| Document And Entity Information | Jan. 30, 2025 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jan. 30, 2025 |
| Entity Registrant Name | Inogen Inc |
| Entity Central Index Key | 0001294133 |
| Entity Emerging Growth Company | false |
| Entity File Number | 001-36309 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 33-0989359 |
| Entity Address, Address Line One | 859 Ward Drive |
| Entity Address, City or Town | Goleta |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 93111 |
| City Area Code | (805) |
| Local Phone Number | 562-0500 |
| Entity Information, Former Legal or Registered Name | Not Applicable |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.001 par value |
| Trading Symbol | INGN |
| Security Exchange Name | NASDAQ |
