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STATEMENTS OF OPERATIONS (Unaudited) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
REVENUES:    
Products $ 214,743us-gaap_SalesRevenueGoodsNet $ 316,470us-gaap_SalesRevenueGoodsNet
Total revenues 214,743us-gaap_SalesRevenueNet 316,470us-gaap_SalesRevenueNet
COST OF REVENUES:    
Products 394,812us-gaap_CostOfGoodsSold 313,981us-gaap_CostOfGoodsSold
Total cost of revenues 394,812us-gaap_CostOfRevenue 313,981us-gaap_CostOfRevenue
GROSS MARGIN (180,069)us-gaap_GrossProfit 2,489us-gaap_GrossProfit
OPERATING EXPENSES:    
Research and development costs 0us-gaap_ResearchAndDevelopmentExpense 398,377us-gaap_ResearchAndDevelopmentExpense
Selling, general and administrative 4,874,816us-gaap_SellingGeneralAndAdministrativeExpense 1,101,610us-gaap_SellingGeneralAndAdministrativeExpense
Total operating expenses 4,874,816us-gaap_OperatingExpenses 1,499,987us-gaap_OperatingExpenses
OPERATING LOSS (5,054,885)us-gaap_OperatingIncomeLoss (1,497,498)us-gaap_OperatingIncomeLoss
OTHER INCOME (EXPENSES):    
Rental and other income 0us-gaap_OtherNonoperatingIncome 200us-gaap_OtherNonoperatingIncome
Interest income 0us-gaap_InvestmentIncomeInterest 6,781us-gaap_InvestmentIncomeInterest
Interest expense - other (2,219)us-gaap_InterestExpenseOther (508)us-gaap_InterestExpenseOther
Interest expense - debt (60,380)us-gaap_InterestExpenseDebt (5,232)us-gaap_InterestExpenseDebt
Change in fair value - derivative (2,233,776)us-gaap_GainLossOnDerivativeInstrumentsNetPretax 48,188us-gaap_GainLossOnDerivativeInstrumentsNetPretax
Loss on debt conversion (351,314)ztho_IncomeLossOnDebtConversion 0ztho_IncomeLossOnDebtConversion
Settlement gain 0us-gaap_GainLossRelatedToLitigationSettlement 10,000us-gaap_GainLossRelatedToLitigationSettlement
Total other income expenses (2,647,689)us-gaap_NonoperatingIncomeExpense 59,429us-gaap_NonoperatingIncomeExpense
NET LOSS (7,702,574)us-gaap_NetIncomeLoss (1,438,069)us-gaap_NetIncomeLoss
Less Preferred Dividends 48,617us-gaap_PreferredStockDividendsIncomeStatementImpact 0us-gaap_PreferredStockDividendsIncomeStatementImpact
NET LOSS ATTRIBUTABLE TO COMMON STOCKHOLDERS $ (7,751,191)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic $ (1,438,069)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
NET LOSS PER SHARE - BASIC AND DILUTED (in dollars per share) $ (0.19)us-gaap_EarningsPerShareBasicAndDiluted $ (0.04)us-gaap_EarningsPerShareBasicAndDiluted
Weighted Average Number of Shares Basic and Diluted (in shares) 40,092,547us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 39,728,505us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding