LIQUIDATED DAMAGES (Details) - USD ($)	9 Months Ended
Sep. 30, 2015	Dec. 31, 2014
LIQUIDATED DAMAGES [Abstract]
Liquidation damages	1.50%
Maximum period to file a registration statement	30 days
Accrued liquidated damages, current	$ 36,178	$ 36,178

Carrying value as of the balance sheet date of obligations incurred and payable related to liquidated damages. Used to reflect the current portion of the liabilities (due within on year or within the normal operating cycle if longer).

No definition available.

Name:	ztho_AccruedLiquidatedDamagesCurrent
Namespace Prefix:	ztho_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant