Property, Plant and Equipment (Details Textuals) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Depreciation	$ 111,000	$ 111,000	$ 228,000	$ 220,000
Depreciation and amortization	169,000	166,000	340,000	331,000
Buildings
Property, Plant and Equipment [Line Items]
Accumulated amortization	2,487,000		2,487,000		2,423,000
Amortization	33,000	33,000	65,000	65,000
Machinery and equipment
Property, Plant and Equipment [Line Items]
Accumulated amortization	224,000		224,000		182,000
Amortization	$ 21,000	$ 21,000	$ 42,000	$ 42,000