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

CONDENSED FINANCIAL INFORMATION OF THE PARENT COMPANY (Details Textual)

v3.10.0.1
CONDENSED FINANCIAL INFORMATION OF THE PARENT COMPANY (Details Textual)
12 Months Ended
Aug. 15, 2018
USD ($)
$ / shares
shares
Mar. 21, 2018
$ / shares
shares
Jan. 09, 2018
USD ($)
$ / shares
shares
Dec. 22, 2017
USD ($)
$ / shares
shares
Dec. 21, 2017
USD ($)
$ / shares
shares
Dec. 19, 2016
$ / shares
shares
Oct. 12, 2015
USD ($)
Oct. 12, 2015
USD ($)
shares
Sep. 30, 2018
USD ($)
$ / shares
shares
Sep. 30, 2017
USD ($)
$ / shares
shares
Sep. 30, 2016
USD ($)
Aug. 15, 2018
CNY (¥)
Common Stock, Par or Stated Value Per Share | $ / shares           $ 1            
Stockholders' Equity Note, Stock Split           a 180 for 1 forward stock split whereby every authorized, issued and outstanding ordinary shares was exchanged for 180 new ordinary shares            
Common Stock, Shares Authorized | shares           9,000,000     50,000,000 50,000,000    
Proceeds from Issuance of Private Placement         $ 100,000              
Stock Issued During Period, Shares, New Issues | shares   30,000     16,666              
Shares Issued, Price Per Share | $ / shares $ 2.82       $ 6.00              
Fair Value Assumption Market Price | $ / shares   $ 5.88                    
Company Indebted Amount $ 9,242,676                     ¥ 64,079,472
Restricted Ordinary Shares Issued | shares 3,280,525                      
Percentage of Average Closing Bid price 75.00%                     75.00%
Proceeds from Contributions from Affiliates                 $ 1,980,934      
Private Placement [Member]                        
Proceeds from Issuance of Private Placement     $ 500,000 $ 420,000                
Stock Issued During Period, Shares, New Issues | shares     62,500 70,000                
Shares Issued, Price Per Share | $ / shares     $ 8.00 $ 6.00                
Holding One [Member]                        
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest                 65.92%      
Holding One [Member] | HUANG Jian Cong [Member]                        
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest               45.00% 43.05%      
WANG Jian Di [Member]                        
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest             10.00%   1.09%      
WANG Ming Jie [Member]                        
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest                 10.89%      
WANG Guo Lin [Member]                        
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest                 10.89%      
WANG Yang Ming [Member]                        
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest               5.00%        
Parent Company [Member]                        
Number Of Shares Transferred | shares               9,000,000        
Due from Related Parties             $ 50,000 $ 50,000        
Common Stock, Par or Stated Value Per Share | $ / shares           $ 1     $ 0 $ 0    
Stockholders' Equity Note, Stock Split           a 180 for 1 forward stock split whereby every authorized, issued and outstanding ordinary shares was exchanged for 180 new ordinary shares            
Common Stock, Shares Authorized | shares           9,000,000     50,000,000 50,000,000    
Payments of Distributions to Affiliates                 $ 677,863 $ 5,581,999 $ 0  
Proceeds from Contributions from Affiliates                 1,980,934  
Parent Company [Member] | ZK International [Member]                        
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest               100.00%        
Parent Company [Member] | ZK Pipe [Member]                        
Payments of Distributions to Affiliates                 $ 677,863      
Parent Company [Member] | WANG Jian Di [Member]                        
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest               10.00%        
Parent Company [Member] | WANG Ming Jie [Member]                        
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest               20.00%        
Parent Company [Member] | WANG Guo Lin [Member]                        
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest               20.00%        
Parent Company [Member] | HUANG Cong [Member]                        
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest               45.00%