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CONSOLIDATED BALANCE SHEETS (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Current assets    
Cash and cash equivalents $ 40,025 $ 14,340
Short-term investments 9,413 15,011
Accounts receivable, net 969 1,079
Unbilled contracts receivable 74 202
Prepaid expenses and other current assets 1,522 3,377
Total current assets 52,003 34,009
Long-term investments 8,537 8,193
Property and equipment, net 1,382 2,160
Goodwill 23,134 23,134
Intangible assets, net 4,400 6,238
Other assets 181 232
Total assets 89,637 73,966
Current liabilities    
Accounts payable 336 839
Accrued expenses and other liabilities 2,779 2,623
Accrued acquisition-related earn-out   1,500
Deferred revenue 920 1,801
Total current liabilities 4,035 6,763
Long-term liabilities 109 146
Commitments and contingencies (Note 12)      
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; 38,423 shares and 37,225 shares issued and outstanding at December 31, 2011 and 2010, respectively 384 372
Additional paid-in capital 150,507 143,336
Accumulated other comprehensive income 1 4
Accumulated deficit (65,399) (76,655)
Total stockholders' equity 85,493 67,057
Total liabilities and stockholders' equity $ 89,637 $ 73,966