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

Share-based Compensation - Additional Information (Details)

v3.20.1
Share-based Compensation - Additional Information (Details)
1 Months Ended 9 Months Ended 12 Months Ended
Oct. 26, 2018
shares
Dec. 30, 2016
shares
Jan. 07, 2008
shares
Mar. 31, 2019
$ / shares
shares
Jan. 31, 2019
$ / shares
shares
Dec. 31, 2018
shares
Nov. 30, 2018
$ / shares
shares
Jul. 31, 2018
shares
Aug. 31, 2017
$ / shares
shares
Jan. 31, 2017
$ / shares
shares
Dec. 31, 2017
USD ($)
$ / shares
shares
Dec. 31, 2019
USD ($)
$ / shares
shares
Dec. 31, 2018
CNY (¥)
shares
Dec. 31, 2018
USD ($)
$ / shares
shares
Dec. 31, 2019
CNY (¥)
shares
Oct. 31, 2007
shares
Apr. 30, 2005
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                  
Compensation costs accelerated and recognized | ¥                         ¥ 877,321        
ATA Online                                  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                  
Compensation costs accelerated and recognized | ¥                         ¥ 6,753,771        
Options                                  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                  
Granted (in shares)                     50,000 70,000 1,053,150 1,053,150      
Granted (in dollars per share) | $ / shares                     $ 2.35 $ 0.50   $ 0.58      
Options cancelled (in shares)             1,772,584           1,901,752 1,901,752      
Vested cancelled (in shares)             1,215,114                    
Total unrecognized compensation expense | ¥                             ¥ 331,885    
Weighted average period over which unrecognized compensation expense is expected to be recognized                       2 years 9 months 10 days          
Options | ATA Online                                  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                  
Options cancelled (in shares)               129,168                  
Options | Employees and officers                                  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                  
Vesting rate (as a percent)       75.00% 75.00%   75.00%     75.00%              
Vesting period for remaining 75% shares       36 months 36 months   36 months     36 months              
Vesting rate on the first anniversary (as a percent)                   25.00%              
Granted (in shares)       20,000 50,000 1,772,584 690,000     900,000              
Granted (in dollars per share) | $ / shares       $ 0.532 $ 0.4868   $ 0.578     $ 1.705              
Vesting rate at the end of each year from the grant date over 4 years (as a percent)       25.00% 25.00%   25.00%                    
Vested immediately on the grant date (in shares)           1,412,336                      
Options | Employee                                  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                  
Vesting rate (as a percent)                 75.00%                
Vesting period for remaining 75% shares                 36 months                
Vesting rate on the first anniversary (as a percent)                 25.00%                
Granted (in shares)             363,150   50,000                
Granted (in dollars per share) | $ / shares                 $ 2.35                
Options | Certain employee and officer                                  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                  
Vesting period             4 years                    
Share options issued (in shares)             1,452,600                    
Non-vested shares                                  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                  
Non-vested shares granted                         2,572,584 2,572,584      
Nonvested cancelled (in shares)             557,470           1,262,250 1,262,250      
Total unrecognized compensation expense | ¥                             ¥ 2,077,009    
Weighted average period over which unrecognized compensation expense is expected to be recognized                       2 years 2 months 1 day          
Additional disclosures                                  
Total fair value of shares vested | $                     $ 148,500 $ 461,309   $ 2,591,875      
Number of vested shares withheld upon vesting to satisfy the minimum tax withholding obligation                     11,252 28,456 93,496 93,496      
Non-vested shares | ATA Online                                  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                  
Nonvested cancelled (in shares)               1,262,250                  
Non-vested shares | Employees and officers                                  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                  
Vesting period                   4 years              
Non-vested shares granted                   2,700,000              
Non-vested shares | Directors                                  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                  
Vesting rate (as a percent)             75.00%                    
Vesting period for remaining 75% shares             36 months                    
Non-vested shares granted             800,000                    
Vesting rate on the first anniversary (as a percent)             25.00%                    
Grant date over 4 years | Non-vested shares | Employees and officers                                  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                  
Vesting rate (as a percent)                   25.00%              
2005 Share incentive plan                                  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                  
Shares authorized                               3,310,300 2,894,000
2005 Share incentive plan | Options                                  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                  
Expiration term                       10 years          
2005 Share incentive plan | Vesting on first anniversary | Options                                  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                  
Vesting rate (as a percent)                       25.00%          
2005 Share incentive plan | Vesting ratably over following 36 months | Options                                  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                  
Vesting rate (as a percent)                       75.00%          
2008 Share incentive plan                                  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                  
Shares authorized   5,726,763 336,307                            
Annual increase in shares reserved (as a percent)     1.00%                            
Annual increase in shares reserved (in shares)     336,307                            
Expiration term   10 years 10 years                            
2008 Share incentive plan | Options                                  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                  
Expiration term                       10 years          
2008 Share incentive plan | Non-vested shares                                  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                  
Vesting period for remaining 75% shares                       36 months          
Vesting period                       4 years          
2008 Share incentive plan | Vesting on first anniversary | Options                                  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                  
Vesting rate (as a percent)                       25.00%          
2008 Share incentive plan | Vesting ratably over following 36 months | Options                                  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                  
Vesting rate (as a percent)                       75.00%          
2008 Share incentive plan | Grant date over 4 years | Non-vested shares                                  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                  
Vesting rate (as a percent)                       25.00%          
Amendment and Restatement of 2008 Plan                                  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                  
Annual increase in shares reserved (as a percent) 1.00%                                
Common shares reserved for issuance 6,965,846                                
Second Amendment and Restatement of 2008 Plan                                  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                                  
Common shares reserved for issuance                             7,423,815