Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

SIGNIFICANT ACCOUNTING POLICIES (Details)

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SIGNIFICANT ACCOUNTING POLICIES (Details)
USh in Millions
12 Months Ended
Oct. 12, 2015
Sep. 30, 2018
USD ($)
Sep. 30, 2018
CNY (¥)
Sep. 30, 2018
UGX (USh)
Sep. 30, 2018
HKD ($)
Sep. 30, 2017
CNY (¥)
Subsidiary One [Member]            
Subsidiary of Limited Liability Company or Limited Partnership, Name of the Entity   ZK International        
Subsidiary of Limited Liability Company or Limited Partnership, State   BVI        
Subsidiary of Limited Liability Company or Limited Partnership, Date   May 13, 2015        
Subsidiary of Limited Liability Company or Limited Partnership, Registered Capital   $ 50,000        
Subsidiary of Limited Liability Company or Limited Partnership, Business Purpose   A holding company with no operation activities itself for the years then ended        
Subsidiary One [Member] | HUANG Jian Cong [Member]            
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest   43.05%        
Subsidiary One [Member] | WANG Ming Jie [Member]            
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest 20.00% 10.89%        
Subsidiary One [Member] | WANG Guo Lin [Member]            
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest 20.00% 10.89%        
Subsidiary One [Member] | WANG Jian Di [Member]            
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest   1.09%        
Subsidiary Two [Member]            
Subsidiary of Limited Liability Company or Limited Partnership, Name of the Entity   ZK Pipe        
Subsidiary of Limited Liability Company or Limited Partnership, State   Hong Kong        
Subsidiary of Limited Liability Company or Limited Partnership, Date   May 28, 2015        
Subsidiary of Limited Liability Company or Limited Partnership, Registered Capital         $ 1,000,000  
Subsidiary of Limited Liability Company or Limited Partnership, Business Purpose   Have not commenced operations        
Subsidiary Two [Member] | ZK International [Member]            
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest 100.00% 100.00%        
Subsidiary Three [Member]            
Subsidiary of Limited Liability Company or Limited Partnership, Name of the Entity   Wenzhou Weijia        
Subsidiary of Limited Liability Company or Limited Partnership, State   Wenzhou        
Subsidiary of Limited Liability Company or Limited Partnership, Date   Jun. 17, 2015        
Subsidiary of Limited Liability Company or Limited Partnership, Registered Capital   $ 20,000,000        
Subsidiary of Limited Liability Company or Limited Partnership, Business Purpose   Have not commenced operations        
Subsidiary Three [Member] | ZK Pipe [Member]            
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest   100.00%        
Subsidiary Four [Member]            
Subsidiary of Limited Liability Company or Limited Partnership, Name of the Entity   Zhejiang Zhengkang        
Subsidiary of Limited Liability Company or Limited Partnership, State   Wenzhou        
Subsidiary of Limited Liability Company or Limited Partnership, Date   Dec. 04, 2001        
Subsidiary of Limited Liability Company or Limited Partnership, Registered Capital | ¥     ¥ 30,000,000     ¥ 100,000,000
Subsidiary of Limited Liability Company or Limited Partnership, Business Purpose   Principally operated in manufacturing and sales of steel strip, steel pipe and fittings        
Subsidiary Four [Member] | HUANG Jian Cong [Member]            
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest   1.00%        
Subsidiary Four [Member] | Wenzhou Weijia [Member]            
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest   99.00%        
Subsidiary Five [Member]            
Subsidiary of Limited Liability Company or Limited Partnership, Name of the Entity   Wenzhou Zhengfeng        
Subsidiary of Limited Liability Company or Limited Partnership, State   Wenzhou        
Subsidiary of Limited Liability Company or Limited Partnership, Date   Dec. 24, 1999        
Subsidiary of Limited Liability Company or Limited Partnership, Registered Capital | ¥     2,880,000      
Subsidiary of Limited Liability Company or Limited Partnership, Business Purpose   Principally operated in trading of steel strip, mainly purchased from Zhejiang Zhengkang        
Subsidiary Five [Member] | Zhejiang Zhengkang [Member]            
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest   100.00%        
Subsidiary Six [Member]            
Subsidiary of Limited Liability Company or Limited Partnership, Name of the Entity   Zhenglong Ecommerce        
Subsidiary of Limited Liability Company or Limited Partnership, State   Wenzhou        
Subsidiary of Limited Liability Company or Limited Partnership, Date   Mar. 15, 2018        
Subsidiary of Limited Liability Company or Limited Partnership, Registered Capital | ¥     ¥ 5,000,000      
Subsidiary of Limited Liability Company or Limited Partnership, Business Purpose   Principally operated in online sales and promoting of steel strip, steel pipe and fittings        
Subsidiary Six [Member] | Zhejiang Zhengkang [Member]            
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest   90.00%        
Subsidiary Seven [Member]            
Subsidiary of Limited Liability Company or Limited Partnership, Name of the Entity   ZK Uganda        
Subsidiary of Limited Liability Company or Limited Partnership, State   Uganda        
Subsidiary of Limited Liability Company or Limited Partnership, Date   Mar. 23, 2018        
Subsidiary of Limited Liability Company or Limited Partnership, Registered Capital | USh       USh 20    
Subsidiary of Limited Liability Company or Limited Partnership, Business Purpose   Have not commenced operations        
Subsidiary Seven [Member] | ZK International [Member]            
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest   80.00%        
Subsidiary Eight [Member]            
Subsidiary of Limited Liability Company or Limited Partnership, Name of the Entity   XSigma        
Subsidiary of Limited Liability Company or Limited Partnership, State   BVI        
Subsidiary of Limited Liability Company or Limited Partnership, Date   Jan. 18, 2018        
Subsidiary of Limited Liability Company or Limited Partnership, Registered Capital   $ 50,000        
Subsidiary of Limited Liability Company or Limited Partnership, Business Purpose   Have not commenced operations        
Subsidiary Eight [Member] | ZK International [Member]            
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest   100.00%