Inventories (Tables)

9 Months Ended

Jan. 31, 2015

Inventory Disclosure [Abstract]

Inventories

	January 31, 2015		April 30, 2014
Raw materials	$	1,637,739	$	1,576,238
Work in process		28,432		63,631
Finished goods		601,995		651,169
	$	2,268,166	$	2,291,038