BALANCE SHEET (USD $)	Dec. 31, 2014	Dec. 31, 2013
Current Assets
Cash and cash equivalents	$ 1,027,713	$ 443,472
Accounts receivable	46,188us-gaap_AccountsReceivableNetCurrent	380,238us-gaap_AccountsReceivableNetCurrent
Inventory	709,029us-gaap_InventoryNet	544,535us-gaap_InventoryNet
Prepaid expenses and other assets	63,296	136,887
Total current assets	1,846,226us-gaap_AssetsCurrent	1,505,132us-gaap_AssetsCurrent
Long Term Assets
Note receivable	0	550,650
Other assets	15,393us-gaap_OtherAssetsNoncurrent	11,892us-gaap_OtherAssetsNoncurrent
Property and equipment, net	1,207,975us-gaap_PropertyPlantAndEquipmentNet	1,800,306us-gaap_PropertyPlantAndEquipmentNet
Total long term assets	1,223,368us-gaap_AssetsNoncurrent	2,362,848us-gaap_AssetsNoncurrent
TOTAL ASSETS	3,069,594us-gaap_Assets	3,867,980us-gaap_Assets
Current Liabilities
Accounts payable	1,033,875us-gaap_AccountsPayableCurrent	374,566us-gaap_AccountsPayableCurrent
Short-term borrowings	588,211us-gaap_ShortTermBorrowings	0us-gaap_ShortTermBorrowings
Short-term nonconvertible note payable to related party	270,000	0
Customer deposit	70,400us-gaap_CustomerDepositsCurrent	0us-gaap_CustomerDepositsCurrent
Accrued expenses and other	367,331us-gaap_AccruedLiabilitiesCurrent	194,144us-gaap_AccruedLiabilitiesCurrent
Accrued liquidated damages	36,178ztho_AccruedLiquidatedDamagesCurrent	36,178ztho_AccruedLiquidatedDamagesCurrent
Derivative liabilities	20,166us-gaap_DerivativeLiabilitiesCurrent	95,049us-gaap_DerivativeLiabilitiesCurrent
Total Current Liabilities	2,386,161us-gaap_LiabilitiesCurrent	699,937us-gaap_LiabilitiesCurrent
Total Liabilities	3,376,161us-gaap_Liabilities	699,937us-gaap_Liabilities
Long-term convertible notes payable to related parties	990,000	0
Stockholders' Equity (Deficit)
Common stock, $0.00005 par value; authorized 200,000,000 shares; issued and outstanding 39,734,854 and 39,449,138 shares, December 31, 2014 and 2013, respectively	1,987us-gaap_CommonStockValue	1,973us-gaap_CommonStockValue
Preferred stock payable	1,010,000	0
Additional paid-in capital	131,134,645	130,039,561
Accumulated deficit	(132,453,199)	(126,873,491)
Total Stockholders' Equity (Deficit)	(306,567)us-gaap_StockholdersEquity	3,168,043us-gaap_StockholdersEquity
TOTAL LIABILITIES & STOCKHOLDERS' EQUITY (DEFICIT)	$ 3,069,594	$ 3,867,980

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant