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STOCK-BASED COMPENSATION (Details 1) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Stock options    
Outstanding at beginning of period 247,400 344,733
Granted 262,000 27,000
Exercised (26,333)  
Forfeited (47,267) (124,333)
Outstanding at end of period 435,800 247,400
Exercisable at end of period 173,800  
Weighted average exercise price    
Outstanding at beginning of period $ 8.75 $ 9.35
Granted 7.30 3.68
Exercised 4.55  
Forfeited 6.74 9.31
Outstanding at end of period 8.35 $ 8.75
Exercisable at end of period $ 9.94  
Weighted average remaining contractual term    
Balance 7 years 6 months 5 years 10 months 24 days
Granted 9 years 2 months 12 days 9 years 2 months 12 days
Forfeited 6 years 9 months 18 days 5 years 10 months 24 days
Outstanding at end of period 7 years 6 months 5 years 10 months 24 days
Exercisable at the end of period 4 years 9 months 18 days  
Aggregate intrinsic value    
Outstanding at beginning of period $ 135 $ 107
Granted   28
Exercised 81  
Outstanding at end of period 216 $ 135
Exercisable at end of period $ 135