Inventories (Tables)

12 Months Ended

Jul. 31, 2016

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories consisted of the following at July 31:

	2016		2015
Raw materials	$	951	$	1,013
Work in process		1,755		2,002
Finished products		4,265		4,381
	$	6,971	$	7,396