STOCKHOLDERS' EQUITY (Details) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($) $ / shares shares
Stock options
Balance at beginning of period | shares	247,400
Granted | shares	262,000
Exercised | shares	(13,000)
Balance at end of period | shares	496,400
Exercisable at end of period | shares	226,066
Weighted average exercise price
Balance at beginning of period | $ / shares	$ 8.75
Granted | $ / shares	7.30
Exercised | $ / shares	4.53
Forfeited | $ / shares	8.10
Balance at end of period | $ / shares	$ 9.15
Weighted average remaining contractual term
Balance	8 years 1 month 6 days
Exercisable at the end of period	5 years 10 months 24 days
Aggregate intrinsic value
Balance at end of period | $	$ 293,790
Exercisable at end of period | $	$ 215,922