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General - Additional Information (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
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3 Months Ended |
12 Months Ended |
0 Months Ended |
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Mar. 31, 2015
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Mar. 31, 2014
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Dec. 31, 2014
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Dec. 31, 2009
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Feb. 20, 2014
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| General Disclosures [Line Items] |
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| Revenues |
$ 33,752us-gaap_Revenues
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$ 23,633us-gaap_Revenues
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| Net income |
1,572us-gaap_NetIncomeLoss
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888us-gaap_NetIncomeLoss
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6,800us-gaap_NetIncomeLoss
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2,600us-gaap_NetIncomeLoss
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| Common stock, shares outstanding |
19,282,247us-gaap_CommonStockSharesOutstanding
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19,059,364us-gaap_CommonStockSharesOutstanding
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| Deemed dividend on redeemable convertible preferred stock |
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987us-gaap_TemporaryEquityAccretionOfDividends
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| Redeemable Convertible Preferred Stock |
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| General Disclosures [Line Items] |
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| Preferred stock outstanding |
0us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RedeemableConvertiblePreferredStockMember
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0us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RedeemableConvertiblePreferredStockMember
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| Convertible Preferred Stock |
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| General Disclosures [Line Items] |
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| Preferred stock outstanding |
0us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember
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0us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember
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| Initial Public Offering (IPO) |
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| General Disclosures [Line Items] |
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| Number of shares sold |
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4,511,313us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_IPOMember
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| Shares sold, price per share |
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$ 16.00us-gaap_SharesIssuedPricePerShare
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_IPOMember
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| Amount after underwriters discount and other associated expenses |
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49,668ingn_AmountAfterUnderwritersDiscountAndOtherAssociatedExpense
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_IPOMember
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| Initial Public Offering (IPO) | Common stock |
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| General Disclosures [Line Items] |
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| Conversion of preferred stock, shares |
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14,259,647us-gaap_ConversionOfStockSharesIssued1
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_IPOMember
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| Initial Public Offering (IPO) | Stockholders |
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| General Disclosures [Line Items] |
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| Number of shares sold |
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981,902us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
/ us-gaap_StatementClassOfStockAxis
= ingn_StockholdersMember
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_IPOMember
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| Initial Public Offering (IPO) | Redeemable Convertible Preferred Stock |
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| General Disclosures [Line Items] |
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| Convertible preferred stock, shares issued upon conversion |
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9,546,140us-gaap_ConversionOfStockSharesConverted1
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RedeemableConvertiblePreferredStockMember
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_IPOMember
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| Deemed dividend on redeemable convertible preferred stock |
|
987us-gaap_TemporaryEquityAccretionOfDividends
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RedeemableConvertiblePreferredStockMember
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_IPOMember
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| Initial Public Offering (IPO) | Convertible Preferred Stock |
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| General Disclosures [Line Items] |
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| Convertible preferred stock, shares issued upon conversion |
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66,666us-gaap_ConversionOfStockSharesConverted1
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_IPOMember
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| Initial Public Offering (IPO) | Inogen, Inc. |
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| General Disclosures [Line Items] |
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| Number of shares sold |
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3,529,411us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_IPOMember
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| Comfort Life Medical, LLC |
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| General Disclosures [Line Items] |
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| Revenues |
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$ 112,500us-gaap_Revenues
/ us-gaap_BusinessAcquisitionAxis
= ingn_ComfortLifeMedicalLLCMember
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$ 10,700us-gaap_Revenues
/ us-gaap_BusinessAcquisitionAxis
= ingn_ComfortLifeMedicalLLCMember
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| Non U S Revenue |
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| General Disclosures [Line Items] |
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| Concentration risk, percentage |
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22.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_StatementBusinessSegmentsAxis
= ingn_NonUSRevenueMember
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| Oxygen Rentals |
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| General Disclosures [Line Items] |
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| Concentration risk, percentage |
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35.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_StatementBusinessSegmentsAxis
= ingn_OxygenRentalsMember
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| Minimum |
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| General Disclosures [Line Items] |
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| Weight of oxygen portable device |
4.8ingn_WeightOfPortableOxygenDevice
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
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| Percentage of patients using portable oxygen concentrators |
5.00%ingn_PatientsUsingPortableOxygenConcentrators
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
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| Minimum | Inogen One |
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| General Disclosures [Line Items] |
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| Number of customers |
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66,000ingn_NumberOfCustomers
/ us-gaap_ProductOrServiceAxis
= ingn_InogenOneMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
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| Maximum |
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| General Disclosures [Line Items] |
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| Weight of oxygen portable device |
7.0ingn_WeightOfPortableOxygenDevice
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
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| Percentage of patients using portable oxygen concentrators |
7.00%ingn_PatientsUsingPortableOxygenConcentrators
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
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| Maximum | One G3 |
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| General Disclosures [Line Items] |
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| Estimated battery life of portable oxygen concentrator |
4 hours 30 minutes
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| Maximum | One G2 |
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| General Disclosures [Line Items] |
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| Estimated battery life of portable oxygen concentrator |
5 hours
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