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v3.20.2

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2020 | Sep. 30, 2019
Operating activities |  |
Net loss | $ (122,321) | $ (106,275)
Depreciation and amortization | 568 | 539
Stock-based compensation expense | 8,907 | 14,031
Amortization of debt issuance costs | 1,061 | 936
Amortization of premium/discount on investments | 106 | 1
Change in fair value of foreign currency derivative | 630 | 532
Receivables | 16,724 | 695
Inventory | (6,241) | (127)
Prepaid expenses and other assets | (1,448) | (1,018)
Accounts payable and accrued expenses | 6,725 | 9,975
Interest payable | 4,400 | 1,575
Deferred revenue | (1,688) | 0
Net cash used in operating activities | (92,577) | (79,136)
Acquisitions of property and equipment | (359) | (263)
Purchases of investments | (49,818) | (3,018)
Sales and maturities of investments | 21,907 | 64,954
Net cash (used in) provided by investing activities | (28,270) | 61,673
Sale of common stock, net | 92,848 | 0
Sale of pre-funded warrants | 14,817 | 0
Proceeds from senior credit facility | 0 | 19,477
Payment of senior credit facility | (5,000) | 0
Net proceeds from common stock issued under stock-based compensation plans | 1,164 | 1,161
Net cash provided by financing activities | 103,829 | 20,638
(Decrease) increase in cash, cash equivalents and restricted cash | (17,018) | 3,175
Cash, cash equivalents and restricted cash at beginning of period | 115,723 | 28,275
Cash, cash equivalents and restricted cash at end of period | $ 98,705 | $ 31,450

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- Definition Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
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