STOCK BASED COMPENSATION - Stock Options (Details) - Stock Options - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Stock Options
Expiration period	10 years
Shares
Options outstanding at the beginning of the period (in shares)	11
Exercised (in shares)	(6)
Cancelled or expired (in shares)	(1)
Options outstanding at the end of the period (in share)	4	11
Options exercisable at the end of the period (in shares)	4
Weighted Average Exercise Price
Options outstanding at the beginning of the period (in dollars per share)	$ 3.75
Exercised (in dollars per share)	4.96
Cancelled or expired (in dollars per share)	4.80
Options outstanding at the end of the period (in dollars per share)	1.56	$ 3.75
Options exercisable at the end of the period (in dollars per share)	$ 1.56
Weighted Average Remaining Contractual Life
Options outstanding	6 months 7 days	7 months 24 days
Options exercisable	6 months 7 days
Aggregate Intrinsic value of options outstanding	$ 21	$ 37
Aggregate Intrinsic value of options exercisable	$ 21
Stock price	$ 6.87	$ 7.02