INCOME TAXES - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Net operating loss carryforward	$ 9,138	$ 8,843
Inventory differences	721	695
Equity compensation	1,203	952
Investment in subsidiaries	2,300	2,861
Restructuring	7	12
Purchased goodwill	1,807	2,516
Accrued employee compensation and benefits	2,945	1,459
Lease liabilities	2,259
Other, net	134	57
Gross deferred tax assets	20,514	17,395
Less valuation allowances	(9,680)	(9,143)
Total deferred tax assets	10,834	8,252
Deferred tax liabilities:
Purchased intangible assets and goodwill	(987)	(1,566)
Depreciation and amortization	(7,366)	(2,783)
Right of use assets	(1,997)
Other, net	(434)	(281)
Total deferred tax liabilities	(10,784)	(4,630)
Net deferred tax assets	$ 50	$ 3,622