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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 | $ 18,306 | $ 10,541 | $ 5,725
Adjustments required to reconcile net income to net cash provided by (used in) operating activities: |  |  |
Depreciation and amortization | 2,415 | 2,437 | 2,384
Impairment of intangible assets | 0 | 0 | 1,657
Write-down of obsolete inventory | 3,002 | 5,246 | 1,578
Changes in marketable securities | (20) | 621 | 244
Share-based compensation expense | 3,577 | 2,862 | 2,711
Deferred taxes, net | 1,178 | 48 | (61)
Changes in assets and liabilities: |  |  |
Accounts receivable - trade | 3,695 | (9,472) | 3,467
Accounts receivable - other | 396 | 1,217 | (1,362)
Change in liability for employees' severance benefits, net | 149 | 138 | 153
Inventories | (15,289) | (33,526) | (13,336)
Trade accounts payable | (12,410) | 15,031 | (2,076)
Other accounts payable and accrued expenses | (9,089) | 5,936 | 3,872
Net cash provided by (used in) operating activities | (4,090) | 1,079 | 4,956
Cash flows from investing activities |  |  |
Proceeds from short term bank deposits, net | 0 | 5,000 | 8,542
Purchase of property, plant and equipment | (2,089) | (2,586) | (1,694)
Investment in intangible assets | (2,603) | (3,572) | (1,487)
Proceeds from maturity of marketable securities | 16,029 | 37,850 | 16,629
Purchases of marketable securities | (3,998) | (19,927) | (6,558)
Other | 934 | 0 | 0
Net cash provided by investing activities | 8,273 | 16,765 | 15,432
Cash flows from financing activities |  |  |
Exercise of options | 0 | 0 | 276
Purchase of treasury shares | (3,428) | (14,291) | (16,798)
Proceeds from reissuance of treasury shares upon exercise of options | 2,377 | 4,514 | 0
Net cash used in financing activities | (1,051) | (9,777) | (16,522)
Effect of exchange rate changes on cash balances held | (1,683) | 542 | 341
Increase in cash and cash equivalents | 1,449 | 8,609 | 4,207
Cash and cash equivalents at beginning of year | 29,285 | 20,676 | 16,469
Cash and cash equivalents at end of year | 30,734 | 29,285 | 20,676
Supplementary cash flow information Non-cash transactions: |  |  |
Recognition of right of use assets and lease liabilities | 1,433 | 451 | 7,201
Investments in property, plant and equipment | 37 | 59 | 347
Non-cash Transactions Including Investments and right of use assets and lease liabilities | 1,470 | 510 | 7,548
Cash paid (received) during the year for: |  |  |
Income taxes | $ (411) | $ 2,371 | $ 1,284

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