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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Cash flows from operating activities      
Net income (loss) $ (26,413) $ 18,306 $ 10,541
Adjustments required to reconcile net income to net cash provided by (used in) operating activities:      
Depreciation and amortization 2,497 2,415 2,437
Impairment of intangible assets 5,264 0 0
Impairment of goodwill 25,561 0 0
Write-down of obsolete inventory 6,433 3,002 5,246
Changes in marketable securities (140) (20) 621
Share-based compensation expense 3,353 3,577 2,862
Deferred taxes, net (1,885) 1,178 48
Changes in assets and liabilities:      
Accounts receivable - trade 2,239 3,695 (9,472)
Accounts receivable - other (138) 396 1,217
Change in liability for employees' severance benefits, net (395) 149 138
Inventories 29,909 (15,289) (33,526)
Trade accounts payable (11,508) (12,410) 15,031
Other accounts payable and accrued expenses (2,852) (9,089) 5,936
Net cash provided by (used in) operating activities 31,925 (4,090) 1,079
Cash flows from investing activities      
Proceeds from short term bank deposits 0 0 5,000
Purchase of property, plant and equipment (1,122) (2,089) (2,586)
Investment in intangible assets (1,092) (2,603) (3,572)
Proceeds from maturity of marketable securities 4,000 16,029 37,850
Purchases of marketable securities (9,623) (3,998) (19,927)
Other 320 934 0
Net cash provided by (used in) investing activities (7,517) 8,273 16,765
Cash flows from financing activities      
Exercise of options and RSUs 762 0 0
Purchase of treasury shares (9,320) (3,428) (14,291)
Proceeds from reissuance of treasury shares upon exercise of options 585 2,377 4,514
Net cash used in financing activities (7,973) (1,051) (9,777)
Effect of exchange rate changes on cash balances held (197) (1,683) 542
Increase in cash and cash equivalents 16,238 1,449 8,609
Cash and cash equivalents at beginning of year 30,734 29,285 20,676
Cash and cash equivalents at end of year 46,972 30,734 29,285
Supplementary cash flow information Non-cash transactions:      
Additions of right of use assets and lease liabilities 388 1,433 451
Termination of lease agreements (620) 0 0
Investments in property, plant and equipment 54 37 59
Non-cash Transactions Including Investments and right of use assets and lease liabilities (178) 1,470 510
Cash paid (received) during the year for:      
Income taxes $ 601 $ (411) $ 2,371