Condensed Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Current assets:    
Cash and cash equivalents $ 48,994 $ 10,659
Marketable securities 43,239 51,703
Prepaid and other current assets 2,837 3,275
Restricted cash 200 200
Total current assets 95,270 65,837
Property and equipment, net 198 314
Goodwill 2,962 2,962
Other assets   38
Total assets 98,430 69,151
Current liabilities:    
Accounts payable 1,012 987
Accrued liabilities 2,036 2,108
Other liabilities, current portion 70 244
Total current liabilities 3,118 3,339
Other liabilities, non-current portion   60
Total liabilities 3,118 3,399
Stockholders' equity    
Common stock 19 14
Additional paid-in capital 205,706 165,803
Accumulated deficit (110,411) (100,094)
Accumulated other comprehensive income (2) 29
Total stockholders' equity 95,312 65,752
Total liabilities and stockholders' equity $ 98,430 $ 69,151