COMMITMENTS AND CONTINGENCIES (Purchase Obligations and Sales Tax) (Details) (USD $)	12 Months Ended
Dec. 31, 2014
Recorded Unconditional Purchase Obligation [Line Items]
2015	833,187
2016	78,252
2017	27,849
2018	3,785
2019 and thereafter
Potential additional business tax, amount	4,910,109kz_PotentialAdditionalBusinessTaxAmount
Minimum [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Sales tax	3.00%
Maximum [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Sales tax	5.00%

Potential Additional Business Tax Amount.

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- Definition

Sales tax rates defined by the related tax rules and regulations.

+ References

No definition available.

+ Details

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- Definition

Amount of the recorded unconditional purchase obligation maturing after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 440

-SubTopic 10

-Section 50

-Paragraph 6

-URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25383-109308

+ Details

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- Definition

Amount of the recorded unconditional purchase obligation maturing in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

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- Definition

Amount of the recorded unconditional purchase obligation maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

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Amount of the recorded unconditional purchase obligation maturing in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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- Definition

Amount of the recorded unconditional purchase obligation maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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