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Segment Information and Significant Customers (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2018 USD ($) Segments Customers | Mar. 31, 2017 USD ($) Customers | Dec. 31, 2017 USD ($) Customers
Segment Information and Significant Customers (Textual) |  |  |
Number of reportable segments | Segments | 1 |  |
Sales | $ 4,066 | $ 6,419 |
Accounts receivable due from the related party | 2,503 |  | $ 3,017
Related party entity [Member] |  |  |
Segment Information and Significant Customers (Textual) |  |  |
Sales | $ 417 | $ 108 |
Related party entity owned percentage | 20.00% |  |
Accounts Receivable [Member] |  |  |
Segment Information and Significant Customers (Textual) |  |  |
Percent from major customers | 58.00% |  | 49.00%
Number of major customers | Customers | 2 |  | 2
Revenue [Member] |  |  |
Segment Information and Significant Customers (Textual) |  |  |
Percent from major customers | 67.00% | 68.00% |
Number of major customers | Customers | 4 | 1 |

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