Quarterly report pursuant to Section 13 or 15(d)

SHARE-BASED COMPENSATION - Narrative (Details)

v3.10.0.1
SHARE-BASED COMPENSATION - Narrative (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
May 31, 2018
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based compensation expense   $ 175 $ 176 $ 407 $ 269
Stock options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized compensation cost   $ 400   $ 400  
Weighted-average period of unrecognized compensation cost expected to be recognized       1 year  
2015 Equity Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares available for grant (in shares)   961,225   961,225  
2015 Equity Incentive Plan | Non-executive Members of the Board of Directors | Restricted Shares          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Restricted shares issued to non-executive members of the Board of Directors (in shares) 17,910        
Transfer restriction period 1 year