INCOME TAXES - Deferred Tax Assets and Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred tax assets:
Income tax credit carryforward	$ 50	$ 584
Net foreign operating loss carryforward	5,396	6,019
Inventory differences	2,424	1,451
Allowance for doubtful accounts	105	113
Equity compensation	556	1,703
Vacation and other compensation accrual	374	420
Deferred Tax Assets, Investment in Subsidiaries	1,154	0
Other, net	175	21
Deferred tax assets	10,234	10,311
Deferred tax liabilities:
Purchased intangible assets	(12,445)	(13,257)
Depreciation and amortization	(2,315)	(2,097)
Investment in partnerships	0	(1,129)
Deferred profit	(244)	(236)
Other, net	0	(74)
Deferred tax liabilities	(15,004)	(16,793)
Net deferred tax liabilities	(4,770)	(6,482)
Classification of deferred tax assets and liabilities
Current deferred tax assets	3,507	2,074
Current deferred tax liabilities	(435)	(149)
Long-term deferred tax assets	505	804
Long-term deferred tax liabilities	(8,347)	(9,211)
Net deferred tax liabilities	$ (4,770)	$ (6,482)