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v3.8.0.1

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Operating activities |  |
Net loss | $ (38,958) | $ (25,287)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Depreciation and amortization | 823 | 789
Gain on disposal of property and equipment |  | (21)
Accretion of discounts on marketable securities | (176) | (10)
Stock compensation expense | 4,799 | 3,821
Cost of sales - amortization of intangible assets | 2,417 |
Non-cash interest expense | 348 |
Changes in operating assets and liabilities: |  |
Accounts and other receivables | 91 | (123)
Inventories | (238) |
Prepaid expenses and other current assets | 394 | (39)
Other assets | 3 | (907)
Accounts payable | 349 | (2,110)
Accrued liabilities and other long term liabilities | 276 | (1,363)
Net cash used in operating activities | (29,872) | (25,250)
Investing activities |  |
Acquisition of technology licenses | (9,500) |
Purchases of marketable securities | (141,103) | (44,652)
Proceeds from maturities of marketable securities | 91,815 | 37,875
Purchases of property and equipment, net | (897) | (234)
Net cash used in investing activities | (59,685) | (7,011)
Financing activities |  |
Proceeds from long-term debt, net | 99,000 |
Proceeds from issuance of common stock, net |  | 29,535
Tax withholding from exercise of stock options and restricted stock awards, net | (426) | (303)
Proceeds from Employee Stock Purchase Plan | 255 | 155
Net cash provided by financing activities | 98,829 | 29,387
Effect of exchange rate changes on cash, cash equivalents and restricted cash | 217 | 60
Net increase (decrease) in cash, cash equivalents and restricted cash | 9,489 | (2,814)
Cash, cash equivalents and restricted cash at beginning of period | 27,213 | 24,891
Cash, cash equivalents and restricted cash at end of period | 36,702 | 22,077
Supplemental disclosure of cash flow information |  |
Cash paid during the period for interest | 813 |
Release of accrual for litigation settlement and insurance recovery (Note 6) |  | $ 4,050
Non-cash investing and financing activities: |  |
Disposal of fully depreciated property and equipment | 37 |
Non-cash acquisition of technology license | $ 12,773 |

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