XML 118 R83.htm IDEA: XBRL DOCUMENT v3.20.1
(LOSS) / INCOME PER SHARE - Shares Excluded From the Calculation of Diluted Loss Per Share (Details) - shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Share options      
Shares excluded from the calculation of diluted loss per share      
Shares excluded from the calculation of diluted loss per share 204,700 619,650 890,500
Nonvested shares      
Shares excluded from the calculation of diluted loss per share      
Shares excluded from the calculation of diluted loss per share 460,000 548,780 1,084,284
Convertible promissory notes      
Shares excluded from the calculation of diluted loss per share      
Shares excluded from the calculation of diluted loss per share   88,883,116 0