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Selected Statement of Operations Data (Details) - Schedule of financial income (expense) - net - USD ($)
$ in Thousands
 12 Months Ended
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