Condensed Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 3,888	$ 8,629
Restricted cash	37	37
Prepaid expenses and other current assets	148	43
Total current assets	4,073	8,709
Equipment and furnishings, net	89	38
Total assets	4,162	8,747
Current liabilities:
Accounts payable	917	834
Accrued expenses	58	187
Accrued payroll and related expenses	94	73
Total current liabilities	1,069	1,094
Shareholders’ equity:
Common stock, $ 0.0001 par value; 12,000,000,000 shares authorized, 9,838,298 and 4,404,407 shares issued and outstanding at June 30, 2014 and December 31, 2013, respectively	4	4
Additional paid-in capital	471,087	462,684
Accumulated deficit	(474,713)	(465,301)
Total shareholders’ equity	3,093	7,653
Total liabilities and shareholders' equity	4,162	8,747
Series C-1 Convertible Preferred Stock
Shareholders’ equity:
Convertible preferred stock, value	3,917	7,016
Series F Convertible Preferred Stock
Shareholders’ equity:
Convertible preferred stock, value	$ 2,798	$ 3,250