Condensed Consolidated Balance Sheets - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 16,458,053	$ 10,003,375
Insurance claim receivable	1,075	325,105
Prepaid expenses and other current assets	87,523	1,094,675
Total current assets	16,546,651	11,423,155
Equipment and furnishings, net	29,927	39,758
Other assets	16,836	16,836
Operating lease right-of-use assets	443,617	580,478
Total assets	17,037,031	12,060,227
Current liabilities:
Accounts payable	1,167,945	1,402,054
Accrued expenses and other current liabilities	1,433,334	1,190,910
Current portion of operating lease liabilities	184,761	181,103
Total current liabilities	2,786,040	2,774,067
Operating lease liabilities, net of current portion	276,593	415,200
Total liabilities	3,062,633	3,189,267
Preferred Stock, Series C 10% Convertible, $1,000 par value, 8,240 shares issued and outstanding	4,022,700
Stockholders’ equity:
Preferred Stock, $0.01 par value, 833,333 shares authorized, including 50,000 shares of Series B Junior Participating Preferred Stock; no shares issued and outstanding
Common stock, $0.001 par value, 41,666,666 shares authorized; 38,780,038 shares issued and outstanding at September 30, 2021 and 36,480,038 shares issued and outstanding at December 31, 2020	38,780	36,480
Additional paid-in capital	484,790,650	479,561,860
Accumulated deficit	(474,877,732)	(470,727,380)
Total stockholders’ equity	9,951,698	8,870,960
Total liabilities and stockholders’ equity	$ 17,037,031	$ 12,060,227