SHAREHOLDERS' EQUITY - OPTIONS ROLLFORWARD (Details) - Amended and Restated 2009 Stock Incentive Plan - Stock options, employees and directors - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Number of options
Options outstanding at beginning of period	1,249,898
Options outstanding at end of period	1,249,898	1,249,898
Options vested and expected to be vested at end of period	1,244,200
Options vested at end of period	704,647
Weighted average exercise price per share
Options outstanding at beginning of period (in dollars per share)	$ 4.39
Options outstanding at end of period ( in dollars per share)	4.39	$ 4.39
Options vested and expected to be vested at end of period (in dollars per share)	4.39
Options vested at end of period (in dollars per share)	$ 3.93
Weighted average remaining contractual term
Weighted average remaining contractual life, Outstanding	5 years 6 months 11 days	5 years 9 months 11 days
Weighted average remaining contractual life, Vested and expected to be vested	5 years 6 months 7 days
Weighted average remaining contractual life, Vested	4 years 4 months 2 days
Aggregate intrinsic value
Aggregate intrinsic value, Outstanding at the beginning of the period	$ 8,990
Aggregate intrinsic value, Outstanding at the end of the period	6,670	$ 8,990
Aggregate intrinsic value, Vested and expected to be vested	6,670
Aggregate intrinsic value, Vested	$ 6,670