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CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Current assets    
Cash and cash equivalents $ 3,970 $ 40,025
Short-term investments 26,343 9,413
Accounts receivable, net 326 969
Prepaid expenses and other current assets 1,775 1,596
Total current assets 32,414 52,003
Long-term investments 18,626 8,537
Property and equipment, net 924 1,382
Goodwill 23,134 23,134
Intangible assets, net 3,154 4,400
Other assets 177 181
Total assets 78,429 89,637
Current liabilities    
Accounts payable 623 336
Accrued expenses and other liabilities 2,278 2,779
Deferred revenue 851 920
Total current liabilities 3,752 4,035
Long-term liabilities 144 109
Commitments and contingencies (Note 4)      
Stockholders' equity    
Preferred stock, $0.01 par value; 20,000 shares authorized; none issued and outstanding      
Common stock, $0.01 par value; 120,000 shares authorized; 38,956 shares and 38,423 shares issued and outstanding at June 30, 2012 and December 31, 2011, respectively 390 384
Additional paid-in capital 153,311 150,507
Accumulated other comprehensive income (loss) (1) 1
Accumulated deficit (79,167) (65,399)
Total stockholders' equity 74,533 85,493
Total liabilities and stockholders' equity $ 78,429 $ 89,637