Intangible Assets - Additional Information (Details) (USD $) In Thousands, unless otherwise specified
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3 Months Ended |
12 Months Ended |
Mar. 31, 2015
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Mar. 31, 2014
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Dec. 31, 2014
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Dec. 31, 2008
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Dec. 31, 2011
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Dec. 31, 2009
Patents
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Finite Lived Intangible Assets [Line Items] |
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Estimated useful life of intangible asset |
2 years
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Purchased additional patents |
$ 11us-gaap_PaymentsToAcquireIntangibleAssets
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$ 169us-gaap_PaymentsToAcquireIntangibleAssets
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Amortization of intangible assets |
21us-gaap_AmortizationOfIntangibleAssets
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39us-gaap_AmortizationOfIntangibleAssets
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Patient setup video, Website development, redesign and commercials |
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Finite Lived Intangible Assets [Line Items] |
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Cost incurred for advertising |
11us-gaap_AdvertisingRevenueCost / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = ingn_PatientSetupVideoWebsiteDevelopmentRedesignAndCommercialsMember
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169us-gaap_AdvertisingRevenueCost / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = ingn_PatientSetupVideoWebsiteDevelopmentRedesignAndCommercialsMember
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Comfort Life Medical, LLC |
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Finite Lived Intangible Assets [Line Items] |
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Acquisition of intangible asset |
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92us-gaap_FinitelivedIntangibleAssetsAcquired1 / dei_LegalEntityAxis = ingn_ComfortLifeMedicalLLCMember
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Estimated useful life of intangible asset |
10 years
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Impairments |
0us-gaap_AssetImpairmentCharges / dei_LegalEntityAxis = ingn_ComfortLifeMedicalLLCMember
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0us-gaap_AssetImpairmentCharges / dei_LegalEntityAxis = ingn_ComfortLifeMedicalLLCMember
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Air Products & Chemicals |
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Finite Lived Intangible Assets [Line Items] |
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Acquisition of intangible asset |
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250us-gaap_FinitelivedIntangibleAssetsAcquired1 / dei_LegalEntityAxis = ingn_AirProductsChemicalsMember
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Estimated useful life of intangible asset |
5 years
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Impairments |
0us-gaap_AssetImpairmentCharges / dei_LegalEntityAxis = ingn_AirProductsChemicalsMember
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0us-gaap_AssetImpairmentCharges / dei_LegalEntityAxis = ingn_AirProductsChemicalsMember
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Number of patents |
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4us-gaap_GainContingencyPatentsFoundInfringedUponNumber / dei_LegalEntityAxis = ingn_AirProductsChemicalsMember
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Increase in long term liability |
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250us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesLongTermDebt / dei_LegalEntityAxis = ingn_AirProductsChemicalsMember
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Purchased additional patents |
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650us-gaap_PaymentsToAcquireIntangibleAssets / dei_LegalEntityAxis = ingn_AirProductsChemicalsMember
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Breathe Oxygen Services, LLC |
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Finite Lived Intangible Assets [Line Items] |
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Acquisition of intangible asset |
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66us-gaap_FinitelivedIntangibleAssetsAcquired1 / dei_LegalEntityAxis = ingn_BreatheOxygenServicesLLCMember
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Estimated useful life of intangible asset |
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10 years
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Impairments |
$ 0us-gaap_AssetImpairmentCharges / dei_LegalEntityAxis = ingn_BreatheOxygenServicesLLCMember
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$ 0us-gaap_AssetImpairmentCharges / dei_LegalEntityAxis = ingn_BreatheOxygenServicesLLCMember
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