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v3.22.4

Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Cash flows from operating activities |  |
Net loss | $ (58,923) | $ (48,661)
Adjustments to reconcile net loss to net cash used in operating activities |  |
Stock-based compensation expense | 16,445 | 10,530
Write-off of fixed assets | 7 | 7
Allowance for doubtful accounts | 54 | 4
Inventory write-downs | 485 | 1,186
Depreciation and amortization expense | 1,513 | 867
Amortization of debt discount and debt issuance costs | 56 | 106
Amortization of premiums and discounts on marketable securities | (204) | 59
Non-cash lease expense | 2,498 | 2,360
Net changes in operating assets and liabilities: |  |
Accounts receivable | (2,190) | (2,432)
Inventory | (3,638) | (6,458)
Prepaid expenses and other current assets | 780 | (1,214)
Other assets | (49) | (221)
Accounts payable | 247 | 87
Accrued liabilities | 149 | 4,800
Income taxes payable | (124) | 21
Lease liabilities | (2,197) | (2,517)
Deferred tax liability | 49 | (6)
Deferred revenue | (41) | 94
Net cash used in operating activities | (45,083) | (41,388)
Cash flows from investing activities |  |
Purchases of investments | (47,187) | (52,584)
Maturities of investments | 44,280 | 10,000
Purchases of property and equipment | (1,318) | (3,671)
Net cash used in investing activities | (4,225) | (46,255)
Cash flows from financing activities |  |
Repayment of Credit Agreement | (87) | 0
Debt issuance cost | (53) | (41)
Proceeds from exercise of common stock options | 644 | 1,871
Proceeds from issuance of common stock under the employee stock purchase plan | 1,942 | 2,652
Payments for the repurchase of early exercised common stock options | (27) | (26)
Net cash provided by financing activities | 2,419 | 4,456
Effect of exchange rate changes on cash and cash equivalents | 145 | 106
Net decrease in cash and cash equivalents | (46,744) | (83,081)
Cash and cash equivalents at beginning of year | 148,711 | 231,792
Cash, cash equivalents and restricted cash at end of year | 101,967 | 148,711
Reconciliation of cash, cash equivalents and restricted cash to consolidated balance sheets: |  |
Cash and cash equivalents | 101,736 | 148,480
Restricted cash | 231 | 231
Cash, cash equivalents and restricted cash in consolidated balance sheets | 101,967 | 148,711
Supplemental non-cash items: |  |
Lapse in repurchase rights of common stock | 227 | 204
Purchases of property and equipment in accounts payable and accrued liabilities | 425 | 584
Operating lease right of use assets obtained in exchange for new lease liabilities | 229 | 1,460
Amount receivable from exercise of Options | 0 | 10
Supplemental disclosure of cash flow information: |  |
Cash paid for income taxes | 398 | 322
Cash paid for interest | $ 847 | $ 722

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