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STOCKHOLDERS' EQUITY (Details)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2019
USD ($)
$ / shares
shares
Stock options  
Outstanding at beginning of period | shares 424,800
Outstanding at end of period | shares 424,800
Exercisable at end of period | shares 414,467
Weighted average exercise price  
Outstanding at beginning of period | $ / shares $ 8.30
Outstanding at end of period | $ / shares 8.30
Exercisable at end of period | $ / shares $ 8.35
Weighted average remaining contractual term  
Outstanding at beginning of period 6 years 6 months
Outstanding at end of period 6 years 2 months 12 days
Exercisable at the end of period 6 years 2 months 12 days
Aggregate intrinsic value  
Outstanding at beginning of period | $ $ 22
Outstanding at end of period | $ 16
Exercisable at end of period | $ $ 16