CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities:
Net loss	$ (8,931)	$ (8,749)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	46	56
Amortization of right of use asset	95	91
Stock-based compensation	294	372
Changes in operating assets and liabilities:
Prepaid expenses and other assets	(235)	(220)
Accounts payable	(606)	260
Accrued expenses	1,058	(1,141)
Lease liability	(100)	(93)
Net cash used in operating activities	(8,379)	(9,424)
Cash flows from investing activities:
Cash paid for purchase of property and equipment	(5)	(121)
Net cash used in investing activities	(5)	(121)
Cash flows from financing activities:
Net proceeds from the issuance of common stock and warrants	5,048	0
Cash in lieu of fractional shares for reverse stock split	(11)	0
Redemption of Series D preferred stock	(2)	0
Payment of taxes on net share settlements of restricted stock units	(25)	(28)
Net cash provided by (used in) financing activities	5,010	(28)
Net decrease in cash and restricted cash	(3,374)	(9,573)
Cash and restricted cash at the beginning of period	11,831	24,107
Cash and restricted cash at the end of period	$ 8,457	$ 14,534