Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 60,048	$ 17,974
Prepaid expenses and other current assets	355	266
Total current assets	60,403	18,240
Property and equipment, net	1,228	1,075
Other long-term assets	130	130
Total assets	61,761	19,445
Current liabilities:
Accounts payable	1,758	1,010
Accrued expenses	1,033	1,498
Accrued disposition costs	1,088	1,082
Convertible notes payable to related parties, net of discount	365	103
Total current liabilities	4,244	3,693
Stockholders' equity:
Common stock	3,024	2,002
Additional paid-in capital	230,343	173,989
Accumulated deficit	(175,850)	(160,239)
Total stockholders' equity	57,517	15,752
Total liabilities and stockholders' equity	$ 61,761	$ 19,445