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Note 7 - Taxes on Income - Deferred Income Tax Asset (Liability) (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Deferred income tax assets: |  |
Pension accruals | $ 2,606 | $ 3,581
Operating reserves and other accruals | 2,174 | 3,656
Tax carrying value in excess of book basis of goodwill | 866 | 1,377
Tax credits | 255 | 99
Valuation allowance on tax credits | (255) |
Deferred income tax liabilities: |  |
Book carrying value in excess of tax basis of property | (937) | (827)
Deferred expenses | (1,809) | (1,086)
Net deferred income tax asset | $ 2,900 | $ 6,800

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