PROPERTY, PLANT AND EQUIPMENT (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	$ 99,154,000	$ 97,550,000
Accumulated depreciation	(64,166,000)	(58,136,000)
Property, plant and equipment, net	34,988,000	39,414,000
Depreciation expense	8,100,000	8,000,000	8,300,000
Land [Member]
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	3,234,000	3,396,000
Buildings and Improvements [Member]
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	23,579,000	24,844,000
Machinery and Equipment [Member]
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	69,987,000	67,823,000
Construction in Progress [Member]
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	2,340,000	1,487,000
Assets Held for Sale [Member]
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	$ 14,000	$ 0