5. INVENTORIES (Tables)

6 Months Ended

Oct. 31, 2016

Inventory Disclosure [Abstract]

Schedule of inventories

	October 31, 2016		April 30, 2016
Raw materials	$	11,696,000	$	10,911,000
Work-in-process		14,228,000		5,275,000
Total inventories	$	25,924,000	$	16,186,000