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Stockholders' Equity (Common Stock) (Details) (USD $)
3 Months Ended 9 Months Ended 1 Months Ended 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2015
Mar. 31, 2014
Jul. 31, 2014
Dec. 31, 2014
Feb. 28, 2015
Dec. 31, 2014
Sep. 30, 2014
Feb. 01, 2013
Stockholders Equity Note [Line Items]                    
Gain on interest conversion $ 12,841gltc_GainLossOnConversionOfInterest $ (201,175)gltc_GainLossOnConversionOfInterest $ 12,841gltc_GainLossOnConversionOfInterest $ (201,175)gltc_GainLossOnConversionOfInterest            
Convertible Debt Securities [Member]                    
Stockholders Equity Note [Line Items]                    
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
         
Convertible note, amount         1,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleDebtSecuritiesMember
         
Directors [Member]                    
Stockholders Equity Note [Line Items]                    
Common stock issued           110,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_DirectorMember
       
Proceeds from private placement           21,505us-gaap_ProceedsFromIssuanceOfPrivatePlacement
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_DirectorMember
       
President and principal shareholder [Member] | Convertible Note Payable Dated February 2013 [Member]                    
Stockholders Equity Note [Line Items]                    
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
     
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
Common stock, price per share             $ 0.32us-gaap_SharePrice
/ 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
                 
Convertible note, amount 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
President and principal shareholder [Member] | Private Placement [Member]                    
Stockholders Equity Note [Line Items]                    
Common stock issued 652,174us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PrivatePlacementMember
            915,968us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PrivatePlacementMember
1,953,227us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PrivatePlacementMember
 
Expiration period 2 years                  
Number of shares callable by warrants 326,087us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PrivatePlacementMember
  326,087us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PrivatePlacementMember
    457,984us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PrivatePlacementMember
  457,984us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PrivatePlacementMember
976,614us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PrivatePlacementMember
 
Exercise price of shares called by warrants $ 2.00us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PrivatePlacementMember
  $ 2.00us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PrivatePlacementMember
             
Proceeds from private placement 150,000us-gaap_ProceedsFromIssuanceOfPrivatePlacement
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PrivatePlacementMember
            250,000us-gaap_ProceedsFromIssuanceOfPrivatePlacement
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PrivatePlacementMember
975,000us-gaap_ProceedsFromIssuanceOfPrivatePlacement
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PresidentMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PrivatePlacementMember
 
Accredited Investors [Member] | Private Placement [Member]                    
Stockholders Equity Note [Line Items]                    
Common stock issued               3,525,269us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= gltc_InvestorOneMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PrivatePlacementMember
2,205,328us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= gltc_InvestorOneMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PrivatePlacementMember
 
Expiration period               2 years 2 years  
Number of shares callable by warrants           1,762,635us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= gltc_InvestorOneMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PrivatePlacementMember
  1,762,635us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= gltc_InvestorOneMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PrivatePlacementMember
1,081,656us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= gltc_InvestorOneMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PrivatePlacementMember
 
Exercise price of shares called by warrants           $ 2.00us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= gltc_InvestorOneMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PrivatePlacementMember
  $ 2.00us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= gltc_InvestorOneMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PrivatePlacementMember
$ 2.00us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= gltc_InvestorOneMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PrivatePlacementMember
 
Proceeds from private placement               $ 1,055,000us-gaap_ProceedsFromIssuanceOfPrivatePlacement
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= gltc_InvestorOneMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PrivatePlacementMember
$ 1,125,000us-gaap_ProceedsFromIssuanceOfPrivatePlacement
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= gltc_InvestorOneMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PrivatePlacementMember