Summary of Significant Accounting Policies Inventories (Tables)

12 Months Ended

Jul. 31, 2019

Inventories [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories consist of the following as of July 31:

	2019		2018
Finished products	$	77,532	$	73,133
Work-in-process	20,515		19,903
Raw materials and supplies	21,990		20,035
Total inventories	$	120,037	$	113,071