INCOME TAXES (Details.) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
INCOME TAXES
Deferred tax assets, net of valuation allowance	$ 3,154
Net operating loss (NOL) carryforwards	10,200
Alternative minimum tax credits was reclassified to current tax receivable	$ 1,600
Expiration period from date of origination for net operating loss carryforwards	20 years
Annual limitation for usage of NOL	$ 2,000
Annual limitation for usage of tax credits	420
Deferred tax expense	$ 811	$ 842