Inventories (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Inventories
Raw materials	$ 2,060,334	$ 2,072,540
Work-in-progress	408,041	373,512
Finished goods	1,296,047	1,478,444
Reduction to LIFO cost	(1,248,724)	(1,245,632)
Total Inventory	$ 2,515,698	$ 2,678,864