Quarterly report pursuant to Section 13 or 15(d)

CONDENSED STATEMENTS OF CASH FLOWS

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CONDENSED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Operating activities    
Net loss $ (38,777) $ (68,636)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 1,101 1,852
Stock compensation expense 5,778 6,576
Gain on disposal of assets (57) (46)
Changes in assets and liabilities:    
Accounts receivable 5,587 5,750
Prepaid and other current assets (39) 1,079
Other assets 52 114
Accounts payable (924) (2,885)
Accrued compensation 1,529 787
Accrued research and development 1,206 1,438
Other accrued liabilities 571 134
Deferred revenue 18,261  
Deferred rent and other long term liabilities (3,904) (912)
Net cash used in operating activities (9,616) (54,749)
Investing activities    
Purchases of short-term investments (109,882) (171,659)
Maturities of short-term investments 142,097 217,891
Proceeds from disposal of assets 60  
Capital expenditures (412) (213)
Net cash provided by investing activities 31,863 46,019
Financing activities    
Net proceeds from issuances of common stock 1,127 690
Net cash provided by financing activities 1,127 690
Net increase (decrease) in cash and cash equivalents 23,374 (8,040)
Cash and cash equivalents at beginning of period 15,203 20,854
Cash and cash equivalents at end of period $ 38,577 $ 12,814