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CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Current assets:    
Cash and cash equivalents $ 93,108 $ 32,335
Marketable securities 137,548 135,721
Restricted cash 34,964 297
Accounts receivable - billed 1,449 7,510
Accounts receivable - unbilled 871 3,100
Prepaid expenses and other current assets 19,317 9,195
Total current assets 287,257 188,158
Restricted cash 1,537 0
Property and equipment, net 32,342 19,737
Intangible assets, net 10,793 12,577
Goodwill 53,065 54,612
Other non-current assets 1,044 918
Total assets 386,038 276,002
Current liabilities:    
Accounts payable 11,889 12,908
Accrued expenses 26,734 19,397
Deferred revenue 34,469 0
Current portion of notes payable 395 603
Deferred rent 1,409 1,138
Other current liabilities 1,598 70
Total current liabilities 76,494 34,116
Deferred revenue 4,171 2,500
Non-current portion of notes payable 0 395
Deferred rent 9,534 7,734
Other non-current liabilities 3,170 1,639
Total liabilities 93,369 46,384
Commitments and contingencies 0 0
Stockholders’ equity:    
Preferred stock, $0.01 par value, 2,000,000 shares authorized; no shares issued and outstanding at December 31, 2015 and 2014 0 0
Common stock, $0.01 par value, 600,000,000 shares authorized at December 31, 2015 and 300,000,000 shares authorized at December 31, 2014; and 270,426,662 shares issued and 269,971,232 shares outstanding at December 31, 2015 and 239,287,294 shares issued and 238,831,864 shares outstanding at December 31, 2014 2,704 2,393
Additional paid-in capital 951,569 729,373
Accumulated deficit (650,030) (493,093)
Treasury stock, 455,430 shares, cost basis at both December 31, 2015 and 2014 (2,450) (2,450)
Accumulated other comprehensive loss (9,124) (6,605)
Total stockholders’ equity 292,669 229,618
Total liabilities and stockholders’ equity $ 386,038 $ 276,002