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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Cash flows from operating activities:    
Net loss $ (3,705,000) $ (5,817,000)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation of property and equipment 10,000 9,000
Abandonment and expiration of patents and trademark rights 335,000
Amortization of patent, trademark rights 48,000 49,000
Amortization of Debt Discount and Other Expenses 64,000 73,000
Non-cash lease expense 64,000 (67,000)
Equity-based compensation 60,000 80,000
Loss (gain) on sale of marketable investments (27,000) 92,000
Change in assets and liabilities:    
Funds receivable from New Jersey net operating loss 1,184,000
Other receivables (19,000)
Other assets 367,000
Prepaid expenses and other current assets and other non-current assets (119,000) (62,000)
Lease liability (62,000) 60,000
Accounts payable 561,000 124,000
Accrued expenses 62,000 (540,000)
Net cash used in operating activities (2,361,000) (4,815,000)
Cash flows from investing activities:    
Proceeds from sale of marketable investments 1,045,000 50,000
Purchase of marketable investments (91,000) (158,000)
(Purchase) abandonment of patent and trademark rights (56,000) (50,000)
Net cash provided by (used in) investing activities 898,000 (158,000)
Cash flows from financing activities:    
Proceeds from sale of stock, net of issuance costs 660,000 329,000
Proceeds from note payable, net of issuance costs 2,500,000
Net cash provided by financing activities 660,000 2,829,000
Net decrease in cash and cash equivalents (803,000) (2,144,000)
Cash and cash equivalents at beginning of period 1,701,000 5,439,000
Cash and cash equivalents at end of period 898,000 3,295,000
Supplemental disclosures of non-cash investing and financing cash flow information:    
Unrealized gain (loss) on marketable investments 96,000 (73,000)
Repayment of debt obligation with shares $ 421,000