INCOME TAXES - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Goodwill	$ 0	$ 2,668
Allowance for doubtful accounts	1,948	1,707
Inventories	2,944	2,365
Accruals	576	0
Research and development credit carryforward	775	1,115
Foreign tax credit carryforward	64	64
Charitable contribution carryforward	0	559
Net operating loss carryforward	610	136
Capital loss carryforward	12,564	12,225
Deferred compensation	538	475
Other accruals	0	266
Other	137	65
Total deferred tax assets	20,156	21,645
Less valuation allowance	(12,564)	(12,220)
Total deferred tax asset, net of valuation deferred tax liabilities :	7,592	9,425
Goodwill	(1,053)	0
Intangibles	(7,820)	(8,695)
Accruals	0	(61)
Property and equipment	(6,807)	(6,860)
Unremitted foreign earnings	(421)	(354)
Cumulative translation adjustment	0	(67)
Other	(124)	(457)
Net deferred tax liability	$ (8,633)	$ (7,069)