Income Taxes (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Schedule of reconciliation of income tax provision from continuing operations and statutory rate
Tax expense at statutory rate	$ 5,223	$ 3,975
Increase (decrease) in tax resulting from:
State income tax, net of federal benefit	694	460
Domestic Production Activities deduction	(415)	(134)
Change in uncertain tax position reserves	110	(34)
Permanent differences	95	285
Intangible tax basis valuation adjustment	0	(546)
Impact of foreign rate differences and adjustments	(94)	(665)
Foreign permanent differences		70
Prior year R&D tax credits	(1,100)
Income tax provision from continuing operations	$ 4,513	$ 3,411

Income tax reconciliation foreign permanent differences.

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Income tax reconciliation intangible tax basis valuation adjustment.

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Income tax reconciliation permanent differences.

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Income tax reconciliation uncertain tax position reserves.

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Prior year research tax credit.

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The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to pretax Income or Loss from continuing operations; income tax expense or benefit may include interest and penalties on tax uncertainties based on the entity's accounting policy.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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The portion of the difference between total income tax expense or benefit as reported in the Income Statement for the period and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to the deduction for qualified production activities received under enacted tax laws.

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The portion of the difference, between total income tax expense or benefit as reported in the Income Statement for the period and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations, that is attributable to total foreign income tax expense or benefit. The foreign income tax expense or benefit difference represents the income tax expense or benefit at applicable domestic statutory income tax rates applied to foreign earnings or loss for the period versus the foreign income tax expense or benefit calculated by applying the appropriate foreign tax rates.

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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