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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Cash flows from operating activities:          
Net loss $ (4,909,000) $ (4,851,000) $ (8,570,000) $ (8,671,000)  
Adjustments to reconcile net loss to net cash used in operating activities:          
Depreciation of property and equipment     21,000 20,000  
Redeemable warrants valuation adjustment (3,000) (34,000)  
Amortization of patent, trademark rights     106,000 38,000 $ 218,000
Changes in ROU assets     48,000 (740,000)  
Gain from sale of income tax operating losses     (582,000) (422,000)  
Equity-based compensation     132,000 517,000  
(Loss) on sale of marketable securities     (109,000) 1,404,000  
Change in assets and liabilities:          
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     17,000 (69,000)  
Lease liability     (34,000) 740,000  
Other Assets     (39,000) (73,000)  
Accounts payable     1,774,000 514,000  
Accrued expenses     (278,000) 64,000  
Net cash used in operating activities     (5,838,000) (5,071,000)  
Cash flows from investing activities:          
Proceeds from sale of marketable securities     598,000 8,713,000  
Purchase of marketable securities     (712,000) (1,262,000)  
Proceeds from sale of property and equipment     35,000  
Purchase of patent and trademark rights     (203,000) (76,000)  
Net cash (used in) provided by investing activities     (282,000) 7,375,000  
Cash flows from financing activities:          
Proceeds from sale of stock, net of issuance costs     105,000 55,000  
Net cash provided by financing activities     105,000 55,000  
Net (decrease) increase in cash and cash equivalents     (6,015,000) 2,359,000  
Cash and cash equivalents at beginning of period     27,053,000 32,093,000 32,093,000
Cash and cash equivalents at end of period $ 21,038,000 $ 34,452,000 21,038,000 34,452,000 $ 27,053,000
Supplemental disclosures of non-cash investing and financing cash flow information:          
Operating lease-Right of Use Assets     (48,000) 761,000  
Unrealized gain (loss) on marketable securities     196,000 (225,000)  
Conversion of Series B preferred     $ 6,000 $ 2,000