Inventories (Tables)

3 Months Ended

Jan. 31, 2013

Inventory Disclosure [Abstract]

Inventories

	January 31, 2013		April 30, 2012
Raw materials	$	1,779,951	$	1,921,151
Work in process		36,141		29,767
Finished goods		1,096,545		981,154
	$	2,912,637	$	2,932,072