v3.22.2.2
Document And Entity Information - shares
 12 Months Ended
Sep. 30, 2021
Oct. 10, 2022
Document Information [Line Items]    
Document Type 20-F/A  
Amendment Description Amendment No. 3  
Document Registration Statement false  
Document Annual Report true  
Document Transition Report false  
Document Shell Company Report false  
Amendment Flag true  
Document Period End Date Sep. 30, 2021  
Document Fiscal Year Focus 2020  
Entity File Number 000-51576  
Entity Incorporation, State or Country Code D8  
Document Fiscal Period Focus FY  
Entity Address, Address Line One No. 21 Sheng Ming Yuan Road  
Entity Address, Address Line Two Changping District  
Entity Address, City or Town Beijing  
Entity Address, Postal Zip Code 102206  
Entity Address, Country CN  
Entity Registrant Name Origin Agritech Limited  
Entity Central Index Key 0001321851  
Current Fiscal Year End Date --09-30  
Entity Well-known Seasoned Issuer No  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Emerging Growth Company false  
Trading Symbol SEED  
Security Exchange Name NASDAQ  
Title of 12(b) Security Ordinary Shares  
Document Accounting Standard U.S. GAAP  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding 5,793,617 6,016,058
Business Contact [Member]    
Document Information [Line Items]    
Entity Address, Address Line One No. 21 Sheng Ming Yuan Road  
Entity Address, Address Line Two Changping District  
Entity Address, City or Town Beijing  
Entity Address, Postal Zip Code 102206  
City Area Code 86-10  
Local Phone Number 5890-7588  
Entity Address, Country CN  
Contact Personnel Name Dr. Han Gengchen  
Contact Personnel Fax Number 5890-7577