INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
INCOME TAXES
Deferred tax assets, net of valuation allowance	$ 8,523	$ 10,332	$ 9,213
Net operating loss (NOL) carryforwards	11,200
Tax credit carryforwards	$ 2,300
Expiration period from date of origination for net operating loss carryforwards	20 years
Annual limitation for usage of NOL	$ 1,404
Annual limitation for usage of tax credits	476
Deferred tax expense (benefit)	$ 585	$ 712