Property, Plant and Equipment (Tables)

12 Months Ended

Jul. 31, 2021

Property, Plant and Equipment [Abstract]

Property, plant, and equipment

Property, plant and equipment consist of the following at July 31, 2021 and 2020:

	2021		2020
Machinery and equipment	$	170,600,000	156,314,000
Leasehold improvements	15,726,000		15,596,000
	186,326,000		171,910,000
Less accumulated depreciation and amortization	151,040,000		144,873,000
Property, plant and equipment, net	$	35,286,000	27,037,000