Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 30,755	$ 31,068
Short-term investments	249	1,497
Restricted cash equivalents and short-term investments	1,000	1,000
Prepaid expenses and other current assets	216	169
Total current assets	32,220	33,734
Property and equipment, net	4	32
Other assets	29	27
Total assets	32,253	33,793
Current liabilities:
Accounts payable	407	234
Accrued expenses	263	346
Total current liabilities	670	580
Accrued lease obligations, non-current	494
Income tax liability	101	101
Other liabilities	45
Total liabilities	1,310	681
Commitments and contingencies
Stockholders’ equity:
Common stock	11	11
Paid-in capital	221,750	221,726
Treasury stock	(6,788)	(6,788)
Accumulated deficit	(184,030)	(181,837)
Total stockholders’ equity	30,943	33,112
Total liabilities and stockholders’ equity	$ 32,253	$ 33,793