Property, Plant and Equipment (Details Textual) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment (Textual) [Abstract]
Deferred gain on sale of machinery and equipment	$ 663,000
Property, Plant and Equipment (Additional Textual) [Abstract]
Accumulated depreciation associated with capital lease asset	952,000	774,000
Accruals related to the purchase of property, plant and equipment	0	3,200,000
Machinery and equipment [Member]
Property, Plant and Equipment (Textual) [Abstract]
Capital lease transaction	1,300,000
Deferred gain on sale of machinery and equipment	$ 158,000	$ 252,000