v2.4.0.6
Condensed Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2011
Dec. 31, 2010
Current assets:    
Cash and cash equivalents $ 48,185 $ 44,321
Available-for-sale securities 152,912 203,706
Accounts receivable 110 19
Related party accounts receivable, net 2,517 2,876
Prepaid expenses and other assets 4,658 5,320
Restricted cash   2,833
Total current assets 208,382 259,075
Restricted cash 7,647 7,647
Property and equipment, net 33,484 34,369
Other assets 214 274
Total assets 249,727 301,365
Current liabilities:    
Accounts payable 6,507 4,302
Accrued research and development costs 5,429 8,140
Accrued expenses 6,648 8,938
Current portion of capital lease obligations 229 197
Current portion of deferred rent 3,282 2,799
Current portion of deferred revenue 48,555 40,050
Other current liabilities 194  
Total current liabilities 70,844 64,426
Capital lease obligations, net of current portion 540 393
Deferred rent, net of current portion 14,379 14,612
Deferred revenue, net of current portion 33,144 62,383
Other liabilities 703  
Commitments and contingencies (Note 8)      
Stockholders' equity:    
Preferred stock, $0.001 par value, 75,000,000 shares authorized, no shares issued and outstanding      
Additional paid-in capital 534,749 526,991
Accumulated deficit (404,785) (367,540)
Accumulated other comprehensive income 53 1
Total stockholders' equity 130,117 159,551
Total liabilities and stockholders' equity 249,727 301,365
Class A common stock
   
Stockholders' equity:    
Common stock 51 48
Class B common stock
   
Stockholders' equity:    
Common stock $ 49 $ 51