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

Stockholders' Equity - Summary of Stock-based Compensation Expense Recognized in Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Class Of Stock [Line Items]
Stock-based compensation expense	$ 2,523	$ 1,953	$ 6,630	$ 5,404
Cost of Revenue
Class Of Stock [Line Items]
Stock-based compensation expense	205	175	608	454
Research and Development
Class Of Stock [Line Items]
Stock-based compensation expense	260	223	733	561
Sales and Marketing
Class Of Stock [Line Items]
Stock-based compensation expense	407	318	1,069	859
General and Administrative
Class Of Stock [Line Items]
Stock-based compensation expense	$ 1,651	$ 1,237	$ 4,220	$ 3,530