Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 3,405	$ 5,040
Prepaids and other current assets	25	60
Total current assets	3,430	5,100
Total assets	3,430	5,100
Current liabilities:
Accounts payable	92	8
Accrued expenses	107	240
Accrued payroll and related expenses	17	7
Derivative liabilities		15,270
Total current liabilities	216	15,525
Series C-12 redeemable convertible preferred stock, $0.0001 par value; 11,000 shares authorized, 5,043 shares issued and outstanding at December 31, 2011, (redemption value and liquidation preference in the aggregate of $5,116 at December 31, 2011, (See Notes 1 and 4)		5,133
Commitments
Stockholders' equity (deficit):
Common stock, $0.0001 par value; 12,000,000,000 shares authorized, 14,267,383 and 874,746 shares issued and outstanding at December 31, 2012 and 2011, respectively	1
Additional paid-in capital	439,672	424,071
Accumulated deficit	(447,366)	(439,629)
Total stockholders' equity (deficit)	3,214	(15,558)
Total liabilities, redeemable convertible preferred stock and stockholders' deficit	3,430	5,100
Series C-1 convertible preferred stock
Stockholders' equity (deficit):
Convertible preferred stock, value	5,792
Total stockholders' equity (deficit)	5,792
Series C-2 convertible preferred stock
Stockholders' equity (deficit):
Convertible preferred stock, value	500
Total stockholders' equity (deficit)	500
Series D-1 preferred
Stockholders' equity (deficit):
Convertible preferred stock, value	$ 4,615