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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Operating activities    
Net loss $ (170,849) $ (165,338)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 4,676 3,195
Amortization and accretion income, net (2,599) (887)
Share-based compensation 36,538 39,599
Reversal of inventory purchase commitment liability   (2,250)
Amortization of right-of-use assets 3,029  
Undistributed earnings from investment in TRC, LLC (11,239) (2,803)
Other 148 (68)
Changes in operating assets and liabilities:    
Accounts receivable 534 (771)
Receivables from collaborative arrangements 5,458 3,202
Other prepaid and current assets (681) (493)
Inventories   (552)
Tax receivable (3,700) 5,092
Other assets 3 (115)
Accounts payable (543) (1,665)
Accrued personnel-related expenses, accrued clinical and development expenses, and other accrued liabilities (9,846) (14,324)
Accrued interest payable 4,482  
Deferred rent   3,370
Deferred revenue (21,661) 79,266
Long-term portion of lease liabilities (2,307)  
Other long-term liabilities (5,288) (5,147)
Net cash used in operating activities (173,845) (60,689)
Investing activities    
Purchases of property and equipment (1,873) (5,740)
Purchases of marketable securities (366,412) (166,412)
Maturities of marketable securities 266,168 249,450
Proceeds from the sale of VIBATIV business, net 5,000  
Proceeds from the sale of fixed assets 5 17
Net cash (used in) provided by investing activities (97,112) 77,315
Financing activities    
Proceeds from ESPP purchases 2,605 2,742
Proceeds from option exercises 2,973 1,306
Repurchase of shares to satisfy tax withholding (2,743) (8,452)
Net cash provided by (used in) financing activities 2,835 (4,404)
Net (decrease) increase in cash, cash equivalents, and restricted cash (268,122) 12,222
Cash, cash equivalents, and restricted cash at beginning of period 378,854 89,813
Cash, cash equivalents, and restricted cash at end of period 110,732 102,035
Supplemental disclosure of cash flow information    
Cash paid for interest 17,097 3,738
Cash paid (received) for income taxes, net 22 $ (5,027)
Right-of-use assets obtained in exchange for lease obligations (1) $ 49,847