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v3.24.0.1

Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Operating activities |  |
Net loss | $ (74,656) | $ (190,098)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Loss on forward sale of Series B Preferred Stock | 0 | 60,081
Loss on bridge loans | 0 | 13,719
Stock-based compensation expense | 13,123 | 14,880
Amortization of developed technology | 11,200 | 11,528
Depreciation and amortization | 3,980 | 3,499
Provision for excess and obsolete inventory | 1,496 | 7,874
Impairment of InstruNor developed technology intangible | 0 | 3,526
Amortization of debt discounts, premiums and issuance costs | 770 | 830
Other non-cash items | (987) | 273
Changes in assets and liabilities: |  |
Accounts receivable, net | (2,991) | 1,063
Inventories, net | (4,914) | (8,470)
Prepaid expenses and other assets | 960 | 33
Accounts payable | 1,618 | (2,776)
Accrued compensation and related benefits | 3,018 | 4,113
Deferred revenue | 884 | (3,467)
Other liabilities | 3,212 | (5,978)
Net cash used in operating activities | (43,287) | (89,370)
Investing activities |  |
Purchases of short-term investments | (94,896) | (137,302)
Proceeds from sales and maturities of investments | 117,964 | 53,000
Purchases of property and equipment | (2,831) | (3,825)
Net cash provided by (used in) investing activities | 20,237 | (88,127)
Financing activities |  |
Proceeds from bridge loans | 0 | 25,000
Proceeds from issuance of Series B Preferred Stock | 0 | 225,000
Repayment of term loan and advances under revolving credit facility | (2,083) | (6,838)
Payment of debt and equity issuance costs | 0 | (12,547)
Repurchase of common stock | (5,414) | (563)
Proceeds from ESPP stock issuance and exercise of stock options | 827 | 917
Payments for taxes related to net share settlement of equity awards and other | (139) | (211)
Net cash provided by (used in) financing activities | (6,809) | 230,758
Effect of foreign exchange rate fluctuations on cash and cash equivalents | 34 | (404)
Net increase (decrease) in cash, cash equivalents and restricted cash | (29,825) | 52,857
Cash, cash equivalents and restricted cash at beginning of period | 82,324 | 29,467
Cash, cash equivalents and restricted cash at end of period | 52,499 | 82,324
Supplemental disclosures of cash flow information |  |
Cash paid for interest | 3,819 | 3,493
Cash paid for income taxes, net of refunds | 801 | 309
Non-cash right-of-use assets and lease liabilities | 629 | 651
Asset retirement obligations | $ 758 | $ 718

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