v3.26.1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED) - Schedule of Ownership Interests (Details) - 6 months ended Mar. 31, 2026
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Subsidiary One [Member]    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED) - Schedule of Ownership Interests (Details) [Line Items]    
Entity Name ZK International Group Co., Ltd.  
Registered Location BVI  
Incorporated date May 13, 2015  
Registered capital $ 50,000  
Subsidiary One [Member] | Golden Hill Investment Management Co Ltd [Member]    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED) - Schedule of Ownership Interests (Details) [Line Items]    
Ownership as of the issuance date of the report 5.51%  
Subsidiary One [Member] | WANG Guo Lin [Member]    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED) - Schedule of Ownership Interests (Details) [Line Items]    
Ownership as of the issuance date of the report 5.92%  
Subsidiary Two [Member]    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED) - Schedule of Ownership Interests (Details) [Line Items]    
Entity Name xSigma Collectibles Limited  
Registered Location BVI  
Incorporated date Jul. 06, 2021  
Registered capital $ 100  
Subsidiary Two [Member] | ZK International [Member]    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED) - Schedule of Ownership Interests (Details) [Line Items]    
Ownership as of the issuance date of the report 100.00%  
Subsidiary Three [Member]    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED) - Schedule of Ownership Interests (Details) [Line Items]    
Entity Name XSigma Entertainment Limited  
Registered Location BVI  
Incorporated date Mar. 17, 2021  
Registered capital $ 50,000  
Subsidiary Three [Member] | ZK International [Member]    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED) - Schedule of Ownership Interests (Details) [Line Items]    
Ownership as of the issuance date of the report 100.00%  
Subsidiary Four [Member]    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED) - Schedule of Ownership Interests (Details) [Line Items]    
Entity Name Waterside Inc. Colorado, United States of America (“Waterside Colorado”)  
Registered Location USA  
Incorporated date Sep. 22, 2022  
Subsidiary Four [Member] | ZK International [Member]    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED) - Schedule of Ownership Interests (Details) [Line Items]    
Ownership as of the issuance date of the report 100.00%  
Subsidiary Five [Member]    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED) - Schedule of Ownership Interests (Details) [Line Items]    
Entity Name Zhengkang International Hong Kong Limited (“ZK Hong Kong”)  
Registered Location Hong Kong  
Incorporated date Oct. 31, 2025  
Subsidiary Five [Member] | Waterside Colorado [Member]    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED) - Schedule of Ownership Interests (Details) [Line Items]    
Ownership as of the issuance date of the report 100.00%  
Subsidiary Six [Member]    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED) - Schedule of Ownership Interests (Details) [Line Items]    
Entity Name Shijiazhuang Zhongkang Technology Co.,Ltd (“Zhongkang Technology”)  
Registered Location People’s Republic of China  
Incorporated date Nov. 19, 2025  
Registered capital | ¥   ¥ 10,000,000
Subsidiary Six [Member] | ZK International [Member]    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED) - Schedule of Ownership Interests (Details) [Line Items]    
Ownership as of the issuance date of the report 100.00%  
Subsidiary Seven [Member]    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED) - Schedule of Ownership Interests (Details) [Line Items]    
Entity Name Shenzhen Likang Xinye Equipment Sales Co., Ltd (“Shenzhen Likang Xinye”)  
Registered Location People’s Republic of China  
Incorporated date Feb. 26, 2026  
Registered capital | ¥   ¥ 5,000,000
Subsidiary Seven [Member] | Zhongkang Technology [Member]    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED) - Schedule of Ownership Interests (Details) [Line Items]    
Ownership as of the issuance date of the report 100.00%