Property, Plant and Equipment (Detail Textuals) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Depreciation	$ 119,000	$ 114,000	$ 238,000	$ 227,000
Depreciation and amortization	155,000	149,000	308,000	296,000
Buildings
Property, Plant and Equipment [Line Items]
Accumulated amortization	2,617,000		2,617,000		2,552,000
Amortization expense	33,000	33,000	65,000	65,000
Machinery and equipment
Property, Plant and Equipment [Line Items]
Amortization expense	$ 0	$ 21,000	$ 0	$ 42,000