Annual report pursuant to Section 13 and 15(d)

Statements of Stockholders' Equity (Deficit)

v2.4.1.9
Statements of Stockholders' Equity (Deficit) (USD $)
In Thousands, except Share data
Total
Series A convertible preferred stock
Series G Preferred Stock
Common stock
Additional paid-in capital
Accumulated deficit
Accumulated deficit
Series G Preferred Stock
Beginning Balance at Dec. 31, 2011 $ (75,566)us-gaap_StockholdersEquity $ 247us-gaap_StockholdersEquity
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
  $ 1us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
  $ (75,814)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
 
Beginning Balance, shares at Dec. 31, 2011   66,666us-gaap_SharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
  250,440us-gaap_SharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
     
Stock-based compensation 60us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue       60us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
   
Stock options exercised 3us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised       3us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
   
Stock options exercised, shares       4,270us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
     
Warrants exercised 5ingn_StockIssuedDuringPeriodValueStockWarrantsExercised       5ingn_StockIssuedDuringPeriodValueStockWarrantsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
   
Warrants exercised, shares       17,386ingn_StockIssuedDuringPeriodSharesStockWarrantsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
     
Accretion of Series G financing costs (55)ingn_StockIssuedDuringPeriodAccretionOfFinancingCosts           (55)ingn_StockIssuedDuringPeriodAccretionOfFinancingCosts
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesGPreferredStockMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
Deemed dividend on redeemable convertible preferred stock (5,781)ingn_DeemedDividendOnRedeemableConvertiblePreferredStock       (68)ingn_DeemedDividendOnRedeemableConvertiblePreferredStock
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
(5,713)ingn_DeemedDividendOnRedeemableConvertiblePreferredStock
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
 
Net income 564us-gaap_NetIncomeLoss         564us-gaap_NetIncomeLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
 
Ending Balance at Dec. 31, 2012 (80,770)us-gaap_StockholdersEquity 247us-gaap_StockholdersEquity
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
  1us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
  (81,018)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
 
Ending Balance, shares at Dec. 31, 2012   66,666us-gaap_SharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
  272,096us-gaap_SharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
     
Stock-based compensation 230us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue       230us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
   
Stock options exercised 10us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised       10us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
   
Stock options exercised, shares 8,874us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised     8,878us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
     
Warrants exercised 1ingn_StockIssuedDuringPeriodValueStockWarrantsExercised       1ingn_StockIssuedDuringPeriodValueStockWarrantsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
   
Deemed dividend on redeemable convertible preferred stock (7,278)ingn_DeemedDividendOnRedeemableConvertiblePreferredStock       (241)ingn_DeemedDividendOnRedeemableConvertiblePreferredStock
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
(7,037)ingn_DeemedDividendOnRedeemableConvertiblePreferredStock
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
 
Net income 25,435us-gaap_NetIncomeLoss         25,435us-gaap_NetIncomeLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
 
Ending Balance at Dec. 31, 2013 (62,372)us-gaap_StockholdersEquity 247us-gaap_StockholdersEquity
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
  1us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
  (62,620)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
 
Ending Balance, shares at Dec. 31, 2013   66,666us-gaap_SharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
  280,974us-gaap_SharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
     
Stock-based compensation 1,451us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue       1,363us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
88us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
 
Employee stock purchase 413us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan       413us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
   
Employee stock purchase, shares       30,358us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
     
Stock options exercised 946us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised     1us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
945us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
   
Stock options exercised, shares 736,519us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised     736,519us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
     
Warrants exercised 61ingn_StockIssuedDuringPeriodValueStockWarrantsExercised       61ingn_StockIssuedDuringPeriodValueStockWarrantsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
   
Warrants exercised, shares       222,455ingn_StockIssuedDuringPeriodSharesStockWarrantsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
     
Reclassification of warrant liability 76us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued       76us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
   
Deemed dividend on redeemable convertible preferred stock (987)ingn_DeemedDividendOnRedeemableConvertiblePreferredStock         (987)ingn_DeemedDividendOnRedeemableConvertiblePreferredStock
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
 
Conversion of preferred stock 120,251us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities (247)us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
28,427us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesGPreferredStockMember
14us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
120,484us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
   
Conversion of preferred stock, shares   (66,666)us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
2,840,260us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesGPreferredStockMember
14,259,647us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
     
Issuance of common stock in connection with initial public offering 49,844us-gaap_StockIssuedDuringPeriodValueNewIssues     3us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
49,841us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
   
Issuance of common stock in connection with initial public offering, shares       3,529,411us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
     
Excess tax benefits from stock-based compensation arrangements 1,641us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation       1,641us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
   
Net income 6,826us-gaap_NetIncomeLoss         6,826us-gaap_NetIncomeLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
 
Ending Balance at Dec. 31, 2014 $ 118,150us-gaap_StockholdersEquity     $ 19us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
$ 174,824us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
$ (56,693)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
 
Ending Balance, shares at Dec. 31, 2014       19,059,364us-gaap_SharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember