INCOME TAXES - Composition of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Long-term deferred income tax assets (liabilities):
Trade receivables allowance	$ 36	$ 59
Inventory capitalization	1,142	890
Accrued expenses	4,248	4,153
Deferred compensation	701	794
Inventory reserves	1,501	1,211
State NOL Carryforwards	13	30
Share based compensation	3,983	2,434
Pension liability	13	12
Intangibles	(9,467)	(473)
Depreciation expense	(6,658)	(5,151)
Prepaid expenses	(500)	(1,955)
Deferred tax assets		$ 2,004
Deferred tax liabilities	$ 4,988