Condensed Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 5,885	$ 8,629
Restricted cash	37	37
Prepaids	156	43
Total current assets	6,078	8,709
Equipment and furnishings, net	51	38
Total assets	6,129	8,747
Current liabilities:
Accounts payable	562	834
Accrued expenses	262	187
Accrued payroll and related expenses	82	73
Total current liabilities	906	1,094
Commitments
Stockholders’ equity:
Common stock, $ 0.0001 par value; 12,000,000,000 shares authorized, 7,257,033 and 4,404,407 shares issued and outstanding at March 31, 2014 and December 31, 2013, respectively	4	4
Additional paid-in capital	467,189	462,684
Accumulated deficit	(470,429)	(465,301)
Total stockholders’ equity	5,223	7,653
Total liabilities and stockholders' equity	6,129	8,747
Series C-1 Convertible Preferred Stock
Stockholders’ equity:
Convertible preferred stock, value	5,393	7,016
Series F Convertible Preferred Stock
Stockholders’ equity:
Convertible preferred stock, value	$ 3,066	$ 3,250