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Shareholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 12 Months Ended
--- | --- | ---
Oct. 20, 2017 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Shareholders' Equity (Details) [Line Items] |  |  |  |
Ordinary shares issued |  | 5,189 |  |
Ordinary shares held by the company |  | 30,843 |  |
Restricted Stock Units (RSUs) [Member] |  |  |  |
Shareholders' Equity (Details) [Line Items] |  |  |  |
Shares available for future grants |  | 35,100 | 388,020 |
Stock option vesting period |  |  | 4 years |
Weighted average fair values of options granted (in Dollars per share) |  | $ 9.31 | $ 7.86 | $ 19.68
Compensation cost (in Dollars) |  | $ 2,107 | $ 1,887 | $ 1,359
Unrecognized costs related to non-vested share-based compensation (in Dollars) |  | $ 2,277 |  |
Recognized over a weighted average period |  | 11 months 26 days |  |
Restricted Stock Units (RSUs) [Member] | Minimum [Member] |  |  |  |
Shareholders' Equity (Details) [Line Items] |  |  |  |
Stock option vesting period |  | 2 years |  |
Restricted Stock Units (RSUs) [Member] | Maximum [Member] |  |  |  |
Shareholders' Equity (Details) [Line Items] |  |  |  |
Stock option vesting period |  | 4 years |  |
2013 Share Option Plan [Member] |  |  |  |
Shareholders' Equity (Details) [Line Items] |  |  |  |
Ordinary shares issued |  | 600,001 |  |
Shares available for future grants |  | 340,000 |  |
Increase number of shares reserved under share option plan |  | 2,450,000 |  |
Employee Stock Option [Member] |  |  |  |
Shareholders' Equity (Details) [Line Items] |  |  |  |
Weighted average fair values of options granted (in Dollars per share) |  | $ 3.41 |  |
Follow-on public offering [Member] |  |  |  |
Shareholders' Equity (Details) [Line Items] |  |  |  |
Ordinary shares issued | 1 |  |  |

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