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SHARE-BASED PAYMENTS - Fair value of share options (Details)
1 Months Ended
Dec. 31, 2019
USD ($)
Y
$ / shares
SHARE-BASED PAYMENTS  
Weighted average fair value of shares (per option)) $ 5.42
Exercise price of the stock options, granted during the period $ 4.55
Expected volatility 29.69%
Expected dividend rate 0.00%
Risk-free interest rate 1.66%
Weighted average expected life of stock options | Y 9.89
Weighted average fair value at measurement date (per option) | $ $ 2.47
Estimates of options that will be exercised (as a percent) 100.00%