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Organization and Basis of Presentation (Details) (USD $)
9 Months Ended
Mar. 31, 2015
Accounts Receivable  
Increase in provision for bad debt $ 4,019us-gaap_AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease
Write-off of accounts receivable against allowance for bad debt 34,803us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs
Inventories  
Raw materials 584,247us-gaap_InventoryRawMaterials
Finished goods $ 472,493us-gaap_InventoryFinishedGoods
Stock Options [Member]  
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]  
Shares considered antidilutive 10,245,340us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_EmployeeStockOptionMember
Warrants [Member]  
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]  
Shares considered antidilutive 7,665,271us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_WarrantMember
Stock Options For Convertible Notes Reserved [Member]  
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]  
Shares considered antidilutive 10,969,864us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= gltc_StockOptionsForConvertibleNotesReservedMember