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v3.8.0.1

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2017 | Sep. 30, 2016
Operating activities |  |
Net loss | $ (67,733) | $ (90,703)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Depreciation and amortization | 2,456 | 1,574
Gain on disposal of property and equipment | (32) |
Accretion of discounts and amortization of premiums on marketable securities | (104) | 155
Reversal of deferred rent upon lease amendment | (209) |
Cash-settled portion of stock-based compensation expense |  | 602
Stock compensation expense | 10,844 | 10,030
Changes in operating assets and liabilities: |  |
Accounts and other receivables | 559 | (896)
Prepaid expenses and other current assets | (1,841) | 804
Other assets | (936) | (99)
Accounts payable | (1,499) | 704
Accrued liabilities and other long term liabilities | (1,274) | (286)
Deferred revenues |  | (2,654)
Net cash used in operating activities | (59,769) | (80,769)
Investing activities |  |
Purchases of marketable securities | (192,684) | (122,027)
Proceeds from maturities of marketable securities | 78,298 | 186,670
Purchases of property and equipment, net | (374) | (6,516)
Net cash (used in) provided by investing activities | (114,760) | 58,127
Financing activities |  |
Proceeds from issuance of common stock, net | 169,187 |
Proceeds from exercise of stock options and restricted stock awards, net | 285 | 131
Proceeds from Employee Stock Purchase Plan | 292 | 616
Net cash provided by financing activities | 169,764 | 747
Effect of exchange rate changes on cash and cash equivalents | 572 | 104
Net decrease in cash and cash equivalents | (4,193) | (21,791)
Cash and cash equivalents at beginning of period | 24,289 | 44,812
Cash and cash equivalents at end of period | 20,096 | 23,021
Supplemental disclosure of cash flow information |  |
Accrual for litigation settlement and insurance recovery (Note 4) |  | 4,050
Release of accrual for litigation settlement and insurance recovery (Note 4) | 4,050 |
Non-cash investing and financing activities: |  |
Disposal of fully depreciated property and equipment |  | 1,160
Net change in unrealized (loss) gain on marketable securities | (31) | $ 7
Common stock issuance costs - cash not paid as of period end | $ 110 |

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