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SHARE-BASED COMPENSATION - Summary of Stock options activity (Details) - Stock options
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2019
USD ($)
$ / shares
shares
Number of units  
Awards granted | shares 59,000
Outstanding at the end | shares 59,000
Exercisable | shares 7,000
Weighted Average Exercise Price  
Granted (in dollars per share) $ 13.63
Outstanding at the end (in dollars per share) 13.63
Exercisable (in dollars per share) 13.63
Weighted Average Fair Value  
Granted (in dollars per share) 7.69
Outstanding at the end (in dollars per share) 7.69
Exercisable (in dollars per share) $ 7.69
Weighted Average Remaining Contractual Life and Intrinsic Value  
Granted (in years) 9 years 1 month 6 days
Outstanding at the end (in years) 9 years 1 month 6 days
Exercisable (in years) 9 years 1 month 6 days
Outstanding at the end (in dollars) | $ $ 177
Exercisable (in dollars) | $ $ 22
Non-vested shares | shares 51,000
Unrecognized compensation expense | $ $ 344
Unrecognized compensation expense, recognition period 6 years 1 month 10 days