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v3.20.4

Summary of Significant Accounting Policies - Summary of Property Plant and Equipment and Rental Equipment with Associated Accumulated Depreciation (Parenthetical) (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Property Plant And Equipment [Abstract] |  |
Rental equipment, allowance | $ 575 | $ 395

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- Definition Rental equipment allowance. + References No definition available. + Details
Name: | ingn_RentalEquipmentAllowance
Namespace Prefix: | ingn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration