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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