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

Balance Sheet Components - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	$ 6,296	$ 6,338
Accumulated amortization	2,203	1,621
Net amount	$ 4,093	$ 4,717
Licenses
Finite Lived Intangible Assets [Line Items]
Average estimated useful lives (in years)	10 years	10 years
Gross carrying amount	$ 185	$ 185
Accumulated amortization	146	137
Net amount	$ 39	$ 48
Patents And Websites
Finite Lived Intangible Assets [Line Items]
Average estimated useful lives (in years)	5 years	5 years
Gross carrying amount	$ 4,173	$ 4,173
Accumulated amortization	1,304	959
Net amount	$ 2,869	$ 3,214
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Average estimated useful lives (in years)	4 years	4 years
Gross carrying amount	$ 1,402	$ 1,437
Accumulated amortization	409	240
Net amount	$ 993	$ 1,197
Non-Compete Agreement
Finite Lived Intangible Assets [Line Items]
Average estimated useful lives (in years)	2 years 3 months 18 days	3 years
Gross carrying amount	$ 233	$ 240
Accumulated amortization	91	52
Net amount	142	188
Commercials
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	303	303
Accumulated amortization	253	233
Net amount	$ 50	$ 70
Commercials \| Minimum
Finite Lived Intangible Assets [Line Items]
Average estimated useful lives (in years)	2 years	2 years
Commercials \| Maximum
Finite Lived Intangible Assets [Line Items]
Average estimated useful lives (in years)	3 years	3 years