L. INCOME TAXES - UNRECOGNIZED TAX BENEFIT (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Unrecognized tax benefits - January 1	$ 1,797	$ 1,659
Gross increases - tax positions in prior period		332
Gross decreases - tax positions in prior period	1,616	194
Unrecognized tax benefits - December 31	181	$ 1,797
Increase in deferred tax assets	$ 1,600