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COMMITMENTS AND CONTINGENCIES, FUTURE MINIMUM RENT COMMITMENTS (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Future minimum rent commitments        
2019 $ 243   $ 243  
2020 375   375  
2021 386   386  
2022 398   398  
Thereafter 339   339  
Total 1,741   1,741  
Commitments        
Total rent expense $ 224 $ 287 640 $ 555
Gain on lease assignment     $ 603