CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities:
Net loss	$ (10,826,000)	$ (11,480,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	56,000	71,000
Amortization of right of use asset	128,000	122,000
Impairment of property and equipment	126,000	0
Stock-based compensation	303,000	414,000
Changes in operating assets and liabilities:
Prepaid expenses and other assets	(196,000)	8,000
Accounts payable	(122,000)	496,000
Accrued expenses	(83,000)	(1,635,000)
Lease liability	(135,000)	(125,000)
Net cash used in operating activities	(10,749,000)	(12,129,000)
Cash flows from investing activities:
Cash paid for purchase of property and equipment	(5,000)	(121,000)
Net cash used in investing activities	(5,000)	(121,000)
Cash flows from financing activities:
Net proceeds from the issuance of common stock and warrants	7,452,000	0
Net proceeds from the issuance of preferred stock	0	2,000
Cash-in-lieu of fractional shares for reverse stock split	(11,000)	0
Redemption of Series D Preferred Stock	(2,000)	0
Payment of taxes on net share settlements of restricted stock units	(26,000)	(28,000)
Net cash provided by (used in) financing activities	7,413,000	(26,000)
Net decrease in cash and restricted cash	(3,341,000)	(12,276,000)
Cash and restricted cash at the beginning of period	11,831,000	24,107,000
Cash and restricted cash at the end of period	$ 8,490,000	$ 11,831,000