Property, Plant and Equipment, Net (Tables)

12 Months Ended

Apr. 30, 2021

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment [Table Text Block]

Property, plant and equipment, net at April 30, 2021 and 2020, consisted of the following (in thousands):

	April 30, 2021			April 30, 2020
Buildings and building improvements	$	2,721		$	2,692
Machinery, equipment and furniture		59,136			57,916
		61,857			60,608
Less accumulated depreciation		(52,245	)		(49,341	)
	$	9,612		$	11,267