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Note 7 - Taxes on Income (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] |
|  | 201 7 |  |  | 201 6 |  |  | 201 5 |
Current: |  |  |  |  |  |  |  |  |  |  |  |
Federa l |  | $ | 2,846 |  |  | $ | 5,642 |  |  | $ | 6,527 |
Tax Cut and Jobs Ac t |  |  | 265 |  |  |  | - |  |  |  | - |
State and loca l |  |  | 647 |  |  |  | 628 |  |  |  | 519 |
Foreig n |  |  | 338 |  |  |  | - |  |  |  | - |
|  |  | 4,096 |  |  |  | 6,270 |  |  |  | 7,046 |
Long Term : |  |  |  |  |  |  |  |  |  |  |  |
Tax Cut and Jobs Ac t |  |  | 1,336 |  |  |  | - |  |  |  | - |
Deferred Taxes : |  |  |  |  |  |  |  |  |  |  |  |
Deferred tax provision (benefit ) |  |  | 1,899 |  |  |  | (1,010 | ) |  |  | (1,216 | )
Tax Cut and Jobs Act re-measuremen t |  |  | 2,429 |  |  |  | - |  |  |  | - |
|  |  | 4,328 |  |  |  | (1,010 | ) |  |  | (1,216 | )
|  | $ | 9,760 |  |  | $ | 5,260 |  |  | $ | 5,830 |
Schedule of Deferred Tax Assets and Liabilities [Table Text Block] |
|  | 2017 |  |  | 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 |
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] |
|  | 2017 |  |  | 2016 |  |  | 2015 |
Statutory Federal income tax rate |  |  | 34.0 | % |  |  | 34.0 | % |  |  | 34.0 | %
State and local income taxes, net of Federal income tax benefit |  |  | 1.5 |  |  |  | 1.9 |  |  |  | 1.6 |
Effect of change in unrecognized tax benefit |  |  | - |  |  |  | - |  |  |  | (0.1 | )
Current year untaxed foreign income |  |  | (6.5 | ) |  |  | (5.1 | ) |  |  | (6.0 | )
Foreign Taxes |  |  | 1.4 |  |  |  | - |  |  |  | - |
Non-deductible share-based employee compensation expense |  |  | 1.1 |  |  |  | 1.2 |  |  |  | 1.3 |
Excess tax benefit from stock compensation |  |  | (7.2 | ) |  |  | (4.4 | ) |  |  | - |
Federal tax credits |  |  | (0.5 | ) |  |  | (0.8 | ) |  |  | - |
Tax Cut and Jobs Act deferred tax re-measurement |  |  | 6.9 |  |  |  | - |  |  |  | - |
Tax on undistributed foreign earnings |  |  | 2.9 |  |  |  | - |  |  |  | - |
Transition tax (repatriation) |  |  | 5.9 |  |  |  | - |  |  |  | - |
Other items |  |  | (0.1 | ) |  |  | (0.4 | ) |  |  | 0.1 |
Effective income tax rate |  |  | 39.4 | % |  |  | 26.4 | % |  |  | 30.9 | %
Summary of Income Tax Contingencies [Table Text Block] |
(In thousands ) |  |  |  |  |  |  |  |
|  | 201 7 |  |  | 201 6 |
Balance at January 1, |  | $ | 399 |  |  | $ | 399 |
Additions based on tax positions related to the current yea r |  |  | 59 |  |  |  | 55 |
Additions for tax positions of prior year s |  |  | - |  |  |  | 4 |
Reductions due to lapse of statute of limitation s |  |  | (58 | ) |  |  | (59 | )
Balance at December 31 , |  | $ | 400 |  |  | $ | 399 |

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 + Details
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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- Definition Tabular disclosure for tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities and other income tax contingencies. Includes, but is not limited to, interest and penalties, reconciliation of unrecognized tax benefits, unrecognized tax benefits that would affect the effective tax rate, tax years that remain subject to examination by tax jurisdictions, and information about positions for which it is reasonably possible that amounts unrecognized will significantly change within 12 months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32840-109319 + Details
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