Additional Balance Sheet Information (Tables)

9 Months Ended

Apr. 30, 2019

Additional Balance Sheet Information [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories as of April 30, 2019, and July 31, 2018, consisted of the following:

	April 30, 2019		July 31, 2018
Finished products	$	76,117	$	73,133
Work-in-process	22,240		19,903
Raw materials and supplies	21,538		20,035
Total inventories	$	119,895	$	113,071