Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt - Schedule of Long-Term Debt (Details)

v2.4.1.9
Long-Term Debt - Schedule of Long-Term Debt (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Debt Instrument [Line Items]    
Long term debt $ 540us-gaap_LongTermDebt  
Less: current maturities (303)us-gaap_LongTermDebtCurrent (299)us-gaap_LongTermDebtCurrent
Long-term debt, net of current portion 237us-gaap_LongTermDebtNoncurrent 315us-gaap_LongTermDebtNoncurrent
May 2011 Through October 2014 | Contractual Obligation    
Debt Instrument [Line Items]    
Long term debt $ 540us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= ingn_MayTwoThousandElevenThroughOctoberTwoThousandFourteenMember
/ us-gaap_LongtermDebtTypeAxis
= ingn_ContractualObligationMember
$ 614us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= ingn_MayTwoThousandElevenThroughOctoberTwoThousandFourteenMember
/ us-gaap_LongtermDebtTypeAxis
= ingn_ContractualObligationMember