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Summary of Significant Accounting Policies - Additional Information (Details) | 12 Months Ended
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Dec. 31, 2021 USD ($) Customer Segment | Dec. 31, 2020 USD ($) Customer | Dec. 31, 2019 USD ($) Customer
Significant Accounting Policies [Line Items] |  |  |
Standard warranty period offered | 3 years |  |
Cash payments received in advance of satisfying performance obligations | $ 6,764,000 | $ 5,258,000 |
Performance obligation partially offset of revenue recognized |  | 5,866,000 | $ 5,908,000
Deferred capped rental revenue | $ 0 | 0 |
Rental revenue earned | 30 days |  |
Product warranty description | The Company generally provides a warranty against defects in material and workmanship. The Company provides a 3-year, 5-year or lifetime warranty on Inogen One systems sold and a 3-year and lifetime warranty on Inogen At Home systems sold. The Tidal Assist® Ventilator (TAV®) system has a 1-year and a 3-year warranty. The Company also offers a lifetime warranty for direct-to-consumer sales of its oxygen concentrators. |  |
Accounts receivable, net | $ 24,452,000 | 29,717,000 |
Preacquisition loss recoveries | 630,000 | 672,000 |
Increase in net rental revenue related to prior years | $ 877,000 | $ 575,000 |
Percentage of Non-US revenue invoiced in Euros | 74.10% | 73.60% | 70.20%
Transfer of inventory to rental equipment | $ 906,000 | $ 1,970,000 | $ 1,043,000
Salvage value of expenditures for additions, improvements and replacements | 0 |  |
Repairs and maintenance expense | 3,387,000 | 2,527,000 | 2,854,000
Depreciation and amortization | 12,853,000 | 9,577,000 | 9,674,000
Impairments of long-lived assets | 0 | 0 |
Goodwill impairment loss | 0 | 0 |
Advertising costs | 35,183,000 | 34,180,000 | 40,251,000
Other income (expense) | (710,000) | 5,836,000 | (229,000)
General and administrative | $ 37,852,000 | 38,605,000 | 37,121,000
Number of operating segments | Segment | 1 |  |
Number of reportable segments | Segment | 1 |  |
ASU 2019-12 |  |  |
Significant Accounting Policies [Line Items] |  |  |
Change in accounting principle, accounting standards update, adopted | true |  |
Change in accounting principle, accounting standards update, adoption date | Jan. 01, 2021 |  |
Change in accounting principle, accounting standards update, immaterial effect | true |  |
CARES Act |  |  |
Significant Accounting Policies [Line Items] |  |  |
Grant amount received |  | 6,200,000 |
Other income (expense) |  | 5,300,000 |
General and administrative |  | 900,000 |
Construction in Process and Computer Software or Development Cost |  |  |
Significant Accounting Policies [Line Items] |  |  |
Depreciation and amortization | $ 0 | 0 | $ 0
Other Noncurrent Assets |  |  |
Significant Accounting Policies [Line Items] |  |  |
Noncurrent inventories expected to be realized or consumed | 1,943,000 | 1,153,000 |
Prepaid Expenses And Other Current Assets |  |  |
Significant Accounting Policies [Line Items] |  |  |
Inventory raw materials | 15,426,000 |  |
Customer Concentration Risk | Customer One |  |  |
Significant Accounting Policies [Line Items] |  |  |
Accounts receivable, net | $ 5,945,000 | 8,417,000 |
Customer Concentration Risk | Customer Two |  |  |
Significant Accounting Policies [Line Items] |  |  |
Accounts receivable, net |  | $ 7,044,000 |
Sales Revenue, Net | Customer Concentration Risk |  |  |
Significant Accounting Policies [Line Items] |  |  |
Number of customers | Customer |  | 1 | 0
Net Accounts Receivable | Customer Concentration Risk |  |  |
Significant Accounting Policies [Line Items] |  |  |
Number of customers | Customer | 1 | 2 |
Raw materials | Supplier Concentration Risk | Vendor one |  |  |
Significant Accounting Policies [Line Items] |  |  |
Concentration Risk, Percentage | 16.30% | 20.70% |
Raw materials | Supplier Concentration Risk | Vendor two |  |  |
Significant Accounting Policies [Line Items] |  |  |
Concentration Risk, Percentage | 12.10% | 11.70% |
Raw materials | Supplier Concentration Risk | Vendor three |  |  |
Significant Accounting Policies [Line Items] |  |  |
Concentration Risk, Percentage | 9.90% | 9.30% |
Fair Value Measurements Recurring | Level 3 | Maximum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Earnout Liability | $ 31,400,000 |  |
Forward Contracts |  |  |
Significant Accounting Policies [Line Items] |  |  |
Accounts receivable, net | 1,671,000 |  |
Related payable |  | $ 863,000 |
Lifetime Warranties | Direct-to-Consumer |  |  |
Significant Accounting Policies [Line Items] |  |  |
Deferred revenue |  | 17,976,000 | $ 17,078,000
Medicare's Service Reimbursement Programs | Customer Concentration Risk |  |  |
Significant Accounting Policies [Line Items] |  |  |
Accounts receivable, net | $ 2,685,000 | $ 1,882,000 |
Medicare's Service Reimbursement Programs | Sales Revenue, Net | Customer Concentration Risk |  |  |
Significant Accounting Policies [Line Items] |  |  |
Concentration Risk, Percentage | 10.60% | 7.50% | 4.80%
Medicare's Service Reimbursement Programs | Net Accounts Receivable | Customer Concentration Risk |  |  |
Significant Accounting Policies [Line Items] |  |  |
Concentration Risk, Percentage | 11.00% | 6.30% |
Medicare's Service Reimbursement Programs | Rental Revenue | Customer Concentration Risk |  |  |
Significant Accounting Policies [Line Items] |  |  |
Concentration Risk, Percentage | 81.90% | 81.50% | 81.10%

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