Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 8,629	$ 3,405
Restricted cash	37	0
Prepaids and other current assets	43	25
Total current assets	8,709	3,430
Equipment and furnishings, net	38	0
Total assets	8,747	3,430
Current liabilities:
Accounts payable	834	92
Accrued expenses	187	107
Accrued payroll and related expenses	73	17
Total current liabilities	1,094	216
Commitments
Stockholders’ equity:
Common stock, $0.0001 par value; 12,000,000,000 shares authorized, 4,404,407 and 285,347 shares issued and outstanding at December 31, 2013 and 2012, respectively	4	1
Additional paid-in capital	462,684	439,672
Accumulated deficit	(465,301)	(447,366)
Total stockholders’ equity	7,653	3,214
Total liabilities and stockholders' equity	8,747	3,430
Series C-1 Convertible Preferred Stock [Member]
Stockholders’ equity:
Convertible preferred stock, value	7,016	5,792
Series C-2 Convertible Preferred Stock [Member]
Stockholders’ equity:
Convertible preferred stock, value	0	500
Series D-1 Convertible Preferred Stock [Member]
Stockholders’ equity:
Convertible preferred stock, value	0	4,615
Series F Convertible Preferred Stock [Member]
Stockholders’ equity:
Convertible preferred stock, value	$ 3,250	$ 0