PROPERTY (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2009
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 40,890,000	$ 39,405,000
Less accumulated depreciation	12,433,000	11,410,000
Property, net	28,457,000	27,995,000
Depreciation expense	3,430,000	3,532,000
Impairment of property, plant and equipment	1,069,000	906,000
Lake Charles Facility [Member]
Property, Plant and Equipment [Line Items]
Impairment of property, plant and equipment	1,100,000	600,000	2,300,000
Machinery and equipment not currently in use, net realizable value	1,400,000
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	403,000	420,000
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	358,000	363,000
Furniture and Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years
Furniture and Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	10 years
Plant [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	14,362,000	14,122,000
Plant [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	25 years
Plant [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	30 years
Computer and Software [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,407,000	1,352,000
Computer and Software [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	3 years
Computer and Software [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years
Idled Facility [Member] | Lake Charles Facility [Member]
Property, Plant and Equipment [Line Items]
Net book value of idled facility	1,700,000
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	189,000	189,000
Leasehold Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	3 years
Leasehold Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	7 years
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	15,053,000	17,249,000
Machinery and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years
Machinery and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	10 years
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 9,118,000	$ 5,710,000