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Taxes on Income (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Taxes on Income (Textual)
Loss carry forward	$ 32,500
Accumulated capital losses	23,600
Uncertain tax positions	$ 60	$ 58
Israeli [Member]
Taxes on Income (Textual)
Corporate tax rate	24.00%	25.00%	26.50%
Corporate tax rate, description	On December 30, 2016, as part of the Economic Efficiency Law (Legislative Amendments for Accomplishment of Budgetary Targets for Budget Years 2017-2018), 5777-2016, the corporate tax rate was reduced to 24% for the 2017 tax year and to 23% in 2018 tax year and thereafter.

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Taxes on income textua

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to revisions of previously reported income tax expense.

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A brief description of status of the tax examination, significant findings to date, and the entity's position with respect to the findings.

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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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Amount of unrecognized tax benefits.

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