Consolidated Balance Sheets (Unaudited) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 28,989,000	$ 32,093,000
Marketable securities	15,554,000	16,175,000
Funds receivable from New Jersey net operating loss	1,641,000	1,641,000
Prepaid expenses and other current assets	296,000	304,000
Assets held for sale	3,900,000
Total current assets	50,380,000	50,213,000
Property and equipment, net	137,000	4,047,000
Right of use asset, net	144,000	149,000
Patent and trademark rights, net	1,988,000	1,974,000
Other assets	1,506,000	1,316,000
Total assets	54,155,000	57,699,000
Current liabilities:
Accounts payable	378,000	198,000
Accrued expenses	328,000	438,000
Current portion of operating lease liability	60,000	37,000
Total current liabilities	766,000	673,000
Long-term liabilities:
Operating lease liability	84,000	112,000
Redeemable warrants	4,000	35,000
Commitments and contingencies (Notes 12, 13 and 14)
Stockholders’ equity:
Series B Convertible Preferred Stock, stated value $1,000 per share, 715 issued and outstanding	715,000	715,000
Common Stock, par value $0.001 per share, authorized 350,000,000 shares; 47,994,672 issued and outstanding	48,000	48,000
Additional paid-in capital	417,459,000	417,217,000
Accumulated deficit	(364,921,000)	(361,101,000)
Total stockholders’ equity	53,301,000	56,879,000
Total liabilities and stockholders’ equity	$ 54,155,000	$ 57,699,000