Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities:
Net loss	$ (16,386,000)	$ (15,056,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation of property and equipment	30,000	29,000
Redeemable warrants valuation adjustment		(35,000)
Abandonment of patent and trademark rights	14,000
Amortization of patent, trademark rights	150,000	57,000
Non-cash lease expense	151,000	(717,000)
Gain on sale of income tax operating losses	(900,000)	(749,000)
Equity-based compensation	182,000	792,000
Loss on sale of investments	201,000	1,768,000
Change in assets and liabilities:
Other receivables	(9,000)
Funds receivable from New Jersey net operating loss	1,676,000	1,641,000
Prepaid expenses and other current assets and other non-current assets	192,000	(500,000)
Lease liability	(136,000)	717,000
Other assets		(73,000)
Accounts payable	2,411,000	758,000
Accrued expenses	915,000	1,329,000
Net cash used in operating activities	(11,509,000)	(10,039,000)
Cash flows from investing activities:
Proceeds from sale of marketable investments	924,000	9,082,000
Purchase of marketable investments	(1,155,000)	(1,661,000)
(Purchase of) Proceeds from sale of property and equipment	(10,000)	300,000
Purchase of patent and trademark rights	(377,000)	(96,000)
Net cash (used in) provided by investing activities	(618,000)	7,625,000
Cash flows from financing activities:
Proceeds from sale of stock, net of issuance costs	338,000	80,000
Net cash provided by financing activities	338,000	80,000
Net decrease in cash and cash equivalents	(11,789,000)	(2,334,000)
Cash and cash equivalents at beginning of period	27,053,000	32,093,000
Cash and cash equivalents at end of period	15,264,000	29,759,000
Supplemental disclosures of non-cash investing and financing cash flow information:
Operating lease liability arising from obtaining right of use asset	49,000	717,000
Unrealized loss on marketable investments	(71,000)	(1,170,000)
Conversion of Series B preferred	$ 6,000	$ 2,000