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Income Taxes - Reconciliation of the Federal Statutory Income Tax Rate to the Effective Income Tax Rate (Details)
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12 Months Ended | ||
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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| Effective Income Tax Rate Continuing Operations Tax Rate Reconciliation [Abstract] | |||
| U.S. Statutory rate | 34.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate | 34.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate | 34.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate |
| State income taxes (net of federal benefit) | 2.47%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes | 5.48%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes | 4.53%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes |
| Nondeductible expenses | 1.39%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense | 2.54%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense | (2.77%)us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense |
| Remeasured deferred for state rate change | (0.25%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingenciesStateAndLocal | (8.25%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingenciesStateAndLocal | (137.26%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingenciesStateAndLocal |
| Change in valuation allowance | (12.16%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance | (595.34%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance | 105.55%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance |
| R&D credit (net of reserve) | (3.49%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch | ||
| Expiration of net operating losses | 8.09%ingn_EffectiveIncomeTaxRateReconciliationNetOperatingLossExpiration | ||
| Other | 2.04%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments | 0.58%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments | (1.02%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments |
| Effective income tax rate | 32.09%us-gaap_EffectiveIncomeTaxRateContinuingOperations | (560.99%)us-gaap_EffectiveIncomeTaxRateContinuingOperations | 3.03%us-gaap_EffectiveIncomeTaxRateContinuingOperations |
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- Definition
Effective income tax rate reconciliation net operating loss expiration. No definition available.
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- Definition
Percentage 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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- Details
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- Definition
Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage 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 changes in the valuation allowance for deferred tax assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage 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 nondeductible expenses. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage 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 other adjustments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage 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 applicable to state and local income tax expense (benefit), net of federal tax expense (benefit). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage 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 state and local income tax contingency. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage 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 research tax credit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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