PROPERTY, PLANT AND EQUIPMENT, NET (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	$ 163,804	$ 157,304
Accumulated depreciation	(119,872)	(113,809)
Property, plant and equipment, net	43,932	43,495
Depreciation expense	11,800	14,000
Land [Member]
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	2,251	2,259
Buildings and Improvements [Member]
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	30,119	30,761
Machinery and Equipment [Member]
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	126,747	122,773
Construction in Progress [Member]
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	$ 4,687	$ 1,511

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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-Publisher FASB
-Name Accounting Standards Codification
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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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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.

+ References

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

+ References

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