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Warrants - Additional Information (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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| Equity [Abstract] | |||
| Fair value of preferred warrant liability | $ 0ingn_PreferredStockWarrantLiability | $ 260ingn_PreferredStockWarrantLiability | |
| Change in fair value of preferred warrants liability | $ 36us-gaap_FairValueAdjustmentOfWarrants | $ (262)us-gaap_FairValueAdjustmentOfWarrants | $ 148us-gaap_FairValueAdjustmentOfWarrants |
| X | ||||||||||
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- Definition
Preferred stock warrant liability. No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Amount of expense (income) related to adjustment to fair value of warrant liability. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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