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STATEMENTS OF CASH FLOWS (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES    
Net loss $ (5,579,708)us-gaap_NetIncomeLoss $ (13,432,261)us-gaap_NetIncomeLoss
Adjustments to reconcile loss from continuing operations to net cash used in operating activities:    
Stock based compensation - stock options vested 935,097us-gaap_ShareBasedCompensation 2,318,355us-gaap_ShareBasedCompensation
Common shares issued for director fees 160,001ztho_SharesIssuedForDirectorFees 200,002ztho_SharesIssuedForDirectorFees
Shares & warrants issued for services 0us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims 630,933us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims
Loss on equity modification 0ztho_ExpenseForModificationOfWarrantsPreviouslyIssuedForServices 5,780,457ztho_ExpenseForModificationOfWarrantsPreviouslyIssuedForServices
Depreciation 592,331us-gaap_Depreciation 643,575us-gaap_Depreciation
Loss on disposal of equipment 0us-gaap_GainLossOnDispositionOfAssets 1,334us-gaap_GainLossOnDispositionOfAssets
Loss on settlement with vendor 159,293ztho_GainLossOnSettlementWithVendor 0ztho_GainLossOnSettlementWithVendor
Inventory valuation reserve 0us-gaap_InventoryWriteDown 742,168us-gaap_InventoryWriteDown
Change in derivative liability, net of bifurcation (74,883)us-gaap_UnrealizedGainLossOnDerivatives (966,736)us-gaap_UnrealizedGainLossOnDerivatives
Adjustment to settlement loss accrual 0us-gaap_OtherNoncashExpense (8,000)us-gaap_OtherNoncashExpense
Changes in operating assets and liabilities:    
Accounts receivable 334,050us-gaap_IncreaseDecreaseInAccountsReceivable (80,982)us-gaap_IncreaseDecreaseInAccountsReceivable
Inventory (164,494)us-gaap_IncreaseDecreaseInInventories (817,401)us-gaap_IncreaseDecreaseInInventories
Prepaid expenses and other assets 70,090us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets (60)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Note receivable 31,644ztho_IncreaseDecreaseInLetterOfCreditOperatingActivities (27,500)ztho_IncreaseDecreaseInLetterOfCreditOperatingActivities
Accounts payable and accrued expenses 1,262,609us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities 74,289us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
CASH USED IN OPERATING ACTIVITIES (2,273,970)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations (4,941,827)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
CASH FLOWS FROM INVESTING ACTIVITIES    
Proceeds from sale of fixed assets 0us-gaap_ProceedsFromSaleOfOtherAssetsInvestingActivities 750us-gaap_ProceedsFromSaleOfOtherAssetsInvestingActivities
CASH PROVIDED BY INVESTING ACTIVITIES 0us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations 750us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
CASH FLOWS FROM FINANCING ACTIVITES    
Proceeds from sale of common stock, net 0us-gaap_ProceedsFromIssuanceOfCommonStock 2,172,165us-gaap_ProceedsFromIssuanceOfCommonStock
Proceeds from exercise of stock options 0us-gaap_ProceedsFromStockOptionsExercised 77,734us-gaap_ProceedsFromStockOptionsExercised
Proceeds from exercise of warrants 0us-gaap_ProceedsFromWarrantExercises 2,489,846us-gaap_ProceedsFromWarrantExercises
Proceeds from deposits for sale of convertible preferred stock 1,010,000us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock 0us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock
Borrowing on short term debt 700,000us-gaap_ProceedsFromShortTermDebt 0us-gaap_ProceedsFromShortTermDebt
Borrowing on long term convertible notes payable to related parties 990,000us-gaap_ProceedsFromIssuanceOfLongTermDebt 0us-gaap_ProceedsFromIssuanceOfLongTermDebt
Borrowing on short term nonconvertible notes payable to related party 270,000ztho_BorrowingOnShortTermNotePayable 0ztho_BorrowingOnShortTermNotePayable
Principal payments on debt (111,789)us-gaap_RepaymentsOfDebt 0us-gaap_RepaymentsOfDebt
CASH PROVIDED BY FINANCING ACTIVITIES 2,858,211us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations 4,739,745us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
NET INCREASE (DECREASE) INCREASE IN CASH 584,241us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease (201,332)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
CASH AT BEGINNING OF PERIOD 443,472us-gaap_CashAndCashEquivalentsAtCarryingValue 644,804us-gaap_CashAndCashEquivalentsAtCarryingValue
CASH AT THE PERIOD ENDED DECEMBER 31 1,027,713us-gaap_CashAndCashEquivalentsAtCarryingValue 443,472us-gaap_CashAndCashEquivalentsAtCarryingValue
Supplemental Disclosures of Cash Flow Information:    
Cash paid during the period for interest 92,408us-gaap_InterestPaid 0us-gaap_InterestPaid
Cashless exercise of warrants 0ztho_CashLessExerciseOfWarrants 180ztho_CashLessExerciseOfWarrants
Cashless exercise of options 0ztho_CashlessExerciseOfOptions 5ztho_CashlessExerciseOfOptions
Shares issued for stock payable related to settlement loss 0ztho_SharesIssuedForSettlementLoss 1,881,250ztho_SharesIssuedForSettlementLoss
Preferred stock conversion 0ztho_PreferredStockConversion 2,690,056ztho_PreferredStockConversion
Change in derivative liability due to exercise of warrants 0ztho_ChangeInDerivativeLiabilityDueToExerciseOfWarrants 4,201,908ztho_ChangeInDerivativeLiabilityDueToExerciseOfWarrants
Change in derivative liability due to conversion of preferred stock 0ztho_ChangeInDerivativeLiabilityDueToConversionOfPreferredStock 2,761,688ztho_ChangeInDerivativeLiabilityDueToConversionOfPreferredStock
Dividends payable declared $ 0us-gaap_DividendsCommonStockCash $ 56,144us-gaap_DividendsCommonStockCash