Inogen, Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Additional Information (Details)

Summary of Significant Accounting Policies - Additional Information (Details) (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended	3 Months Ended		9 Months Ended						9 Months Ended	0 Months Ended				3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended			12 Months Ended	9 Months Ended
	Nov. 11, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Segment Product	Sep. 30, 2013	Mar. 07, 2014	Feb. 20, 2014	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2014 Common Stock	Feb. 20, 2014 Inogen, Inc.	Feb. 20, 2014 Stockholders	Sep. 30, 2014 Accounts Receivable	Dec. 31, 2013 Accounts Receivable	Sep. 30, 2014 Customer Concentration Risk Medicare Service Reimbursement Programs Compared to Rental Revenue	Sep. 30, 2013 Customer Concentration Risk Medicare Service Reimbursement Programs Compared to Rental Revenue	Sep. 30, 2014 Customer Concentration Risk Medicare Service Reimbursement Programs Compared to Rental Revenue	Sep. 30, 2013 Customer Concentration Risk Medicare Service Reimbursement Programs Compared to Rental Revenue	Sep. 30, 2014 Customer Concentration Risk Medicare Service Reimbursement Programs Compared to Total Revenue	Sep. 30, 2013 Customer Concentration Risk Medicare Service Reimbursement Programs Compared to Total Revenue	Sep. 30, 2014 Customer Concentration Risk Medicare Service Reimbursement Programs Compared to Total Revenue	Sep. 30, 2013 Customer Concentration Risk Medicare Service Reimbursement Programs Compared to Total Revenue	Sep. 30, 2014 Credit Concentration Risk Medicare Service Reimbursement Programs Compared to Total Accounts Receivable	Dec. 31, 2013 Credit Concentration Risk Medicare Service Reimbursement Programs Compared to Total Accounts Receivable	Sep. 30, 2014 vendor one raw materials	Sep. 30, 2013 vendor one raw materials	Sep. 30, 2014 vendor one Vendor Two	Sep. 30, 2013 vendor one Vendor Two	Sep. 30, 2014 vendor one Vendor Three	Sep. 30, 2013 vendor one Vendor Three	Sep. 30, 2014 Maximum Customer Concentration Risk Total revenue Single Customer	Sep. 30, 2013 Maximum Customer Concentration Risk Total revenue Single Customer	Sep. 30, 2014 Service Contracts
Significant Accounting Policies [Line Items]
Extended service contracts				Lifetime of the patient																													12 to 24 months
Accrual of product warranty liability		$ 1,172		$ 1,172				$ 809	$ 447
Number of deliverables qualifying as separate units				2
Deliverable standard warranty, period				3 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.
Rental revenue earned				30-day period
Unbilled Receivables		3,410		3,410				1,435
Concentration risk, percentage															78.60%	70.80%	74.30%	73.10%	26.70%	27.40%	25.60%	28.80%	20.30%	25.00%	18.80%	15.70%	17.80%	14.90%	8.00%	8.60%	10.00%	10.00%
Accounts Receivable Net Current		18,061		18,061				10,231					3,661	2,560
Cost Of Property Repairs And Maintenance		367	251	1,157	707
Property Plant And Equipment Salvage Value		$ 0		$ 0
Number Of Operating Segments				1
Reverse stock split ratio	3:1
Effective date of reverse stock split				Nov. 12, 2013
Common stock, par value		$ 0.001		$ 0.001			$ 16.00	$ 0.001
Common stock, shares issued		18,436,802		18,436,802			4,411,763	280,974
Number of shares sold											3,529,411	882,352
Common stock purchased by underwriters						99,550
Conversion of preferred stock, shares										14,259,647