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COMMON STOCK, PREFERRED STOCK AND WARRANTS WITH-DOWN ROUND PROTECTION (Offering) (Details) (USD $) | 5 Months Ended | 12 Months Ended | 0 Months Ended
--- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2013 | May 14, 2013 | May 13, 2013 | Mar. 13, 2013 | Nov. 19, 2012
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |
Proceeds from convertible preferred stock and warrants | $ 7,300,000 us-gaap_ProceedsFromRepurchaseOfRedeemablePreferredStock |  | $ 5,300,000 us-gaap_ProceedsFromRepurchaseOfRedeemablePreferredStock |  |  |  |  |  |
Stock price at which stock dividend is declared | $ 5.80 igap_StockPriceAtWhichStockDividendIsDeclared | $ 5.80 igap_StockPriceAtWhichStockDividendIsDeclared |  |  |  |  |  |  |
Stock dividend |  |  |  |  |  |  |  |  |
Non-cash compensation expense |  | 630,936 us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims |  |  |  |  |  |  |
Common Stock [Member] |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |
Stock dividend |  | (1)us-gaap_DividendsStock / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |
Stock issued, shares |  |  |  | 165,057 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |
Retained Earnings [Member] |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |
Stock dividend |  |  | 278,263 us-gaap_DividendsStock / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  | 278,263 us-gaap_DividendsStock / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |  |  |
Scenario, Plan [Member] |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |
Shares convertible into |  |  |  |  |  | 1,284,925 igap_ConvertiblePreferredStockAggregateNumberOfSharesIssueduponConversion / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPlanMember |  |  |
Number of shares covered by warrants |  |  |  |  |  | 1,539,546 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPlanMember |  |  |
Stock issued, shares |  |  |  |  |  | 2,824,471 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPlanMember |  |  |
2012 Offering [Member] |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |
Shares sold |  |  |  |  |  |  |  |  | 165,057 us-gaap_StockIssuedDuringPeriodSharesIssuedForCash / us-gaap_RegistrationPaymentArrangementByArrangementAxis = igap_TwoThousandTwelveOfferingMember
Common stock issued, price per share |  |  |  |  |  |  |  |  | $ 7.00 us-gaap_EquityIssuancePerShareAmount / us-gaap_RegistrationPaymentArrangementByArrangementAxis = igap_TwoThousandTwelveOfferingMember
Amount of issuance |  |  |  |  |  |  |  |  | 1,155,399 us-gaap_StockIssuedDuringPeriodValueIssuedForCash / us-gaap_RegistrationPaymentArrangementByArrangementAxis = igap_TwoThousandTwelveOfferingMember
Number of shares offered |  |  |  |  |  |  |  |  | 785,714 igap_NumberOfSharesOffered / us-gaap_RegistrationPaymentArrangementByArrangementAxis = igap_TwoThousandTwelveOfferingMember
Number of units sold |  |  |  |  |  |  | 1,140.35 igap_NumberOfUnitsSold / us-gaap_RegistrationPaymentArrangementByArrangementAxis = igap_TwoThousandTwelveOfferingMember | 6,300 igap_NumberOfUnitsSold / us-gaap_RegistrationPaymentArrangementByArrangementAxis = igap_TwoThousandTwelveOfferingMember |
Proceeds from convertible preferred stock and warrants |  | 5,400,000 us-gaap_ProceedsFromRepurchaseOfRedeemablePreferredStock / us-gaap_RegistrationPaymentArrangementByArrangementAxis = igap_TwoThousandTwelveOfferingMember |  |  |  |  |  |  |
Cancellation of shares, shares |  |  |  |  |  |  | 162,907 us-gaap_StockRepurchasedAndRetiredDuringPeriodShares / us-gaap_RegistrationPaymentArrangementByArrangementAxis = igap_TwoThousandTwelveOfferingMember |  |
Value of temporary equity reclassified |  |  |  |  |  |  | 1,140,349 us-gaap_TemporaryEquityOtherChanges / us-gaap_RegistrationPaymentArrangementByArrangementAxis = igap_TwoThousandTwelveOfferingMember |  |
Total issuance costs |  |  |  | 1,479,864 igap_OfferingCostsIncurred / us-gaap_RegistrationPaymentArrangementByArrangementAxis = igap_TwoThousandTwelveOfferingMember |  |  |  |  |
Non-cash compensation expense |  |  |  | 562,805 us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims / us-gaap_RegistrationPaymentArrangementByArrangementAxis = igap_TwoThousandTwelveOfferingMember |  |  |  |  |
2012 Offering [Member] | Common Stock [Member] |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |
Stock dividend, shares |  | 100,526 us-gaap_StockDividendsShares / us-gaap_RegistrationPaymentArrangementByArrangementAxis = igap_TwoThousandTwelveOfferingMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |
2012 Offering [Member] | Scenario, Plan [Member] |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |
Stock issued, shares |  |  |  |  |  |  | 1,295,535 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_RegistrationPaymentArrangementByArrangementAxis = igap_TwoThousandTwelveOfferingMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPlanMember |  |
2014 Offering [Member] |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |
Gross proceeds from issuance of Units | 8,500,000 igap_ProceedsFromUnitsSold / us-gaap_RegistrationPaymentArrangementByArrangementAxis = igap_TwoThousandFourteenOfferingMember |  |  |  |  |  |  |  |
Number of units sold | 8,500 igap_NumberOfUnitsSold / us-gaap_RegistrationPaymentArrangementByArrangementAxis = igap_TwoThousandFourteenOfferingMember |  |  |  |  |  |  |  |
Warrants term | 5 years |  |  |  |  |  |  |  |
Proceeds from convertible preferred stock and warrants | 7,300,000 us-gaap_ProceedsFromRepurchaseOfRedeemablePreferredStock / us-gaap_RegistrationPaymentArrangementByArrangementAxis = igap_TwoThousandFourteenOfferingMember |  |  |  |  |  |  |  |
Total issuance costs |  | 1,787,545 igap_OfferingCostsIncurred / us-gaap_RegistrationPaymentArrangementByArrangementAxis = igap_TwoThousandFourteenOfferingMember |  |  |  |  |  |  |
Non-cash compensation expense |  | $ 630,936 us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims / us-gaap_RegistrationPaymentArrangementByArrangementAxis = igap_TwoThousandFourteenOfferingMember |  |  |  |  |  |  |
Series A warrants Issued under Securities Purchase Agreement [Member] |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |
Number of shares covered by warrants | 1,086,178 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_ClassOfWarrantOrRightAxis = igap_WarrantsIssuedUnderSecuritiesPurchaseAgreementMember | 1,086,178 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_ClassOfWarrantOrRightAxis = igap_WarrantsIssuedUnderSecuritiesPurchaseAgreementMember |  |  |  |  |  |  |
Warrant exercise price | $ 6.96 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_ClassOfWarrantOrRightAxis = igap_WarrantsIssuedUnderSecuritiesPurchaseAgreementMember | $ 6.96 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_ClassOfWarrantOrRightAxis = igap_WarrantsIssuedUnderSecuritiesPurchaseAgreementMember |  |  |  |  |  |  |
Warrants Issued under Second Closing of Securities Purchase Agreement [Member] |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |
Number of shares covered by warrants | 196,597 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_ClassOfWarrantOrRightAxis = igap_WarrantsIssuedUnderSecondClosingOfSecuritiesPurchaseAgreementMember | 196,597 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_ClassOfWarrantOrRightAxis = igap_WarrantsIssuedUnderSecondClosingOfSecuritiesPurchaseAgreementMember |  |  |  |  |  |  |
Series B-1 Warrant [Member] |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |
Warrants term |  | 5 years |  |  |  |  |  |  |
Warrant exercise price | $ 5.80 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_ClassOfWarrantOrRightAxis = igap_SeriesB1WarrantMember | $ 5.80 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_ClassOfWarrantOrRightAxis = igap_SeriesB1WarrantMember |  |  |  |  |  |  |
Series B-2 Warrant [Member] |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |
Warrants term |  | 5 years |  |  |  |  |  |  |
Warrant exercise price | $ 10.00 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_ClassOfWarrantOrRightAxis = igap_SeriesB2WarrantMember | $ 10.00 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_ClassOfWarrantOrRightAxis = igap_SeriesB2WarrantMember |  |  |  |  |  |  |
Series A Preferred Stock [Member] | 2012 Offering [Member] |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |
Preferred stock conversion price |  |  |  |  |  |  |  | 5.80 igap_ConvertiblePreferredStockConversionPrice / us-gaap_RegistrationPaymentArrangementByArrangementAxis = igap_TwoThousandTwelveOfferingMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |
Shares convertible into |  |  |  |  |  |  | 196,597 igap_ConvertiblePreferredStockAggregateNumberOfSharesIssueduponConversion / us-gaap_RegistrationPaymentArrangementByArrangementAxis = igap_TwoThousandTwelveOfferingMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember | 1,086,178 igap_ConvertiblePreferredStockAggregateNumberOfSharesIssueduponConversion / us-gaap_RegistrationPaymentArrangementByArrangementAxis = igap_TwoThousandTwelveOfferingMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |

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