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, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Class Of Stock [Line Items]
Stock-based compensation expense	$ 1,565	$ 3,216	$ 6,930	$ 9,783
Cost of Revenue
Class Of Stock [Line Items]
Stock-based compensation expense	172	187	656	719
Research and Development
Class Of Stock [Line Items]
Stock-based compensation expense	221	348	825	1,010
Sales and Marketing
Class Of Stock [Line Items]
Stock-based compensation expense	263	630	1,289	1,761
General and Administrative
Class Of Stock [Line Items]
Stock-based compensation expense	$ 909	$ 2,051	$ 4,160	$ 6,293