Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets - Summary of Intangible Assets (Details)

v2.4.1.9
Intangible Assets - Summary of Intangible Assets (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Finite Lived Intangible Assets [Line Items]    
Estimated useful life of intangible asset 2 years  
Gross carrying amount $ 1,197us-gaap_FiniteLivedIntangibleAssetsGross $ 1,186us-gaap_FiniteLivedIntangibleAssetsGross
Accumulated amortization 937us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization 916us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Net carrying amount 260us-gaap_FiniteLivedIntangibleAssetsNet 270us-gaap_FiniteLivedIntangibleAssetsNet
Licenses    
Finite Lived Intangible Assets [Line Items]    
Estimated useful life of intangible asset 10 years 10 years
Gross carrying amount 185us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= ingn_LicensesMember
185us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= ingn_LicensesMember
Accumulated amortization 86us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= ingn_LicensesMember
81us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= ingn_LicensesMember
Net carrying amount 99us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= ingn_LicensesMember
104us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= ingn_LicensesMember
Patents And Websites    
Finite Lived Intangible Assets [Line Items]    
Estimated useful life of intangible asset 5 years 5 years
Gross carrying amount 873us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= ingn_PatentsAndWebsitesMember
873us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= ingn_PatentsAndWebsitesMember
Accumulated amortization 756us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= ingn_PatentsAndWebsitesMember
749us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= ingn_PatentsAndWebsitesMember
Net carrying amount 117us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= ingn_PatentsAndWebsitesMember
124us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= ingn_PatentsAndWebsitesMember
Commercial    
Finite Lived Intangible Assets [Line Items]    
Estimated useful life of intangible asset 2 years 2 years
Gross carrying amount 139us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= ingn_CommercialMember
128us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= ingn_CommercialMember
Accumulated amortization 95us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= ingn_CommercialMember
86us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= ingn_CommercialMember
Net carrying amount $ 44us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= ingn_CommercialMember
$ 42us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= ingn_CommercialMember