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WARRANTS (Schedule of Warrant Activities) (Details)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Class of Warrant or Right [Line Items]      
Underlying shares outstanding, beginning balance 160,000,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights 360,000,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights 80,000,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Issued     280,000,000kz_ClassOfWarrantOrRightIssued
Exercised (40,000,000)kz_StockIssuedDuringPeriodSharesExerciseOfWarrants (200,000,000)kz_StockIssuedDuringPeriodSharesExerciseOfWarrants  
Forfeited (40,000,000)kz_ClassOfWarrantOrRightForfeited    
Underlying shares outstanding, ending balance 80,000,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights 160,000,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights 360,000,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights