Inventories (Tables)

6 Months Ended

Jan. 31, 2018

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories consist of the following:

	January 31, 2018		July 31, 2017
Raw materials	$	809	$	852
Work in process		1,951		1,905
Finished products		4,721		4,290
	$	7,481	$	7,047