STOCK BASED COMPENSATION - Option Pricing (Details) shares in Thousands	12 Months Ended
	Dec. 31, 2017 $ / shares shares
Exercise price ranges
Number Outstanding (in shares) | shares	7
Weighted Average Remaining Contractual Life	4 years 5 months 16 days
Number Exercisable | shares	7
Weighted Average Exercise Price (in dollars per share)	$ 4.12
$1.56
Exercise price ranges
Exercise price range, upper limit (in dollars per share)	$ 1.56
Number Outstanding (in shares) | shares	4
Weighted Average Remaining Contractual Life	3 months 7 days
Weighted Average Exercise Price (in dollars per share)	$ 1.56
Number Exercisable | shares	4
Weighted Average Exercise Price (in dollars per share)	$ 1.56
$7.40
Exercise price ranges
Exercise price range, upper limit (in dollars per share)	$ 7.40
Number Outstanding (in shares) | shares	3
Weighted Average Remaining Contractual Life	9 years 10 months 2 days
Weighted Average Exercise Price (in dollars per share)	$ 7.40
Number Exercisable | shares	3
Weighted Average Exercise Price (in dollars per share)	$ 7.40