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

Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Additional Information (Details)

Stockholders' Equity - Additional Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Class Of Stock [Line Items]
Rate of reduced stock-based compensation expense for estimated forfeiture	7.30%	7.50%
Share-based compensation, unrecognized expense, nonvested granted awards	$ 17,607	$ 11,579
Maximum
Class Of Stock [Line Items]
Stock option period, expiration	10 years
Stock option period, vested	4 years
Minimum
Class Of Stock [Line Items]
Stock option period, expiration	7 years
Stock option period, vested	1 year
2012 Plan
Class Of Stock [Line Items]
Stock option shares outstanding	461,821
Number of equity awards available for grant	0
2002 Plan
Class Of Stock [Line Items]
Stock option shares outstanding	161,657
Number of equity awards available for grant	0
2014 Plan
Class Of Stock [Line Items]
Stock option shares outstanding	1,875,277
Number of equity awards available for grant	436,549
Terms of shares available for issuance	The number of shares available for issuance under the 2014 Plan also includes an annual increase on the first day of each fiscal year beginning in 2015, equal to the least of: 895,346 shares; 4% of the outstanding shares of common stock as of the last day of our immediately preceding fiscal year; or such other amount as our board of directors may determine.
Common stock capital shares reserved for future issuance maximum annual increase	895,346
Percentage on outstanding shares of common stock	4.00%
Number of additional number of shares reserve to provision	791,296
2012 Plan and 2002 Plan \| Maximum
Class Of Stock [Line Items]
Stock option shares outstanding	2,328,569
2014 ESPP Plan
Class Of Stock [Line Items]
Number of equity awards available for grant	438,365
Terms of shares available for issuance	The number of shares available for issuance under the 2014 ESPP Plan also includes an annual increase on the first day of each fiscal year beginning in 2015, equal to least of: 179,069 shares;1.5% of the outstanding shares of our common stock on the last day of our immediately preceding fiscal year; or Such other amount as may be determined by the administrator
Percentage on outstanding shares of common stock	1.50%
Number of additional number of shares reserve to provision	179,069
Maximum percentage of common stock eligible to purchase through payroll deductions for participants	15.00%
Maximum number of shares available for participant to purchase during period	1,500
Potential increase of shares available for issuance	179,069
Purchase price as percentage of stock price on offering period	85.00%
Purchase price as percentage of stock price on exercise date	85.00%