Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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PROPERTY AND EQUIPMENT (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
PROPERTY AND EQUIPMENT (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 53,553		$ 53,553		$ 53,364
Less accumulated depreciation	(36,966)		(36,966)		(36,033)
Total property and equipment, net	16,587		16,587		17,331
Depreciation and amortization	1,000	$ 1,000	2,100	$ 2,000
Operating leases, gross	10,500		10,500		10,800
Operating leases, accumulated depreciation	5,600		5,600		5,000
Operating leases, net	4,900		4,900		5,800
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	377		377		377
Building
Property, Plant and Equipment [Line Items]
Property and equipment, gross	2,978		2,978		2,868
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	39,131		39,131		38,432
Leasehold and building improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	9,866		9,866		8,156
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,201		$ 1,201		$ 3,531
Machinery and equipment \| Minimum
Property, Plant and Equipment [Line Items]
Property plant and equipment, useful life			5 years
Machinery and equipment \| Maximum
Property, Plant and Equipment [Line Items]
Property plant and equipment, useful life			7 years