Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Cash flows from operating activities:
Net loss	$ (10,592)	$ (5,609)	$ (19,881)	$ (19,500)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	31	32	95	92
Stock-based compensation			1,299	1,505
License rights expense settled in stock			0	772
Change in fair value of warrant liability	1,728	(1)	(1,423)	(76)
Loss on issuance of warrant liabilities	847	0	847	0
Operating lease, net			106	105
Transaction costs allocated to warrant liabilities			993	0
Changes in operating assets and liabilities:
Prepaid expenses and other current assets			522	(573)
Accounts payable			52	(87)
Accrued expenses and other current liabilities			(1,389)	(932)
Net cash used in operating activities			(18,779)	(18,694)
Cash flows from investing activities:
Purchase of fixed assets			(13)	(43)
Net cash used in investing activities			(13)	(43)
Cash flows from financing activities:
Payment of tax liability for vested restricted stock units			(26)	(25)
Proceeds from sale of common stock, pre-funded and common warrants, net of issuance costs			4,660	211
Net cash provided by financing activities			4,634	186
Effect of exchange rate changes on cash and cash equivalents			13	(15)
Net decrease in cash and cash equivalents			(14,145)	(18,566)
Cash and cash equivalents, - beginning of period			23,550	43,145
Cash and cash equivalents, - end of period	$ 9,405	$ 24,579	9,405	24,579
Non-cash investing and financing activities:
Transaction costs related to the sale of common stock, pre-funded and common warrants			156	0
Transaction costs included in accounts payable and accrued liabilities			$ 42	$ 0