EARNINGS PER SHARE - Components of Numerator and Denominator for Computation of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Numerator:
Net income attributable to common shareholders - Basic	$ 1,539	$ 4,850	$ 3,181	$ 2,840
Interest on Convertible Notes	0	0	0	694
Gain on derivative liability	0	0	0	(1,581)
Net income attributable to common shareholders - Diluted	$ 1,539	$ 4,850	$ 3,181	$ 1,953
Denominator:
Weighted average common shares - Basic (shares)	35,652,000	35,651,000	35,727,000	34,269,000
Effective of diluted shares:
Share-based awards (shares)	180,000	370,000	232,000	522,000
Convertible Notes (shares)	0	0	0	1,459,030
Weighted average common shares - Diluted (shares)	35,832,000	36,021,000	35,959,000	36,250,000
Net income per share attributable to common shareholders - Basic (in dollars per share)	$ 0.04	$ 0.14	$ 0.09	$ 0.08
Net income per share attributable to common shareholders - Diluted (in dollars per share)	$ 0.04	$ 0.13	$ 0.09	$ 0.05