Inventories (Tables)

9 Months Ended

Sep. 30, 2013

Inventories

Schedule of inventories

	September 30,2013		December 31, 2012
Finished products	$	1,460,625	$	1,554,203
Work-in-process	1,840,414		1,599,761
Raw materials	3,701,199		3,191,018
	$	7,002,238	$	6,344,982