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v3.20.2

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2020 | Sep. 30, 2019
Operating activities |  |
Net loss | $ (34,994) | $ (52,105)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Depreciation and amortization | 2,988 | 3,484
Stock-based compensation expense | 10,358 | 8,292
Amortization of developed technology | 8,929 | 8,400
Amortization of debt discounts, premiums and issuance costs | 415 | 2,130
Lease amortization | 1,863 | (371)
Loss on extinguishment of debt | 0 | 9,000
Provision for excess and obsolete inventory | 680 | 1,356
Loss on disposal of property and equipment | 191 | 52
Other non-cash items | 13 | 195
Changes in assets and liabilities: |  |
Accounts receivable, net | 967 | 3,195
Inventories | (6,773) | (3,672)
Prepaid expenses and other assets | (2,395) | (1,338)
Accounts payable | 4,996 | 605
Deferred revenue | 1,258 | 1,592
Other liabilities | (180) | (10,506)
Net cash used in operating activities | (11,684) | (29,691)
Investing activities |  |
Acquisition, net of cash acquired | (5,154) | 0
Purchases of investments | 0 | (52,719)
Proceeds from RADx grant | 11,151 | 0
Proceeds from sale of investments | 5,010 | 0
Proceeds from maturities of investments | 31,800 | 16,000
Purchases of property and equipment | (2,010) | (2,031)
Net cash provided by (used in) investing activities | 40,797 | (38,750)
Financing activities |  |
Proceeds from issuance of common stock from at-the-market offering, net of commissions | 20,226 | 0
Payment of debt and equity issuance costs | (509) | (128)
Proceeds from exercise of stock options | 450 | 1,049
Proceeds from stock issuance from ESPP | 645 | 641
Payments for taxes related to net share settlement of equity awards and other | (387) | (556)
Net cash provided by financing activities | 20,425 | 1,006
Effect of foreign exchange rate fluctuations on cash and cash equivalents | 86 | (5)
Net increase (decrease) in cash, cash equivalents and restricted cash | 49,624 | (67,440)
Cash, cash equivalents and restricted cash at beginning of period | 23,736 | 95,401
Cash, cash equivalents and restricted cash at end of period | 73,360 | 27,961
Supplemental disclosures of cash flow information |  |
Cash paid for interest | 86 | 3,513
Cash paid for income taxes, net of refunds | 386 | 128
Asset retirement obligations | $ 319 | $ 311

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