Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Additional Information (Details)

v3.20.4
Summary of Significant Accounting Policies - Additional Information (Details)
 12 Months Ended
Dec. 31, 2020
USD ($)
Customer
Segment
Dec. 31, 2019
USD ($)
Customer
Dec. 31, 2018
USD ($)
Customer
Significant Accounting Policies [Line Items]      
Standard warranty period offered 3 years    
Cash payments received in advance of satisfying performance obligations $ 5,258,000 $ 8,757,000  
Performance obligation partially offset of revenue recognized 5,908,000 5,903,000  
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 $ 29,717,000 34,325,000  
Preacquisition loss recoveries 672,000 0  
Unbilled Receivables 459,000 590,000  
Increase in provision for bad debt and revenue adjustments related to prior years $ 575,000 $ 611,000  
Percentage of Non-US revenue invoiced in Euros 73.60% 70.20%  
Transfer of inventory to rental equipment $ 1,970,000 $ 1,043,000 $ 1,187,000
Salvage value of expenditures for additions, improvements and replacements 0    
Repairs and maintenance expense 2,527,000 2,854,000 2,289,000
Depreciation and amortization 9,577,000 9,674,000 10,030,000
Impairments of long-lived assets 0 0  
Goodwill impairment loss 0 0  
Advertising costs 34,180,000 40,251,000 30,755,000
Other income (expense) 5,836,000 (229,000) (696,000)
General and administrative $ 38,605,000 37,121,000 38,018,000
Number of operating segments | Segment 1    
Number of reportable segments | Segment 1    
ASU 2016-13      
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, 2020    
Change in accounting principle, accounting standards update, immaterial effect true    
ASU 2018-13      
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, 2020    
Change in accounting principle, accounting standards update, immaterial effect true    
ASU 2017-04      
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, 2020    
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 1,153,000 1,076,000  
Customer Concentration Risk | Customer One      
Significant Accounting Policies [Line Items]      
Accounts receivable, net 8,417,000 10,695,000  
Customer Concentration Risk | Customer Two      
Significant Accounting Policies [Line Items]      
Accounts receivable, net $ 7,044,000 $ 5,228,000  
Sales Revenue, Net | Customer Concentration Risk      
Significant Accounting Policies [Line Items]      
Number of customers | Customer 1 0 1
Net Accounts Receivable | Customer Concentration Risk      
Significant Accounting Policies [Line Items]      
Number of customers | Customer 2 2  
Raw materials | Supplier Concentration Risk | Vendor one      
Significant Accounting Policies [Line Items]      
Concentration risk, percentage 20.70% 23.20%  
Raw materials | Supplier Concentration Risk | Vendor two      
Significant Accounting Policies [Line Items]      
Concentration risk, percentage 11.70% 13.90%  
Raw materials | Supplier Concentration Risk | Vendor three      
Significant Accounting Policies [Line Items]      
Concentration risk, percentage 9.30% 9.40%  
Fair Value Measurements Recurring | Level 3 | Maximum      
Significant Accounting Policies [Line Items]      
Earnout Liability $ 31,400,000    
Forward Contracts      
Significant Accounting Policies [Line Items]      
Payable 863,000 $ 514,000  
Lifetime Warranties | Direct-to-Consumer      
Significant Accounting Policies [Line Items]      
Sales revenue $ 17,078,000 $ 17,728,000