Inogen, Inc. Annual report [Section 13 and 15(d), not S-K Item 405]

Annual report [Section 13 and 15(d), not S-K Item 405]

Stockholders' Equity - Additional Information (Details)

Stockholders' Equity - Additional Information (Details)		12 Months Ended
Stockholders' Equity - Additional Information (Details)	Jan. 25, 2025 USD ($) $ / shares shares	Dec. 31, 2025 USD ($) Vote $ / shares shares	Dec. 31, 2024 USD ($) $ / shares shares	Dec. 31, 2023 USD ($) $ / shares shares	Jun. 07, 2024 shares	Dec. 31, 2022 shares
Class Of Stock [Line Items]
Number of voting rights per share of common stock \| Vote		1
Preferred stock, shares authorized		10,000,000
Preferred stock, shares issued		0	0
Preferred stock, shares outstanding		0	0
Dividends declared \| $		$ 0	$ 0	$ 0
Common stock outstanding				20,000		348,284
Total intrinsic value of options exercised \| $			$ 0	$ 735,000
Monte Carlo Simulation Model
Class Of Stock [Line Items]
Weighted-average grant date fair value per share, Granted \| $ / shares		$ 12.59	$ 6.94
Securities Purchase Agreement
Class Of Stock [Line Items]
Number of shares to purchase	2,626,425
Price per share \| $ / shares	$ 10.36
Aggregate purchase price \| $	$ 27,210,000
Time based restricted stock units
Class Of Stock [Line Items]
Vesting period		4 years
Performance Based Awards
Class Of Stock [Line Items]
Vesting period		3 years
Time based restricted stock awards
Class Of Stock [Line Items]
Vesting period		4 years
Performance and time based restricted stock awards
Class Of Stock [Line Items]
Vesting period		3 years
Performance and time based restricted stock units
Class Of Stock [Line Items]
Vesting period		3 years
Restricted stock units and restricted stock awards
Class Of Stock [Line Items]
Rate of reduced stock-based compensation expense for estimated forfeiture		10.30%	8.30%	5.30%
Restricted stock units
Class Of Stock [Line Items]
Amount expected to recognized over weighted-average period		1 year 10 months 24 days
Unrecognized compensation cost related to unvested employee excluding estimated forfeitures \| $		$ 9,515,000
Weighted-average grant date fair value per share, Granted \| $ / shares		$ 9.11	$ 7.28	$ 12.29
Maximum \| Stock Option Plan Awards
Class Of Stock [Line Items]
Stock option period, expiration		10 years
Vesting period		4 years
Maximum \| Performance Based Awards
Class Of Stock [Line Items]
Percentage payout for performance-based equity awards		200.00%
Minimum \| Stock Option Plan Awards
Class Of Stock [Line Items]
Stock option period, expiration		7 years
Vesting period		1 year
Minimum \| Performance Based Awards
Class Of Stock [Line Items]
Percentage payout for performance-based equity awards		0.00%
2014 Plan \| Restricted stock units and restricted stock awards
Class Of Stock [Line Items]
Stock option shares outstanding		103,377
2014 ESPP Plan
Class Of Stock [Line Items]
Number of equity awards available for grant		624,415
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%
2023 Plan
Class Of Stock [Line Items]
Stock option shares outstanding		2,443,316
Number of equity awards available for grant		1,582,310
Issued shares of common stock to certain new hire issuable upon			225,000
Number of shares common stock reserved for issuance					1,600,000
2023 Plan \| Shares Reserved but not Issued and Granted under 2014 Plan
Class Of Stock [Line Items]
Number of shares common stock reserved for issuance					2,027,790
2023 Plan \| Inducement Grant
Class Of Stock [Line Items]
Common stock outstanding		125,000
2023 Plan \| Maximum \| Awards Granted under 2014 Plan and 2012 Plan
Class Of Stock [Line Items]
Number of shares common stock reserved for issuance					2,950,000
2023 Plan \| Maximum \| Time based restricted stock units
Class Of Stock [Line Items]
Vesting shares			75,000
2023 Plan \| Maximum \| Performance-based restricted stock units
Class Of Stock [Line Items]
Vesting shares			150,000