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

Fair Value of Financial Instruments - Summary of Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	$ 227,041	$ 182,088
Other comprehensive gain (loss)	12	61
Ending Balance	246,337	192,775
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	363
Other comprehensive gain (loss)	108
Ending Balance	471
Unrealized Losses on Available-for-sale Investments
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(17)
Other comprehensive gain (loss)	(19)
Ending Balance	(36)
Unrealized Losses on Cash Flow Hedges
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(74)
Other comprehensive gain (loss)	(77)
Ending Balance	(151)
Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	272	(35)
Other comprehensive gain (loss)	12	61
Ending Balance	$ 284	$ 26