Amount of the required periodic payments including both interest and principal payments.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 470

-Section 50

-Paragraph 3

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The effective interest rate during the reporting period.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
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- Details

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Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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

- Definition

The interest rate on credit facility in case of default during the reporting period.

+ References

No definition available.

+ Details

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Namespace Prefix:	ztho_
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Balance Type:	na
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- Definition

Amount required for successive monthly installments periodic payments including both interest and principal payments.

+ References

No definition available.

+ Details

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SHORT-TERM BORROWINGS (Details) (Line of Credit facility [Member], USD $)	0 Months Ended
	Jul. 25, 2014	Jul. 16, 2014	Mar. 24, 2014	Jul. 25, 2014	Jul. 16, 2014	Mar. 24, 2014
Line of Credit facility [Member]
Line of Credit Facility [Line Items]
Revolving loan amount to the company				$ 668,750	$ 582,841.63	$ 500,000
Monthly periodic payment	12,143	12,143	10,417
Fixed rate of interest (in hundredths)	22.00%	22.00%	20.00%
Interest rate in case of default (in hunderdths)			25.00%
Successive monthly installments payment	$ 13,679