Condensed Consolidated Balance Sheets (Unaudited) (USD $)	Jun. 30, 2013	Dec. 31, 2012
ASSETS
Cash and cash equivalents	$ 200,000	$ 172,000
Restricted cash	601,000	909,000
Prepaid expenses and other current assets	99,000	116,000
Total current assets	900,000	1,197,000
Property and equipment, net	36,000	56,000
Deferred financing costs	24,000	75,000
Total assets	960,000	1,328,000
Accounts payable	2,304,000	1,349,000
Accrued research contract costs	0	120,000
Other accrued liabilities	2,497,000	2,043,000
Related party loan	638,000	0
Notes and loans payable, net of discount	4,040,000	3,975,000
Deferred revenue	294,000	314,000
Total current liabilities	9,773,000	7,801,000
Deferred revenue, net of current portion	7,368,000	7,496,000
Total liabilities	17,141,000	15,297,000
Commitments and contingencies
Convertible preferred stock
Common stock, $.0001 par value; authorized 225,000,000 shares; issued 114,159,030 shares and 93,645,376 shares at June 30, 2013 and December 31, 2012, respectively	11,000	9,000
Additional paid-in capital	242,213,000	236,886,000
Warrants	14,411,000	19,152,000
Accumulated deficit	(271,595,000)	(268,811,000)
Accumulated other comprehensive loss	(1,146,000)	(1,130,000)
Treasury stock, at cost (4,167 shares)	(75,000)	(75,000)
Total stockholders’ deficit	(16,181,000)	(13,969,000)
Total liabilities and stockholders’ deficit	960,000	1,328,000
Series B Preferred Stock [Member]
ASSETS
Convertible preferred stock	$ 0	$ 0