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Summary of Significant Accounting Policies - Additional Information (Details) (USD $)
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3 Months Ended |
12 Months Ended |
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Mar. 31, 2015
Product
Segment
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Mar. 31, 2014
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Dec. 31, 2014
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Dec. 31, 2013
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| Significant Accounting Policies [Line Items] |
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| Extended service contracts |
The second deliverable is the lifetime warranty that provides for a functional oxygen concentrator for the remaining lifetime of the patient
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| Accrual of product warranty liability |
$ 1,391,000us-gaap_ProductWarrantyAccrual
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1,115,000us-gaap_ProductWarrantyAccrual
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$ 809,000us-gaap_ProductWarrantyAccrual
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| Standard product warranty description |
The first deliverable is the oxygen concentrator equipment which comes with a standard warranty of three years
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| Number of deliverables qualifying as separate units |
2ingn_NumberOfProductsQualifyAsSeparateUnits
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| 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.
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| Rental revenue earned |
30-day period
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| Unbilled Receivables |
3,339,000us-gaap_UnbilledReceivablesCurrent
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3,653,000us-gaap_UnbilledReceivablesCurrent
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| Accounts Receivable Net Current |
21,808,000us-gaap_AccountsReceivableNetCurrent
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19,349,000us-gaap_AccountsReceivableNetCurrent
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| Salvage value of expenditures for additions, improvements and replacements |
0us-gaap_PropertyPlantAndEquipmentSalvageValue
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| Repairs and maintenance expense |
570,000us-gaap_CostOfPropertyRepairsAndMaintenance
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390,000us-gaap_CostOfPropertyRepairsAndMaintenance
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| Depreciation and amortization |
3,423,000us-gaap_Depreciation
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2,619,000us-gaap_Depreciation
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| Number of business segment |
1ingn_NumberOfBusinessSegment
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| Construction In Progress And Computer Software |
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| Significant Accounting Policies [Line Items] |
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| Depreciation and amortization |
0us-gaap_Depreciation
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= ingn_ConstructionInProgressAndComputerSoftwareMember
|
0us-gaap_Depreciation
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= ingn_ConstructionInProgressAndComputerSoftwareMember
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| Customer Concentration Risk |
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| Significant Accounting Policies [Line Items] |
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| Accounts Receivable Net Current |
$ 6,572,000us-gaap_AccountsReceivableNetCurrent
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
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4,875,000us-gaap_AccountsReceivableNetCurrent
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
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| Sales Revenue, Net |
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| Significant Accounting Policies [Line Items] |
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| Number of customers |
0ingn_NumberOfCustomers
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
|
0ingn_NumberOfCustomers
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
|
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| Sales Revenue, Net | Customer Concentration Risk |
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| Significant Accounting Policies [Line Items] |
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| Concentration risk, percentage |
26.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
|
22.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
|
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| Sales Revenue, Net | Maximum | Customer Concentration Risk | Single Customer |
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| Significant Accounting Policies [Line Items] |
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| 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
|
|
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| Accounts Receivable |
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| Significant Accounting Policies [Line Items] |
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| Number of customers |
0ingn_NumberOfCustomers
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
|
0ingn_NumberOfCustomers
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
|
|
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| Accounts Receivable | Customer Concentration Risk |
|
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| Significant Accounting Policies [Line Items] |
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| Concentration risk, percentage |
30.00%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
|
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| Accounts Receivable | Maximum | Customer Concentration Risk | Single Customer |
|
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| Significant Accounting Policies [Line Items] |
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|
|
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| Concentration risk, percentage |
10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ 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_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= ingn_SingleCustomerMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
|
|
|
| Sales Revenue, Services, Net | Customer Concentration Risk |
|
|
|
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| Significant Accounting Policies [Line Items] |
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| Concentration risk, percentage |
82.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueServicesNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
|
58.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueServicesNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
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| Raw materials | Supplier Concentration Risk | Vendor one |
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| Significant Accounting Policies [Line Items] |
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| Concentration risk, percentage |
20.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_CostOfGoodsTotalMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_SupplierConcentrationRiskMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ingn_VendorOneMember
|
19.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_CostOfGoodsTotalMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_SupplierConcentrationRiskMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ingn_VendorOneMember
|
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| Raw materials | Supplier Concentration Risk | Vendor two |
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| Significant Accounting Policies [Line Items] |
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| Concentration risk, percentage |
16.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_CostOfGoodsTotalMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_SupplierConcentrationRiskMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ingn_VendorTwoMember
|
18.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_CostOfGoodsTotalMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_SupplierConcentrationRiskMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ingn_VendorTwoMember
|
|
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| Raw materials | Supplier Concentration Risk | Vendor three |
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| Significant Accounting Policies [Line Items] |
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| Concentration risk, percentage |
11.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_CostOfGoodsTotalMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_SupplierConcentrationRiskMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ingn_VendorThreeMember
|
11.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_CostOfGoodsTotalMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_SupplierConcentrationRiskMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ingn_VendorThreeMember
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| Service Contracts |
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| Significant Accounting Policies [Line Items] |
|
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| 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.
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