CONSOLIDATED BALANCE SHEETS - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Current Assets:
Cash and cash equivalents	$ 30,620,000	$ 30,908,000
Restricted cash	54,000	67,000
Investment in marketable securities (Note 6)	62,633,000	0
Amount due from sale of MST Franchise	0	5,000,000
Prepaid and other current assets	2,656,000	2,300,000
Total Current Assets	95,963,000	38,275,000
Non-current Assets:
Operating lease right of use assets (Note 9)	207,000	0
Non-current prepaid expenses and other assets	1,515,000	2,483,000
Total Non-current Assets	1,722,000	2,483,000
Total Assets	97,685,000	40,758,000
Current Liabilities:
Trade payables	1,659,000	2,386,000
Accrued expenses (Note 8)	4,119,000	4,381,000
Employee-related obligations	1,645,000	2,372,000
Liability for employee severance benefits	0	206,000
Operating lease liabilities (Note 9)	115,000	0
Total Current Liabilities	7,538,000	9,345,000
Long-term Liabilities:
Non-current operating lease liabilities (Note 9)	99,000	0
Other liabilities	1,313,000	0
Total Long-term Liabilities	1,412,000	0
Total Liabilities	8,950,000	9,345,000
Commitments and Contingencies (Note 11)
Mezzanine Equity:
Convertible Preferred Stock: $0.0001 par value; 20,000,000 shares authorized at December 31, 2023 and December 31, 2022; Series A Preferred Stock: 0 and 3,000 shares issued and outstanding at December 31, 2023 and December 31, 2022, respectively (Note 12)	0	211,000
Shareholders' Equity:
Preferred stock: $0.0001 par value; 20,000,000 shares authorized at December 31, 2023 and December 31, 2022, respectively; no shares issued and outstanding at December 31, 2023 and December 31, 2022, respectively	0	0
Common stock: $0.0001 par value; 150,000,000 shares authorized at December 31, 2023 and December 31, 2022; 14,098,888 and 3,229,704 shares issued and outstanding at December 31, 2023 and December 31, 2022, respectively	1,000	0
Additional paid-in capital	780,044,000	693,937,000
Accumulated other comprehensive income	26,000	0
Accumulated deficit	(691,336,000)	(662,735,000)
Total Shareholders' Equity	88,735,000	31,202,000
Total Liabilities, Mezzanine Equity and Shareholders’ Equity	$ 97,685,000	$ 40,758,000