Inogen, Inc. Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Summary of Stock-based Compensation Expense Recognized in Income Statement (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Class Of Stock [Line Items]
Stock-based compensation expense	$ 9,129	$ 12,790	$ 9,640
Cost of Revenue
Class Of Stock [Line Items]
Stock-based compensation expense	890	1,060	845
Research and Development
Class Of Stock [Line Items]
Stock-based compensation expense	1,100	1,314	1,015
Sales and Marketing
Class Of Stock [Line Items]
Stock-based compensation expense	1,755	2,355	1,558
General and Administrative
Class Of Stock [Line Items]
Stock-based compensation expense	$ 5,384	$ 8,061	$ 6,222