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Convertible Note Agreements (Details) (USD $)
3 Months Ended 9 Months Ended 1 Months Ended 0 Months Ended 1 Months Ended 0 Months Ended 2 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2015
Mar. 31, 2014
Jul. 31, 2014
Feb. 12, 2015
Feb. 01, 2013
Feb. 28, 2015
Jul. 11, 2013
Mar. 31, 2015
item
Debt Conversion [Line Items]                    
Loss on extinguishment of debt $ 596,648us-gaap_GainsLossesOnExtinguishmentOfDebt    $ 596,648us-gaap_GainsLossesOnExtinguishmentOfDebt               
Gain on interest conversion 12,841gltc_GainLossOnConversionOfInterest (201,175)gltc_GainLossOnConversionOfInterest 12,841gltc_GainLossOnConversionOfInterest (201,175)gltc_GainLossOnConversionOfInterest            
Note discount     140,363us-gaap_AmortizationOfFinancingCostsAndDiscounts 173,490us-gaap_AmortizationOfFinancingCostsAndDiscounts            
Interest expense 88,216us-gaap_InterestExpense 111,795us-gaap_InterestExpense 314,823us-gaap_InterestExpense 351,559us-gaap_InterestExpense            
Convertible OID Note [Member]                    
Debt Conversion [Line Items]                    
Debt issued         1,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleDebtSecuritiesMember
         
Shares issued upon conversion of convertible note         107,143us-gaap_DebtConversionConvertedInstrumentSharesIssued1
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleDebtSecuritiesMember
         
Accrued interest         75,000us-gaap_InterestPayableCurrentAndNoncurrent
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleDebtSecuritiesMember
         
President and principal shareholder [Member] | Convertible Note Payable Dated February 2013 [Member]                    
Debt Conversion [Line Items]                    
Debt issued 1,997,483us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedFebruary2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
  1,997,483us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedFebruary2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
      1,997,483us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedFebruary2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
    1,997,483us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedFebruary2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
Debt, interest rate             7.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedFebruary2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
     
Convertible note, conversion price             $ 0.35us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedFebruary2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
$ 0.35us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedFebruary2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
   
Maturity date           Dec. 31, 2020 Dec. 31, 2016      
Loss on extinguishment of debt     34,586us-gaap_GainsLossesOnExtinguishmentOfDebt
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedFebruary2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
             
Shares issued upon conversion of convertible note               428,032us-gaap_DebtConversionConvertedInstrumentSharesIssued1
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedFebruary2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
   
Accrued interest 18,880us-gaap_InterestPayableCurrentAndNoncurrent
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedFebruary2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
  18,880us-gaap_InterestPayableCurrentAndNoncurrent
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedFebruary2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
        149,811us-gaap_InterestPayableCurrentAndNoncurrent
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedFebruary2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
  18,880us-gaap_InterestPayableCurrentAndNoncurrent
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedFebruary2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
Common stock, price per share               $ 0.32us-gaap_SharePrice
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedFebruary2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
   
Value of convertible original issue discount note               136,970us-gaap_DebtConversionConvertedInstrumentAmount1
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedFebruary2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
   
Gain on interest conversion 12,841gltc_GainLossOnConversionOfInterest
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedFebruary2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
                 
Interest expense     23,052us-gaap_InterestExpense
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedFebruary2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
             
President and principal shareholder [Member] | Convertible Note Payable Dated July 2013 [Member]                    
Debt Conversion [Line Items]                    
Debt issued 1,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedJuly2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
  1,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedJuly2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
          1,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedJuly2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
1,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedJuly2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
Debt, interest rate                 7.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedJuly2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
 
Convertible note, conversion price           0.35us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedJuly2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
    $ 1.00us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedJuly2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
 
Maturity date           Dec. 31, 2020     Jul. 10, 2018  
Loss on extinguishment of debt     562,062us-gaap_GainsLossesOnExtinguishmentOfDebt
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedJuly2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
             
Term                 5 years  
Number of shares callable by warrants                 500,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedJuly2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
 
Shares issued upon conversion of convertible note         107,143us-gaap_DebtConversionConvertedInstrumentSharesIssued1
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedJuly2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
         
Accrued interest 54,247us-gaap_InterestPayableCurrentAndNoncurrent
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedJuly2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
  54,247us-gaap_InterestPayableCurrentAndNoncurrent
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedJuly2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
  75,000us-gaap_InterestPayableCurrentAndNoncurrent
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedJuly2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
        54,247us-gaap_InterestPayableCurrentAndNoncurrent
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedJuly2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
Note discount     60,390us-gaap_AmortizationOfFinancingCostsAndDiscounts
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedJuly2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
             
Interest expense     70,915us-gaap_InterestExpense
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedJuly2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
             
Amortization of beneficial conversion feature of convertible notes     36,750gltc_AmortizationOfBeneficialConversionFeatures
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedJuly2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
             
Additional interest expense     1,238gltc_AdditionalInterestExpense
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedJuly2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
             
Unamortized discount 59,097us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedJuly2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
  59,097us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedJuly2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
            59,097us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedJuly2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
Exercise price of shares called by warrants                 $ 1.30us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_LongtermDebtTypeAxis
= gltc_ConvertibleNotePayableDatedJuly2013Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
 
President and principal shareholder [Member] | Secured convertible line of credit agreement [Member]                    
Debt Conversion [Line Items]                    
Maximum borrowing capacity           4,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
       
Debt issued 625,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
  625,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
            625,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
Debt, interest rate           7.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
       
Maturity date           Dec. 31, 2020        
Term           2 years        
Number of shares callable by warrants 1,202,814us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
  1,202,814us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
            1,202,814us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
Interest expense     449us-gaap_InterestExpense
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
             
Unamortized discount 16,547us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
  16,547us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
            16,547us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
Exercise price of shares called by warrants $ 2.00us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
  $ 2.00us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
    2.00us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
      $ 2.00us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
Unamortized beneficial conversion feature 16,546gltc_UnamortizedBeneficialConversionFeature
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
  16,546gltc_UnamortizedBeneficialConversionFeature
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
            16,546gltc_UnamortizedBeneficialConversionFeature
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
Term 2 years                  
Percentage of warrants issued equals of number of shares issuable upon the conversion           50.00%gltc_PercentageOfWarrantsIssuedEqualsToNumberOfSharesIssuableUponConversion
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
       
Number of advances received                   4gltc_NumberOfAdvancesReceived
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
Convertible amount                   625,000us-gaap_DebtConversionOriginalDebtAmount1
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
Warrant issued 2us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
  2us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
            2us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
Loan discounts related to warrants     16,771gltc_DebtDiscountsRelatedToWarrants
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
             
Loan discounts related to beneficial conversion features of advances amounting     $ 16,771gltc_DebtDiscountsRelatedToBeneficialConversionFeaturesOfAdvances
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
             
Expected term     2 years              
President and principal shareholder [Member] | Minimum [Member] | Secured convertible line of credit agreement [Member]                    
Debt Conversion [Line Items]                    
Convertible note, conversion price $ 0.24us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
  $ 0.24us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
            $ 0.24us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
Volatility rate     80.50%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
             
Discount rate     0.58%gltc_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsDiscountRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
             
President and principal shareholder [Member] | Maximum [Member] | Secured convertible line of credit agreement [Member]                    
Debt Conversion [Line Items]                    
Convertible note, conversion price $ 0.27us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
  $ 0.27us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
            $ 0.27us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
Volatility rate     87.30%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember
             
Discount rate     0.70%gltc_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsDiscountRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_TypeOfArrangementAxis
= gltc_SecuredConvertibleLineOfCreditAgreementMember