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Selected Statement of Operations Data (Details) - Schedule of financial income (expense) - net - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Schedule of financial income (expense) - net [Abstract] |  |  |
Interest on bank deposits and short-term investments | $ 172 | $ 219 | $ 208
Non-dollar currency gains, net | 147 | 89 |
Income from marketable securities | 83 | 165 | 77
Realized gain from sale of available-for-sale securities |  | 24 | 28
Interest on available-for-sale securities |  |  | 27
Other Nonoperating Income | 402 | 497 | 340
Non-dollar currency losses, net |  |  | (107)
Bank commissions and charges | (23) | (14) | (11)
Other Nonoperating Expense | (23) | (14) | (118)
Financial income (expense) - net | $ 379 | $ 483 | $ 222

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