Condensed Consolidated Balance Sheets (Unaudited) - USD ($)	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 3,295,000	$ 5,439,000
Marketable investments	7,647,000	7,631,000
Funds receivable from New Jersey net operating loss and Other Receivables		1,184,000
Prepaid expenses and other current assets	364,000	302,000
Total current assets	11,306,000	14,556,000
Property and equipment, net	118,000	127,000
Right of use asset, net	763,000	697,000
Patent and trademark rights, net	2,314,000	2,313,000
Other assets	1,688,000	1,688,000
Total assets	16,189,000	19,381,000
Current liabilities:
Accounts payable	6,567,000	6,443,000
Accrued expenses	1,446,000	1,986,000
Current portion of operating lease liability	240,000	223,000
Current portion of note payable, net	1,623,000
Total current liabilities	9,876,000	8,652,000
Long-term liabilities:
Operating lease liability	537,000	495,000
Note payable, net	950,000
Total liabilities	11,363,000	9,147,000
Commitments and contingencies (Notes 9, 10 and 14)
Stockholders’ equity:
Common Stock, $0.001 par value, authorized shares - 350,000,000; issued and outstanding shares 50,251,933 and 49,102,484 as of March 31, 2024 and December 31, 2023, respectively	50,000	49,000
Additional paid-in capital	419,412,000	419,004,000
Accumulated deficit	(415,325,000)	(409,508,000)
Total stockholders’ equity	4,826,000	10,234,000
Total liabilities and stockholders’ equity	16,189,000	19,381,000
Series A Junior Participating Preferred Stock [Member]
Stockholders’ equity:
Preferred Stock, Value
Series B Convertible Preferred Stock [Member]
Stockholders’ equity:
Preferred Stock, Value	$ 689,000	$ 689,000