XML 43 R59.htm IDEA: XBRL DOCUMENT v2.4.1.9
SUBSEQUENT EVENTS (Details) (USD $)
3 Months Ended 0 Months Ended 3 Months Ended 12 Months Ended 0 Months Ended
Mar. 31, 2015
Mar. 18, 2015
Feb. 09, 2015
Jan. 08, 2015
Mar. 31, 2014
Dec. 31, 2014
May 04, 2015
Apr. 29, 2015
May 14, 2015
May 05, 2015
Subsequent Event [Line Items]                    
Exercise price of warrants (in dollars per share) $ 0.64us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 0.64us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 0.64us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 0.64us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1            
Current lease expiration date Jul. 14, 2015                  
Convertible preferred stock issued (in shares)     125,000us-gaap_PreferredStockSharesIssued              
Nonconvertible Subordinated Secured Notes Dated on September 29, 2014 [Member]                    
Subsequent Event [Line Items]                    
Interest rate on convertible senior secured notes (in hundredths) 14.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= ztho_NonconvertibleSubordinatedSecuredNotesOneMember
                 
Maturity date May 29, 2015                  
Nonconvertible Subordinated Secured Notes Dated on October 23, 2014 [Member]                    
Subsequent Event [Line Items]                    
Interest rate on convertible senior secured notes (in hundredths) 14.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= ztho_NonconvertibleSubordinatedSecuredNotesTwoMember
                 
Maturity date May 29, 2015                  
Nonconvertible Subordinated Secured Notes Dated on October 30, 2014 [Member]                    
Subsequent Event [Line Items]                    
Interest rate on convertible senior secured notes (in hundredths) 14.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= ztho_NonconvertibleSubordinatedSecuredNotesThreeMember
                 
Maturity date May 29, 2015                  
Nonconvertible Subordinated Secured Notes Dated on December 3, 2014 [Member]                    
Subsequent Event [Line Items]                    
Interest rate on convertible senior secured notes (in hundredths) 14.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= ztho_NonconvertibleSubordinatedSecuredNotesFourMember
                 
Maturity date May 29, 2015                  
Morris Garfinkle [Member]                    
Subsequent Event [Line Items]                    
Warrants issued to purchase common stock (in shares)     31,000,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ztho_MorrisGarfinkleMember
             
Exercise price of warrants (in dollars per share)     0.45us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ztho_MorrisGarfinkleMember
             
Landlord [Member]                    
Subsequent Event [Line Items]                    
Warrants issued to purchase common stock (in shares) 171,454us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ztho_LandlordMember
        171,454us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ztho_LandlordMember
       
Exercise price of warrants (in dollars per share) $ 0.64us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ztho_LandlordMember
        0.64us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ztho_LandlordMember
       
Convertible Preferred Stock [Member]                    
Subsequent Event [Line Items]                    
Convertible preferred stock issued (in shares) 481,590us-gaap_PreferredStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember
        0us-gaap_PreferredStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember
       
Convertible preferred stock, dividend rate (in hundredths)   12.50%us-gaap_PreferredStockDividendRatePercentage
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember
12.50%us-gaap_PreferredStockDividendRatePercentage
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember
12.50%us-gaap_PreferredStockDividendRatePercentage
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember
12.50%us-gaap_PreferredStockDividendRatePercentage
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember
         
Convertible Preferred Stock [Member] | Landlord [Member]                    
Subsequent Event [Line Items]                    
Convertible preferred stock issued (in shares) 20,025us-gaap_PreferredStockSharesIssued
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ztho_LandlordMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember
        20,025us-gaap_PreferredStockSharesIssued
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ztho_LandlordMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember
       
Convertible preferred stock, dividend rate (in hundredths) 12.50%us-gaap_PreferredStockDividendRatePercentage
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ztho_LandlordMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember
        12.50%us-gaap_PreferredStockDividendRatePercentage
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ztho_LandlordMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember
       
Preferred stock conversion into common stock (in shares) 0.088us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ztho_LandlordMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember
        0.088us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ztho_LandlordMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember
       
Subsequent Event [Member]                    
Subsequent Event [Line Items]                    
Reduced exercise price (in dollars per share)               $ 0.00005ztho_ReducedExercisePrice
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
   
Percentage of warrants receive common stock in exchange (in hundredths)               17.50%ztho_PercentageOfWarrantsReceiveCommonStockInExchange
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
   
Extension term of warrants to waive anti-dilution rights               2 years    
Number of warrants outstanding (in shares)               55,334,490us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
   
Class of warrant or right outstanding associated with anti-dilutive provision (in shares)               38,888,147ztho_ClassOfWarrantOrRightOutstandingAssociatedWithAntiDilutiveProvision
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
   
Stock options granted (in shares)             2,899,600us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
     
Stock options granted, exercise price (in dollar per share)             $ 0.27us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
     
Percentage of vesting options on date of grant (in hundredths)             25.00%ztho_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfAwardsVestedAtGrantDate
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
     
Percentage of vesting options on three months from date of grant (in hundredths)             25.00%ztho_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPercentageOnNinetyDaysSubsequentToGrantDatePercentage
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
     
Percentage of vesting options on six months from date of grant (in hundredths)             25.00%ztho_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPercentageOnOneHundredAndEightyDaysSubsequentToGrantDatePercentage
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
     
Percentage of vesting options on nine months from date of grant (in hundredths)             25.00%ztho_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPercentageOnTwoHundredAndSeventyDaysSubsequentToGrantDatePercentage
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
     
Current lease expiration date Oct. 14, 2015                  
Subsequent Event [Member] | E.B. Smith Jr, CEO and Shareholder [Member]                    
Subsequent Event [Line Items]                    
Warrants issued to purchase common stock (in shares)                 750,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ztho_ChiefExecutiveOfficerAndShareholderMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
 
Exercise price of warrants (in dollars per share)                 $ 0.35us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ztho_ChiefExecutiveOfficerAndShareholderMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
 
Number of warrants vesting after mutual execution of agreement (in shares)                 450,000ztho_NumberOfWarrantsVestingAfterMutualExecutionOfAgreement
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ztho_ChiefExecutiveOfficerAndShareholderMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
 
Number of warrants vesting after three months of agreement (in shares)                 150,000ztho_NumberOfWarrantsVestingAfterPeriodOneOfAgreement
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ztho_ChiefExecutiveOfficerAndShareholderMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
 
Number of warrants vesting after six months of agreement (in shares)                 150,000ztho_NumberOfWarrantsVestingAfterPeriodTwoOfAgreement
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ztho_ChiefExecutiveOfficerAndShareholderMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
 
Subsequent Event [Member] | Terme Bancorp [Member]                    
Subsequent Event [Line Items]                    
Warrants issued to purchase common stock (in shares)                 1,250,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ztho_TermeBancorpMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
 
Exercise price of warrants (in dollars per share)                 $ 0.35us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ztho_TermeBancorpMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
 
Number of warrants vesting after mutual execution of agreement (in shares)                 750,000ztho_NumberOfWarrantsVestingAfterMutualExecutionOfAgreement
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ztho_TermeBancorpMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
 
Number of warrants vesting after three months of agreement (in shares)                 250,000ztho_NumberOfWarrantsVestingAfterPeriodOneOfAgreement
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ztho_TermeBancorpMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
 
Number of warrants vesting after six months of agreement (in shares)                 250,000ztho_NumberOfWarrantsVestingAfterPeriodTwoOfAgreement
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ztho_TermeBancorpMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
 
Subsequent Event [Member] | Landlord [Member]                    
Subsequent Event [Line Items]                    
Warrants issued to purchase common stock (in shares)                   68,566us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ztho_LandlordMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Exercise price of warrants (in dollars per share)                   $ 0.64us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ztho_LandlordMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Warrants vesting term                   5 years
Subsequent Event [Member] | Convertible Preferred Stock [Member] | Landlord [Member]                    
Subsequent Event [Line Items]                    
Convertible preferred stock issued (in shares)                   8,010us-gaap_PreferredStockSharesIssued
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ztho_LandlordMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Convertible preferred stock, dividend rate (in hundredths)                   12.50%us-gaap_PreferredStockDividendRatePercentage
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ztho_LandlordMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Preferred stock conversion into common stock (in shares)                   0.088us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ztho_LandlordMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember