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
6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Operating activities    
Net loss $ (32,105) $ (47,694)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 814 1,278
Stock compensation expense 3,963 4,496
Changes in assets and liabilities:    
Accounts receivable 5,400 5,750
Prepaid and other current assets 398 840
Other assets 68 67
Accounts payable (517) (2,007)
Accrued compensation 1,168 323
Accrued research and development 300 1,182
Other accrued liabilities 1 (15)
Deferred revenue 23,095  
Deferred rent and other long term liabilities (2,744) (592)
Net cash used in operating activities (159) (36,372)
Investing activities    
Purchases of short-term investments (82,798) (125,057)
Maturities of short-term investments 84,120 164,025
Capital expenditures (105) (253)
Net cash provided by investing activities 1,217 38,715
Financing activities    
Net proceeds from issuances of common stock 1,029 685
Net cash provided by financing activities 1,029 685
Net increase in cash and cash equivalents 2,087 3,028
Cash and cash equivalents at beginning of period 15,203 20,854
Cash and cash equivalents at end of period $ 17,290 $ 23,882