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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Cash flows from operating activities: |  |  |
Net income (loss) | $ 28,182 | $ 13,254 | $ (29,271)
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation | 12,260 | 12,546 | 11,737
Amortization of intangibles | 0 | 507 | 3,970
Stock-based compensation | 25,212 | 24,056 | 18,040
Amortization of convertible debt discount | 1,171 | 6,308 | 7,058
Amortization of warrant | 1,734 | 1,741 | 1,746
Foreign currency remeasurement | (2,685) | (5,126) | 6,391
Loss on convertible debt extinguishment | 0 | 0 | 1,362
Deferred income taxes, net | 4,894 | (6,197) | (105)
Provision for expected credit losses and returns | 1,954 | 4,142 | 1,666
Provision for excess and obsolete inventories | 5,988 | 3,460 | 1,847
Gain on sale of investment in equity securities | (4,370) | 0 | 0
Other adjustments | 513 | 181 | 409
Changes in operating assets and liabilities: |  |  |
Accounts receivable | (23,136) | (26,722) | 21,186
Inventories | (54,431) | (39,338) | (8,195)
Other assets | (8,402) | (3,096) | 11,556
Accounts payable | 5,837 | 42,303 | (18,173)
Deferred revenues | 2,610 | 15,014 | 19,751
Other liabilities | 8,145 | (2,016) | (11,812)
Net cash provided by operating activities | 5,476 | 41,017 | 39,163
Cash flows from investing activities: |  |  |
Proceeds from sale of investment | 7,962 | 0 | 0
Purchases of property and equipment | (9,250) | (12,975) | (32,205)
Net cash used in investing activities | (1,288) | (12,975) | (32,205)
Cash flows from financing activities: |  |  |
Payment of convertible debt | (37,707) | 0 | (7,999)
Payment of convertible debt issuance costs | 0 | 0 | (672)
Proceeds from other debts | 3,499 | 3,861 | 9,398
Repayment of other debts | (4,583) | (6,169) | (6,646)
Repurchase of common stock | (5,133) | 0 | 0
Proceeds from common stock issued to employees | 7,092 | 12,311 | 5,472
Taxes paid related to net share settlement of equity awards | (6,301) | (2,064) | (1,662)
Net cash provided by (used in) financing activities | (43,133) | 7,939 | (2,109)
Effect of exchange rate changes on cash and cash equivalents | (4,900) | (1,195) | 738
Net increase (decrease) in cash and cash equivalents | (43,845) | 34,786 | 5,587
Cash and cash equivalents, beginning of the year | 133,431 | 98,645 | 93,058
Cash and cash equivalents, end of the year | 89,586 | 133,431 | 98,645
Supplemental disclosure of cash flow information: |  |  |
Income tax payments (refunds), net | 9,036 | 2,525 | (17)
Interest payments, net | 3,796 | 4,095 | 4,221
Supplemental schedule of non-cash investing and financing activities: |  |  |
Capital expenditures incurred but not yet paid | 1,075 | 751 | 1,155
Fair value of 2022 Notes used to settle 2020 Notes | $ 0 | $ 0 | $ 44,357

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