Additional Balance Sheet Information (Tables)

6 Months Ended

Jan. 31, 2019

Additional Balance Sheet Information [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories as of January 31, 2019, and July 31, 2018, consisted of the following:

	January 31, 2019		July 31, 2018
Finished products	$	76,571	$	73,133
Work-in-process	21,245		19,903
Raw materials and supplies	20,703		20,035
Total inventories	$	118,519	$	113,071