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

INCOME TAXES (Details)

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INCOME TAXES (Details)
3 Months Ended 9 Months Ended 12 Months Ended 27 Months Ended 36 Months Ended 111 Months Ended
Mar. 31, 2018
Jun. 29, 2017
Dec. 31, 2017
Mar. 31, 2017
USD ($)
Mar. 31, 2016
CNY (¥)
Mar. 31, 2015
Mar. 31, 2017
USD ($)
Dec. 31, 2016
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2011
Dec. 31, 2010
Mar. 31, 2017
USD ($)
Mar. 31, 2017
CNY (¥)
Income Taxes                            
Statutory income tax rate (as a percent)       25.00% 25.00% 25.00%                
Withholding tax related to distributable earnings                           ¥ 22,620,872
Undistributed earnings generated by the PRC consolidated entities                           226,208,715
Deferred income tax liabilities       $ 3,286,389     $ 3,286,389           $ 3,286,389 ¥ 22,620,872
Unrecognized deferred income tax liability         ¥ 17,856,205                  
PRC                            
Income Taxes                            
Statutory income tax rate (as a percent)       25.00%                 25.00%  
Preferential tax rate as a high and new technology enterprise (as a percent)       15.00%                    
Withholding tax rate for dividends distributed by a PRC-resident enterprise to its immediate holding company outside the PRC (as a percent)       10.00%                    
PRC | ATA Testing                            
Income Taxes                            
Preferential tax rate as a high and new technology enterprise (as a percent)               15.00%   15.00%   15.00%    
PRC | ATA Testing | Future                            
Income Taxes                            
Preferential tax rate as a high and new technology enterprise (as a percent)   15.00%                        
Renewed term of HNTE certificate   3 years                        
PRC | ATA Learning                            
Income Taxes                            
Preferential tax rate as a high and new technology enterprise (as a percent)             15.00%   15.00%   15.00%      
PRC | ATA Learning | Future                            
Income Taxes                            
Statutory income tax rate (as a percent) 25.00%                          
Preferential tax rate as a high and new technology enterprise (as a percent)     15.00%                      
PRC | ATA Online                            
Income Taxes                            
Preferential tax rate as a high and new technology enterprise (as a percent)             15.00%   15.00%   15.00%      
PRC | ATA Online | Future                            
Income Taxes                            
Statutory income tax rate (as a percent) 25.00%                          
Preferential tax rate as a high and new technology enterprise (as a percent)     15.00%                      
PRC | ATA Data                            
Income Taxes                            
Preferential tax rate as a high and new technology enterprise (as a percent)             15.00%   15.00%   15.00%      
PRC | ATA Data | Future                            
Income Taxes                            
Statutory income tax rate (as a percent) 25.00%                          
Preferential tax rate as a high and new technology enterprise (as a percent)     15.00%                      
PRC | Zhongxiao Zhixing                            
Income Taxes                            
Statutory income tax rate (as a percent)       25.00%                    
PRC | Puhua Technology                            
Income Taxes                            
Statutory income tax rate (as a percent)       25.00%