Property, plant, and equipment (Tables)

12 Months Ended

Jul. 31, 2018

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment [Table Text Block]

At July 31, 2018 and 2017 property, plant, and equipment consist of:

	2018			2017
Building and building improvements	$	4,917		$	4,898
Machinery and equipment (includes asset under capital lease - see Note 9)		7,570			7,878
Office furniture and computer equipment		15,362			19,434
Leasehold improvements		5,262			5,389
		33,111			37,599
Accumulated depreciation and amortization		(26,187	)		(30,410	)
		6,924			7,189
Land and land improvements		712			712
	$	7,636		$	7,901