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SETTLEMENT GAIN (LOSS) (Details) (USD $)
3 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended 3 Months Ended 0 Months Ended
Dec. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Jul. 07, 2007
Dec. 12, 2011
Dec. 31, 2011
Mar. 06, 2012
Mar. 06, 2012
Mar. 31, 2012
Oct. 17, 2011
Jan. 01, 2015
Feb. 12, 2013
Loss Contingency, Settlement [Abstract]                          
Settlement loss (gain) $ 10,000us-gaap_OtherNonoperatingExpense                        
Number of shares issued under settlement agreement (in shares)                         875,000ztho_NumberOfSharesIssuedUnderSettlementAgreement
Stock to be issued for settlement loss       1,881,250ztho_AdjustmentsToAdditionalPaidInCapitalStockToBeIssuedForSettlementLoss                  
Recognized a settlement loss   10,000us-gaap_GainLossRelatedToLitigationSettlement 8,000us-gaap_GainLossRelatedToLitigationSettlement                    
Violation of the Consumer Fraud Act [Member] | Minimum [Member]                          
Loss Contingency, Settlement [Abstract]                          
Damages sought in case         200,000us-gaap_LossContingencyDamagesSoughtValue
/ us-gaap_LitigationCaseAxis
= ztho_ViolationOfConsumerFraudActMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
               
Breach of Contract and Tortuous Interference with Business Relationship [Member] | Minimum [Member]                          
Loss Contingency, Settlement [Abstract]                          
Damages sought in case           185,000us-gaap_LossContingencyDamagesSoughtValue
/ us-gaap_LitigationCaseAxis
= ztho_BreachOfContractAndTortuousInterferenceWithBusinessRelationshipMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
185,000us-gaap_LossContingencyDamagesSoughtValue
/ us-gaap_LitigationCaseAxis
= ztho_BreachOfContractAndTortuousInterferenceWithBusinessRelationshipMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
           
Mechanics lien on Property Leased [Member]                          
Loss Contingency, Settlement [Abstract]                          
Payment to the plaintiff                 62,500us-gaap_LossContingencyAccrualCarryingValuePayments
/ us-gaap_LitigationCaseAxis
= ztho_MechanicsLienOnPropertyLeasedMember
       
Settlement of lien               62,500us-gaap_LitigationSettlementExpense
/ us-gaap_LitigationCaseAxis
= ztho_MechanicsLienOnPropertyLeasedMember
  62,500us-gaap_LitigationSettlementExpense
/ us-gaap_LitigationCaseAxis
= ztho_MechanicsLienOnPropertyLeasedMember
     
Amount accrued             62,500us-gaap_LossContingencyAccrualAtCarryingValue
/ us-gaap_LitigationCaseAxis
= ztho_MechanicsLienOnPropertyLeasedMember
           
Mechanics lien on Property Leased [Member] | Minimum [Member]                          
Loss Contingency, Settlement [Abstract]                          
Damages sought in case           95,000us-gaap_LossContingencyDamagesSoughtValue
/ us-gaap_LitigationCaseAxis
= ztho_MechanicsLienOnPropertyLeasedMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
95,000us-gaap_LossContingencyDamagesSoughtValue
/ us-gaap_LitigationCaseAxis
= ztho_MechanicsLienOnPropertyLeasedMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
           
Custom Processing Agreement [Member]                          
Loss Contingency, Settlement [Abstract]                          
Term of custom processing agreement                     3 years    
Recognized a settlement loss   159,293us-gaap_GainLossRelatedToLitigationSettlement
/ us-gaap_TypeOfArrangementAxis
= ztho_CustomProcessingAgreementMember
                     
Subsequent Event [Member] | Custom Processing Agreement [Member]                          
Loss Contingency, Settlement [Abstract]                          
Recognized a settlement loss   159,293us-gaap_GainLossRelatedToLitigationSettlement
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_TypeOfArrangementAxis
= ztho_CustomProcessingAgreementMember
                     
AVEKA Nutra Processing, LLC [Member] | Subsequent Event [Member] | Custom Processing Agreement [Member]                          
Loss Contingency, Settlement [Abstract]                          
Term of custom processing agreement                       1 year  
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] | Subsequent Event [Member] | Custom Processing Agreement [Member] | Line of Credit [Member]                          
Loss Contingency, Settlement [Abstract]                          
Line of credit advances                       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
 
Interest accrued on the advance                       $ 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