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NOTE RECEIVABLE (Details) (USD $)
12 Months Ended 0 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Oct. 17, 2011
Jan. 01, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Recognized a settlement loss $ 10,000us-gaap_GainLossRelatedToLitigationSettlement $ 8,000us-gaap_GainLossRelatedToLitigationSettlement    
Custom Processing Agreement [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Term of custom processing agreement     3 years  
Automatic renewals terms of CPA     2 years  
Monthly minimum production requirements (in lbs.)     40,000ztho_MonthlyMinimumProductionRequirements
/ us-gaap_TypeOfArrangementAxis
= ztho_CustomProcessingAgreementMember
 
Average minimum monthly production volumes (in lbs.)     100,000ztho_AverageMinimumMonthlyProductionVolumes
/ us-gaap_TypeOfArrangementAxis
= ztho_CustomProcessingAgreementMember
 
Future monthly production volume requirements, maximum (in lbs.)     1,000,000ztho_FutureMonthlyProductionVolumeRequirementsMaximum
/ us-gaap_TypeOfArrangementAxis
= ztho_CustomProcessingAgreementMember
 
Specified quantity of product ordered for three consecutive months for loan payback terms     80,000ztho_SpecifiedQuantityOfProductOrderedForThreeConsecutiveMonthsForLoanPaybackTerms
/ us-gaap_TypeOfArrangementAxis
= ztho_CustomProcessingAgreementMember
 
Recognized a settlement loss 159,293us-gaap_GainLossRelatedToLitigationSettlement
/ us-gaap_TypeOfArrangementAxis
= ztho_CustomProcessingAgreementMember
     
Custom Processing Agreement [Member] | Subsequent Event [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Recognized a settlement loss 159,293us-gaap_GainLossRelatedToLitigationSettlement
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_TypeOfArrangementAxis
= ztho_CustomProcessingAgreementMember
     
AVEKA Nutra Processing, LLC [Member] | Custom Processing Agreement [Member] | Subsequent Event [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Term of custom processing agreement       1 year
Automatic renewals terms of CPA       2 years
Company owed ANP relating to original agreement amount       359,713us-gaap_AccruedLiabilitiesCurrentAndNoncurrent
/ us-gaap_CounterpartyNameAxis
= ztho_AvekaNutraProcessingLlcMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_TypeOfArrangementAxis
= ztho_CustomProcessingAgreementMember
Minimum production requirements per order (in lbs) 40,000ztho_MinimumProductionRequirementsPerOrder
/ us-gaap_CounterpartyNameAxis
= ztho_AvekaNutraProcessingLlcMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_TypeOfArrangementAxis
= ztho_CustomProcessingAgreementMember
    40,000ztho_MinimumProductionRequirementsPerOrder
/ us-gaap_CounterpartyNameAxis
= ztho_AvekaNutraProcessingLlcMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_TypeOfArrangementAxis
= ztho_CustomProcessingAgreementMember
AVEKA Nutra Processing, LLC [Member] | Line of Credit [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Periodic collections of advances and accrued interest 5,000ztho_NoteReceivablePeriodicCollections
/ us-gaap_CounterpartyNameAxis
= ztho_AvekaNutraProcessingLlcMember
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
     
AVEKA Nutra Processing, LLC [Member] | Line of Credit [Member] | Custom Processing Agreement [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Maximum borrowing capacity     500,000ztho_LineOfCreditFacilityReceivableMaximumBorrowingCapacity
/ us-gaap_CounterpartyNameAxis
= ztho_AvekaNutraProcessingLlcMember
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
/ us-gaap_TypeOfArrangementAxis
= ztho_CustomProcessingAgreementMember
 
Operating cost drawdown for capital expenditures, maximum     5,000ztho_OperatingCostDrawdownForCapitalExpendituresMaximum
/ us-gaap_CounterpartyNameAxis
= ztho_AvekaNutraProcessingLlcMember
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
/ us-gaap_TypeOfArrangementAxis
= ztho_CustomProcessingAgreementMember
 
Credit drawn down maximum per period     75,000ztho_CreditDrawnDownMaximumPerPeriod
/ us-gaap_CounterpartyNameAxis
= ztho_AvekaNutraProcessingLlcMember
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
/ us-gaap_TypeOfArrangementAxis
= ztho_CustomProcessingAgreementMember
 
Drawdown period threshold     30 days  
AVEKA Nutra Processing, LLC [Member] | Line of Credit [Member] | Custom Processing Agreement [Member] | Subsequent Event [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Outstanding line of credit       459,608us-gaap_NotesReceivableNet
/ us-gaap_CounterpartyNameAxis
= ztho_AvekaNutraProcessingLlcMember
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_TypeOfArrangementAxis
= ztho_CustomProcessingAgreementMember
Accrued interest       59,398us-gaap_InterestReceivableNoncurrent
/ us-gaap_CounterpartyNameAxis
= ztho_AvekaNutraProcessingLlcMember
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_TypeOfArrangementAxis
= ztho_CustomProcessingAgreementMember
AVEKA Nutra Processing, LLC [Member] | Note Receivable [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loan advances $ 10,000ztho_LoanAdvances
/ us-gaap_CounterpartyNameAxis
= ztho_AvekaNutraProcessingLlcMember
/ us-gaap_CreditFacilityAxis
= us-gaap_FinanceReceivablesMember
     
Interest rate on loan receivable (in hundredths) 5.50%us-gaap_ReceivableWithImputedInterestEffectiveYieldInterestRate
/ us-gaap_CounterpartyNameAxis
= ztho_AvekaNutraProcessingLlcMember
/ us-gaap_CreditFacilityAxis
= us-gaap_FinanceReceivablesMember