	(1,217)
Net cash used in operating activities	(4,693)	(19,704)
CASH FLOWS FROM INVESTING ACTIVITIES:
Net proceeds from disposal of discontinued operations	0	10,402
Net cash provided by investing activities	0	10,402
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from stock purchase agreement	0	5,000
Proceeds from exercises of stock options and ESPP	0	24
Net cash provided by financing activities	0	5,024
Effect of exchange rate changes on cash and cash equivalents	(6)	4
Net decrease in cash and cash equivalents	(4,699)	(4,274)
Cash and cash equivalents, beginning of period	7,571	13,382
Cash and cash equivalents, end of period	2,872	9,108
Supplemental Cash Flow Information [Abstract]
Non-cash gain on disposal of discontinued operations	$ 0	$ 5,350