INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
INCOME TAXES
Deferred tax assets, net of valuation allowance	$ 7,651		$ 8,760
Net operating loss (NOL) carryforwards	9,100
Tax credit carryforwards	$ 2,200
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)	$ 889	$ 585