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v3.19.2

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2019 | Jun. 30, 2018
Operating activities |  |
Net loss | $ (82,385) | $ (78,402)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Depreciation and amortization | 3,196 | 1,658
Amortization of right-of-use assets | 2,046 |
Accretion of discounts on marketable securities | (875) | (681)
Stock compensation expense | 15,519 | 11,089
Cost of sales - amortization of intangible assets | 4,570 | 4,715
Non-cash interest expense | 2,135 | 1,139
Changes in operating assets and liabilities: |  |
Accounts and other receivables, net | (3,878) | (450)
Inventories, net | (17,607) | (4,800)
Prepaid expenses and other current assets | (643) | (186)
Other assets | 3,177 | (834)
Accounts payable | 2,817 | 1,623
Lease liabilities | (761) |
Accrued liabilities and other liabilities | (3,574) | 1,330
Net cash used in operating activities | (76,263) | (63,799)
Investing activities |  |
Acquisition of technology licenses | (7,000) | (9,500)
Purchases of marketable securities | (108,341) | (186,821)
Proceeds from maturities of marketable securities | 99,310 | 165,450
Purchases of property and equipment, net | (11,383) | (1,639)
Net cash used in investing activities | (27,414) | (32,510)
Financing activities |  |
Proceeds from long-term debt, net | 74,250 | 99,000
Proceeds from issuance of common stock, net | 13,949 |
Proceeds (tax withholding) from exercise of stock options and restricted stock awards, net | 1 | (549)
Proceeds from Employee Stock Purchase Plan | 407 | 255
Net cash provided by financing activities | 88,607 | 98,706
Effect of exchange rate changes on cash, cash equivalents and restricted cash | (44) | (260)
Net (decrease) increase in cash, cash equivalents and restricted cash | (15,114) | 2,137
Cash, cash equivalents and restricted cash at beginning of period | 49,967 | 27,213
Cash, cash equivalents and restricted cash at end of period | 34,853 | 29,350
Supplemental disclosure of cash flow information |  |
Cash paid during the period for interest | 5,300 | 2,713
Tenant improvements provided by the landlord | 3,228 |
Non-cash investing and financing activities: |  |
Disposal of fully depreciated property and equipment | 981 | 42
Non-cash acquisition of technology license |  | 12,773
Purchases of property and equipment, not yet paid | 6,920 | $ 327
Right-of-use assets obtained in exchange for operating lease liabilities | $ 34,807 |

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- Definition Amount of cash inflow from sale, maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3151-108585 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=118954083&loc=d3e26853-111562 + Details
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