Quarterly report pursuant to Section 13 or 15(d)

General - Additional Information (Details)

v2.4.0.8
General - Additional Information (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
0 Months Ended 9 Months Ended 0 Months Ended
Sep. 30, 2014
Dec. 31, 2013
Feb. 20, 2014
Inogen, Inc.
Feb. 20, 2014
Stockholders
Feb. 20, 2014
Initial Public Offering (IPO)
Sep. 30, 2014
Initial Public Offering (IPO)
Feb. 20, 2014
Initial Public Offering (IPO)
Inogen, Inc.
Feb. 20, 2014
Initial Public Offering (IPO)
Stockholders
General Disclosures [Line Items]                
Number of shares sold     3,529,411 882,352 4,511,313   3,529,411 981,902
Common stock, par value         $ 16.00      
Amount after underwriters discount and other associated expenses           $ 49,668    
Common stock, shares outstanding 18,436,802 280,974       18,436,802