5. INVENTORIES (Tables)

9 Months Ended

Jan. 31, 2015

Inventory Disclosure [Abstract]

Schedule of inventories

	January 31, 2015		April 30, 2014
Raw materials	$	3,105,000	$	2,370,000
Work-in-process		3,043,000		3,160,000
Total inventories	$	6,148,000	$	5,530,000