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Note 6 - Income Tax Reconciliation (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | |
|---|---|---|
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Dec. 31, 2014
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Dec. 31, 2013
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| Income tax at federal statutory rate | $ 7,016us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | $ 1,425us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate |
| Effect of permanent differences | 9nhtc_IncomeTaxReconciliationEffectOfPermanentDifferences | 7nhtc_IncomeTaxReconciliationEffectOfPermanentDifferences |
| Change in valuation allowance | (2,070)us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance | 430us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance |
| Foreign rate differential | (5,240)us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential | (1,218)us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential |
| Change in enacted tax rates | 38us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate | (597)us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate |
| Expiration of net operating loss carryforward | 519nhtc_IncomeTaxReconciliationExpirationOfNetOperatingLossCarryforward | |
| Other reconciling items | (6)us-gaap_IncomeTaxReconciliationOtherReconcilingItems | 55us-gaap_IncomeTaxReconciliationOtherReconcilingItems |
| Income tax provision | $ 266us-gaap_IncomeTaxExpenseBenefit | $ 102us-gaap_IncomeTaxExpenseBenefit |
| X | ||||||||||
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- Definition
Effect of permanent differences. No definition available.
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| X | ||||||||||
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- Definition
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 expiration of net operating loss carryforward. No definition available.
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| X | ||||||||||
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- Definition
Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
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 income tax rates. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
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 foreign income tax expense (benefit). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
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 tax exempt income, equity in earnings (loss) of an unconsolidated subsidiary, minority noncontrolling interest income (loss), tax holiday, disposition of a business, disposition of an asset, repatriation of foreign earnings, repatriation of foreign earnings jobs creation act of 2004, increase (decrease) in enacted tax rate, prior year income taxes, increase (decrease) in deferred tax asset valuation allowance, and other adjustments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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