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Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Current assets:    
Cash and cash equivalents $ 7,599 $ 31,941
Marketable securities available-for-sale 117,531 82,020
Accounts receivable 1,005 9,527
Prepaid expenses and other current assets 2,052 1,130
Total current assets 128,187 124,618
Property and equipment, net 7,965 6,163
Goodwill 2,475 2,312
Restricted cash 652 647
Other assets 473 362
Total assets 139,752 134,102
Current liabilities:    
Accounts payable 2,166 2,040
Accrued liabilities 10,063 8,159
Deferred revenues 6,785 4,210
Note payable to Symphony Dynamo Holdings LLC ("Holdings")   12,810
Total current liabilities 19,014 27,219
Deferred revenues, noncurrent 5,283 6,386
Other long-term liabilities 629 617
Total liabilities 24,926 34,222
Commitments and contingencies (Note 10)      
Stockholders' equity:    
Preferred stock: $0.001 par value; 5,000 shares authorized and no shares issued and outstanding at December 31, 2012 and 2011      
Common stock: $0.001 par value; 250,000 shares authorized at December 31, 2012 and 2011, respectively; 182,792 and 154,626 shares issued and outstanding at December 31, 2012 and 2011, respectively 183 155
Additional paid-in capital 550,729 466,276
Accumulated other comprehensive loss:    
Unrealized gain (loss) on marketable securities available-for-sale 45 (3)
Cumulative translation adjustment (640) (1,006)
Total accumulated other comprehensive loss (595) (1,009)
Accumulated deficit (435,491) (365,542)
Total stockholders' equity 114,826 99,880
Total liabilities and stockholders' equity $ 139,752 $ 134,102