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

Annual report pursuant to Section 13 and 15(d)

Stock Incentive Plan - Summary of Stock Options Activity (Details)

Stock Incentive Plan - Summary of Stock Options Activity (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock Options Outstanding, Beginning balance	2,328,675	1,646,223
Stock Options, Granted	754,916	716,326
Stock Options, Exercised	(736,519)	(8,874)
Stock Options, Forfeited	(80,640)	(23,106)
Stock Options, Expired	(4,799)	(1,894)
Stock Options Outstanding, Ending balance	2,261,633	2,328,675	1,646,223
Stock Options, Vested and exercisable	1,100,539	1,524,325
Stock Options, Vested and expected to vest	2,144,974	2,226,738
Outstanding, Weighted average exercise price, Beginning balance	$ 1.94	$ 1.06
Weighted average exercise price, Granted	$ 17.81	$ 3.95
Weighted average exercise price, Exercised	$ 1.28	$ 1.35
Weighted average exercise price, Forfeited	$ 5.81	$ 2.46
Weighted average exercise price, Expired	$ 1.09	$ 1.53
Outstanding, Weighted average exercise price, Ending balance	$ 7.31	$ 1.94	$ 1.06
Weighted average exercise price, Vested and exercisable	$ 2.02	$ 1.16
Weighted average exercise price, Vested and expected to vest	$ 7.19	$ 1.88
Remaining weighted average contractual term, Outstanding	6 years 5 months 5 days	7 years 15 days	6 years 11 months 27 days
Remaining weighted average contractual term, Vested and exercisable	5 years 8 months 23 days	5 years 11 months 12 days
Remaining weighted average contractual term, Vested and expected to vest	6 years 4 months 17 days	6 years 11 months 12 days
Outstanding, Per share average intrinsic value	$ 24.06	$ 10.23	$ 0.41
Per share average intrinsic value, Vested and exercisable	$ 29.35	$ 11.01
Per share average intrinsic value, Vested and expected to vest	$ 24.18	$ 10.29
Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Outstanding, Price per share, Beginning balance	$ 0.60	$ 0.60
Price per share, Granted	$ 16.62	$ 1.17
Price per share, Exercised	$ 0.60	$ 0.60
Price per share, Forfeited	$ 0.60	$ 0.60
Price per share, Expired	$ 0.60	$ 0.60
Outstanding, Price per share, Ending balance	$ 0.60	$ 0.60
Price per share, Vested and exercisable	$ 0.60	$ 0.60
Price per share, Vested and expected to vest	$ 0.60	$ 0.60
Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Outstanding, Price per share, Beginning balance	$ 8.70	$ 8.70
Price per share, Granted	$ 24.52	$ 8.37
Price per share, Exercised	$ 16.62	$ 8.70
Price per share, Forfeited	$ 16.62	$ 8.37
Price per share, Expired	$ 8.37	$ 8.70
Outstanding, Price per share, Ending balance	$ 24.52	$ 8.70
Price per share, Vested and exercisable	$ 18.93	$ 8.70
Price per share, Vested and expected to vest	$ 24.52	$ 8.70