STOCKHOLDERS' EQUITY (Details) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2017 USD ($) $ / shares shares
Stock options
Outstanding at beginning of period | shares	247,400
Granted | shares	262,000
Exercised | shares	(26,333)
Forfeited | shares	(47,267)
Outstanding at end of period | shares	435,800
Exercisable at end of period | shares	173,800
Weighted average exercise price
Outstanding at beginning of period | $ / shares	$ 8.75
Granted | $ / shares	7.30
Exercised | $ / shares	4.55
Forfeited | $ / shares	6.74
Outstanding at end of period | $ / shares	8.35
Exercisable at end of period | $ / shares	$ 9.94
Weighted average remaining contractual term
Outstanding at end of period	7 years 8 months 12 days
Exercisable at the end of period	5 years
Aggregate intrinsic value
Outstanding at end of period | $	$ 238,140
Exercisable at end of period | $	$ 138,580