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

Description of Business, Organization and Significant Concentrations and Risk - VIE Agreements - Additional Information (Details)

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Description of Business, Organization and Significant Concentrations and Risk - VIE Agreements - Additional Information (Details) - CNY (¥)
12 Months Ended
Mar. 15, 2018
Dec. 31, 2019
Mar. 19, 2019
Dec. 28, 2018
Mar. 31, 2018
ATA Education | ATA Intelligent Learning's nominee shareholders, Mr. Kevin Xiaofeng Ma, and Mr. Haichang Xiong          
Variable Interest Entity          
Loan amount   ¥ 10,000,000 ¥ 50,000,000   ¥ 10,000,000
Term of loan   10 years      
ATA Education | ATA Intelligent Learning's nominee shareholders, Mr. Kevin Xiaofeng Ma, and Mr. Haichang Xiong | Loan on March 15, 2018          
Variable Interest Entity          
Loan amount ¥ 1,000,000        
ATA Education | ATA Intelligent Learning's nominee shareholders, Mr. Kevin Xiaofeng Ma, and Mr. Haichang Xiong | Loan on December 28, 2018          
Variable Interest Entity          
Loan amount       ¥ 9,000,000  
ATA Education | ATA Intelligent Learning's nominee shareholders, Mr. Kevin Xiaofeng Ma, and Mr. Haichang Xiong | Loan Agreement On March192019          
Variable Interest Entity          
Loan amount   ¥ 40,000,000      
ATA Intelligent Learning          
Variable Interest Entity          
Registered capital   50,000,000      
Assets pledged or collateralized   ¥ 0      
ATA Intelligent Learning | ATA Education          
Variable Interest Entity          
Percentage of equity interest that can be acquired as per exclusive purchase option   100.00%      
Term of agreement 30 years        
Notice period prior to expiration of agreement   30 days      
ATA Intelligent Learning | ATA Education | Exclusive technical consulting and services agreement          
Variable Interest Entity          
Automatic renewal term of the agreement 10 years        
Notice period prior to expiration of agreement 3 months        
Mr. Kevin Xiaofeng Ma | ATA Intelligent Learning | Minimum          
Variable Interest Entity          
Legal ownership   50.00%      
Mr. Kevin Xiaofeng Ma | ATA Intelligent Learning          
Variable Interest Entity          
Legal ownership interest (as a percent)   90.00%      
Mr. Haichang Xiong | ATA Intelligent Learning          
Variable Interest Entity          
Legal ownership interest (as a percent)   10.00%