Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets
Cash	$ 40	$ 76
Prepaid expenses	130	120
Total current assets	170	196
Total assets	170	196
Current liabilities
Accounts payable	2,287	2,309
Due to related parties	76	46
Accrued expenses	3,467	3,110
Accrued dividends	5,841	5,477
Term loan	5,677	5,677
Convertible notes payable, net	1,151	986
Derivative liability	7,169	7,697
Total current liabilities	25,668	25,302
Total liabilities	25,668	25,302
Commitments and contingencies (Note 9)
Stockholders’ deficit
Preferred stock
Common stock, $0.006 par value; 180,000,000 shares authorized, 17,493,237 and 16,998,836 shares issued and outstanding as of March 31, 2022 and December 31, 2021, respectively	105	102
Additional paid-in capital	27,852	27,809
Accumulated deficit	(53,455)	(53,017)
Total stockholders’ deficit	(25,498)	(25,106)
Total liabilities and stockholders’ deficit	170	196
Series C Convertible Preferred Stock [Member]
Stockholders’ deficit
Preferred stock
Series D Convertiable Preferred Stock [Member]
Stockholders’ deficit
Preferred stock
Series E Convertiable Preferred Stock [Member]
Stockholders’ deficit
Preferred stock
Series F Convertiable Preferred Stock [Member]
Stockholders’ deficit
Preferred stock
Series G Convertiable Preferred Stock [Member]
Stockholders’ deficit
Preferred stock