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Nature of Operations (Schedule of Details of Impairment) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Impairment [Line Items] |  |  |  |  |
Total |  |  |  | $ 872 |
Reorganization and impairment |  |  |  | (4,059) | [1]
Cost of Revenues |  | $ 62,378 | $ 47,966 | 46,738 | [1]
Inventory write-off and other [Member] |  |  |  |  |
Impairment [Line Items] |  |  |  |  |
Cost of Revenues |  |  |  | 4,931 |
Revaluation of IIA liabilities [Member] |  |  |  |  |
Impairment [Line Items] |  |  |  |  |
Reorganization and impairment | [2] |  |  | (4,962) |
Other [Member] |  |  |  |  |
Impairment [Line Items] |  |  |  |  |
Reorganization and impairment |  |  |  | $ 903 |
[1] | Reclassified - due to presenting PCB operation as discontinued operation - See Note 19
[2] | see Note 10E

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