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v3.20.2

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2020 | Jun. 30, 2019
Operating activities |  |
Net loss | $ (64,174) | $ (82,385)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Depreciation and amortization | 2,063 | 3,196
Amortization of right-of-use assets | 1,261 | 2,046
Gain on disposal of property and equipment and from lease termination | (76) |
Accretion of discounts on marketable securities | (78) | (875)
Change in fair value of warrant liability | 17,045 |
Stock compensation expense | 5,866 | 15,519
Cost of sales - amortization of intangible assets | 2,500 | 4,570
Non-cash interest expense | 1,726 | 2,135
Tenant improvements provided by the landlord | 908 | 3,228
Changes in operating assets and liabilities: |  |
Accounts and other receivables, net | 7,983 | (3,878)
Inventories, net | (13,060) | (17,607)
Prepaid expenses and other current assets | (2,083) | (643)
Other assets | 163 | 3,177
Accounts payable | (3,993) | 2,817
Lease liabilities | (1,383) | (761)
Accrued liabilities and other liabilities | (3,355) | (3,574)
Net cash used in operating activities | (48,687) | (76,263)
Investing activities |  |
Acquisition of technology licenses | (7,000) | (7,000)
Purchases of marketable securities | (103,182) | (108,341)
Proceeds from maturities and redemptions of marketable securities | 74,400 | 99,310
Purchases of property and equipment, net | (3,038) | (11,383)
Net cash used in investing activities | (38,820) | (27,414)
Financing activities |  |
Proceeds from long-term debt, net |  | 74,250
Proceeds from issuance of common stock, net | 107,697 | 13,949
Proceeds from exercise of stock options and restricted stock awards, net | 13 | 1
Proceeds from Employee Stock Purchase Plan | 311 | 407
Net cash provided by financing activities | 108,021 | 88,607
Effect of exchange rate changes on cash, cash equivalents and restricted cash | 88 | (44)
Net increase (decrease) in cash, cash equivalents and restricted cash | 20,602 | (15,114)
Cash, cash equivalents and restricted cash at beginning of period | 40,100 | 49,967
Cash, cash equivalents and restricted cash at end of period | 60,702 | 34,853
Supplemental disclosure of cash flow information |  |
Cash paid during the period for interest | 7,757 | 5,300
Tenant improvements provided by the landlord | 908 | 3,228
Non-cash investing and financing activities: |  |
Purchases of property and equipment, not yet paid | $ 124 | 6,920
Right-of-use assets obtained in exchange for operating lease liabilities |  | $ 34,807

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