Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Additional Information (Details)

v2.4.1.9
Summary of Significant Accounting Policies - Additional Information (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
0 Months Ended 12 Months Ended
Feb. 20, 2014
Dec. 31, 2014
Customer
Segment
Product
Dec. 31, 2013
Customer
Dec. 31, 2012
Mar. 07, 2014
Significant Accounting Policies [Line Items]          
Extended service contracts   The second deliverable is the lifetime warranty that provides for a functional oxygen concentrator for the remaining lifetime of the patient      
Number of deliverables qualifying as separate units   2ingn_NumberOfProductsQualifyAsSeparateUnits      
Standard product warranty description   The first deliverable is the oxygen concentrator equipment which comes with a standard warranty of three years      
Estimation for sale of products   the company estimates that 60% of patients will succumb to their disease within three years. Given the approximate mortality rate of 20% per year, the company estimates on average all patients will succumb to their disease within five years.      
Shipping and handling fees earned   $ 486us-gaap_ShippingAndHandlingRevenue $ 376us-gaap_ShippingAndHandlingRevenue $ 214us-gaap_ShippingAndHandlingRevenue  
Accrual of product warranty liability   1,115us-gaap_ProductWarrantyAccrual 809us-gaap_ProductWarrantyAccrual 447us-gaap_ProductWarrantyAccrual  
Rental revenue earned   30-day period      
Unbilled Receivables   3,653us-gaap_UnbilledReceivablesCurrent 1,435us-gaap_UnbilledReceivablesCurrent    
Number of customers   0ingn_NumberOfCustomers 0ingn_NumberOfCustomers    
Accounts Receivable Net Current   19,349us-gaap_AccountsReceivableNetCurrent 10,231us-gaap_AccountsReceivableNetCurrent    
Cost Of Property Repairs And Maintenance   0us-gaap_CostOfPropertyRepairsAndMaintenance      
Property Plant And Equipment Salvage Value   1,628us-gaap_PropertyPlantAndEquipmentSalvageValue 1,020us-gaap_PropertyPlantAndEquipmentSalvageValue    
Impairments of long-lived assets   0us-gaap_ImpairmentOfLongLivedAssetsHeldForUse 0us-gaap_ImpairmentOfLongLivedAssetsHeldForUse    
Advertising costs   3,290us-gaap_AdvertisingExpense 2,840us-gaap_AdvertisingExpense 2,503us-gaap_AdvertisingExpense  
Number Of Operating Segments   1us-gaap_NumberOfOperatingSegments      
Reverse stock split ratio   3:1      
Effective date of reverse stock split   Nov. 12, 2013      
Common stock, par value $ 16.00us-gaap_CommonStockParOrStatedValuePerShare $ 0.001us-gaap_CommonStockParOrStatedValuePerShare $ 0.001us-gaap_CommonStockParOrStatedValuePerShare    
Increase in working capital     844us-gaap_IncreaseDecreaseInOperatingCapital    
Common stock, shares issued 4,411,763us-gaap_CommonStockSharesIssued 19,059,364us-gaap_CommonStockSharesIssued 280,974us-gaap_CommonStockSharesIssued    
Common stock purchased by underwriters         99,550ingn_CommonStockPurchasedByUnderwriters
Conversion of preferred stock, shares 14,259,647us-gaap_ConversionOfStockSharesConverted1        
Inogen, Inc.          
Significant Accounting Policies [Line Items]          
Number of shares sold 3,529,411us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
/ us-gaap_StatementClassOfStockAxis
= ingn_InogenIncMember
       
Stockholders          
Significant Accounting Policies [Line Items]          
Number of shares sold 882,352us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
/ us-gaap_StatementClassOfStockAxis
= ingn_StockholdersMember
       
Customer Concentration Risk          
Significant Accounting Policies [Line Items]          
Accounts Receivable Net Current   4,875us-gaap_AccountsReceivableNetCurrent
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
2,560us-gaap_AccountsReceivableNetCurrent
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
3,043us-gaap_AccountsReceivableNetCurrent
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
 
Sales Revenue, Net          
Significant Accounting Policies [Line Items]          
Shipping and handling costs   1,478us-gaap_ShippingHandlingAndTransportationCosts
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
772us-gaap_ShippingHandlingAndTransportationCosts
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
639us-gaap_ShippingHandlingAndTransportationCosts
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
 
Sales Revenue, Net | Customer Concentration Risk          
Significant Accounting Policies [Line Items]          
Concentration risk, percentage   27.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
29.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
27.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
 
Sales Revenue, Net | Maximum | Customer Concentration Risk | Single Customer          
Significant Accounting Policies [Line Items]          
Concentration risk, percentage   10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= ingn_SingleCustomerMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= ingn_SingleCustomerMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
12.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= ingn_SingleCustomerMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
 
Sales Revenue, Services, Net          
Significant Accounting Policies [Line Items]          
Shipping and handling costs   $ 4,101us-gaap_ShippingHandlingAndTransportationCosts
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueServicesNetMember
$ 3,149us-gaap_ShippingHandlingAndTransportationCosts
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueServicesNetMember
$ 1,922us-gaap_ShippingHandlingAndTransportationCosts
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueServicesNetMember
 
Sales Revenue, Services, Net | Customer Concentration Risk          
Significant Accounting Policies [Line Items]          
Concentration risk, percentage   76.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueServicesNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
73.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueServicesNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
66.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueServicesNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
 
Accounts receivable | Customer Concentration Risk          
Significant Accounting Policies [Line Items]          
Concentration risk, percentage   25.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
25.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
33.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
 
Raw materials | Vendor one          
Significant Accounting Policies [Line Items]          
Concentration risk, percentage   19.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_CostOfGoodsTotalMember
/ us-gaap_ConcentrationRiskByTypeAxis
= ingn_VendorOneMember
17.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_CostOfGoodsTotalMember
/ us-gaap_ConcentrationRiskByTypeAxis
= ingn_VendorOneMember
   
Raw materials | Vendor two          
Significant Accounting Policies [Line Items]          
Concentration risk, percentage   16.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_CostOfGoodsTotalMember
/ us-gaap_ConcentrationRiskByTypeAxis
= ingn_VendorTwoMember
15.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_CostOfGoodsTotalMember
/ us-gaap_ConcentrationRiskByTypeAxis
= ingn_VendorTwoMember
   
Raw materials | Vendor three          
Significant Accounting Policies [Line Items]          
Concentration risk, percentage   10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_CostOfGoodsTotalMember
/ us-gaap_ConcentrationRiskByTypeAxis
= ingn_VendorThreeMember
8.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_CostOfGoodsTotalMember
/ us-gaap_ConcentrationRiskByTypeAxis
= ingn_VendorThreeMember
   
Service Contracts          
Significant Accounting Policies [Line Items]          
Extended service contracts   The Company offers extended service contracts on its Inogen One concentrator line for periods ranging from 12 to 24 months after the end of the standard warranty period