Inventory (Tables)

9 Months Ended

Sep. 30, 2012

Components of Inventory

Components of inventory are as follows:

	September 30, 2012		December 31, 2011
Finished goods	$	556,841	$	531,418
Work-in-process		230,127		210,459
Parts		2,945,707		2,739,335
		3,732,675		3,481,212
Less: Inventory reserves		162,676		150,439
Total inventory, net	$	3,569,999	$	3,330,773