Condensed Consolidated Balance Sheets (Unaudited) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Cash and cash equivalents	$ 33,102,000	$ 70,326,000
Short-term investments	491,000	1,225,000
Restricted short-term investments	1,000,000	0
Prepaid expenses and other current assets	300,000	1,374,000
Total current assets	34,893,000	72,925,000
Property and equipment, net	44,000	42,000
Other assets	27,000	1,027,000
Total assets	34,964,000	73,994,000
Accounts payable	426,000	3,385,000
Accrued expenses and other current liabilities	247,000	541,000
Income tax payable		644,000
Total current liabilities	673,000	4,570,000
Income tax liability	101,000	101,000
Total liabilities	774,000	4,671,000
Commitments and contingencies
Stockholders’ equity:
Common stock	11,000	10,000
Paid-in capital	221,726,000	216,401,000
Treasury stock	(6,788,000)	(6,589,000)
Accumulated deficit	(180,759,000)	(140,499,000)
Total stockholders’ equity	34,190,000	69,323,000
Total liabilities and stockholders’ equity	$ 34,964,000	$ 73,994,000