Condensed Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 10,700	$ 3,405
Restricted cash	37	0
Prepaids and other current assets	47	25
Total current assets	10,784	3,430
Equipment and furnishings, net	37	0
Total assets	10,821	3,430
Current liabilities:
Accounts payable	473	92
Accrued expenses	48	107
Accrued payroll and related expenses	56	17
Total current liabilities	577	216
Commitments
Stockholders’ equity:
Common stock, $ 0.0001 par value; 12,000,000,000 shares authorized, 214,600,860 and 14,267,383 shares issued and outstanding at September 30, 2013 and December 31, 2012, respectively	21	1
Additional paid-in capital	458,796	439,672
Accumulated deficit	(458,904)	(447,366)
Total stockholders’ equity	10,244	3,214
Total liabilities, convertible preferred stock and stockholders' deficit	10,821	3,430
Series C-1 Convertible Preferred Stock
Stockholders’ equity:
Convertible preferred stock, value	7,081	5,792
Series C-2 Convertible Preferred Stock
Stockholders’ equity:
Convertible preferred stock, value	0	500
Series D-1 Convertible Preferred Stock
Stockholders’ equity:
Convertible preferred stock, value	0	4,615
Series F Convertible Preferred Stock
Stockholders’ equity:
Convertible preferred stock, value	$ 3,250	$ 0