Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 11,059	$ 6,397
Prepaid expenses and other current assets	89	104
Total current assets	11,148	6,501
Property and equipment, net	6	6
Restricted cash and other long-term assets	6	69
Intangible assets, net	33	36
Total assets	11,193	6,612
Current liabilities:
Accounts payable	256	384
Accrued expenses	1,186	1,551
Accrued dividends payable		80
Deferred income		200
Total current liabilities	1,442	2,215
Total liabilities	1,442	2,215
Commitments and contingencies (Note 9)
Stockholders' equity (deficit):
Undesignated stock, $0.01 par value; 20,000,000 shares authorized, 8,001,000 designated at September 30, 2012 and December 31, 2011
Series A 12% convertible preferred stock; 5,000,000 shares authorized, 1,562,500 issued and outstanding at September 30, 2012 and December 31, 2011	632	632
Common stock, $0.001 par value; 50,000,000 shares authorized at September 30, 2012 and December 31, 2011, 15,966,437 and 12,919,538 issued and outstanding at September 30, 2012 and December 31, 2011, respectively	16	13
Additional paid-in capital	79,719	66,367
Deficit accumulated during the development stage	(77,310)	(69,137)
Total stockholders' equity (deficit)	3,057	(2,125)
Total liabilities, redeemable convertible preferred stock and stockholders' equity (deficit)	11,193	6,612
Series B-1 12% redeemable convertible preferred stock
Current liabilities:
Convertible preferred stock, value	1,694	1,681
Series B-2 12% redeemable convertible preferred stock
Current liabilities:
Convertible preferred stock, value	2,846	2,687
Series C super dividend convertible preferred stock
Current liabilities:
Convertible preferred stock, value	$ 2,154	$ 2,154