Taxes on Income (Details 3) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Taxes on Income [Abstract]
Income before taxes on income, as reported in the statements of operations	$ 6,209	$ 5,372	$ 6,302
Theoretical tax expense	1,428	1,343	1,670
Less - tax benefits arising from approved enterprise status, see a. above	(1,110)	(208)	(271)
Theoretical tax expense net of tax benefits	318	1,135	1,399
Increase (decrease) in taxes resulting from permanent differences:
Disallowable deductions	41	42	42
Taxes in respect of previous years			(52)
Changes in valuation allowance	244	373	(747)
Changes in taxes resulting from computation of deferred taxes at a rate which is different from the theoretical rate and other	(6)	(381)	642
Taxes on income for the reported years:	597	1,169	1,284
As follows:
Taxable in Israel	5,162	4,406	5,346
Taxable outside Israel	1,047	966	956
Total	$ 6,209	$ 5,372	$ 6,302

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The sum of the theoretical income tax expense pertaining to continuing operations.

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The sum of the theoretical income tax expense pertaining to continuing operations net of tax benefits arising from approved enterprise status.

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The portion of earnings or loss from continuing operations before income taxes that is attributable to domestic operations.

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Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount 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 increase (decrease) in the valuation allowance for deferred tax assets.

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Amount 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 (benefit).

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