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

LONG-TERM INVESTMENTS - Available-for-sale Investment (Details)

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LONG-TERM INVESTMENTS - Available-for-sale Investment (Details)
1 Months Ended 9 Months Ended 12 Months Ended
Apr. 28, 2016
USD ($)
Mar. 30, 2016
USD ($)
Apr. 28, 2016
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2017
CNY (¥)
Mar. 31, 2017
CNY (¥)
Dec. 31, 2018
CNY (¥)
Mar. 31, 2017
USD ($)
Mar. 31, 2017
CNY (¥)
Mar. 24, 2016
USD ($)
Available-for-sale investment                    
Interest income | ¥           ¥ 568,320        
Unrealized holding loss of available-for-sale investment reported in other comprehensive income (loss) | ¥           ¥ 553,870        
Available-for-sale securities, fair value to amortized cost basis                    
Net book value | ¥         ¥ 0   ¥ 0      
Convertible promissory note ("the Notes")                    
Available-for-sale securities, fair value to amortized cost basis                    
Aggregate fair value               $ 1,504,000 ¥ 10,376,547  
Impairment loss of convertible bond       $ 1,504,000 ¥ 10,458,538          
Available-for-sale investment | Brilent Inc. ("Brilent") | Convertible promissory note ("the Notes")                    
Available-for-sale investment                    
Maximum amount of investments allowed for purchase | $                   $ 2,500,000
ATA BVI | Available-for-sale investment | Brilent Inc. ("Brilent") | Convertible promissory note ("the Notes")                    
Available-for-sale investment                    
Principal amount of investments | $ $ 1,200,000 $ 300,000 $ 1,200,000              
Interest rate per annum (as a percent) 6.00% 6.00%                
Cash consideration | $     $ 1,500,000              
Term of investments 24 months 24 months                
Amount converted to, as a percentage of qualified financing security purchase price 75.00% 75.00%