Property, plant, and equipment (Tables)

12 Months Ended

Jul. 31, 2020

Property, Plant and Equipment [Abstract]

Schedule of property, plant, and equipment

	2020			2019
Building and building improvements	$	10,089		$	10,334
Machinery and equipment (includes assets under finance leases - see Note 9)		8,548			8,538
Office furniture and computer equipment		16,578			16,229
Leasehold improvements		5,377			5,270
		40,592			40,371
Accumulated depreciation and amortization		(28,172	)		(28,179	)
		12,420			12,192
Land and land improvements		2,062			2,062
	$	14,482		$	14,254