7. Property, Plant and Equipment and Leases (Tables)

12 Months Ended

Apr. 30, 2019

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment [Table Text Block]

Property, plant and equipment at April 30, 2019 and 2018, consisted of the following (in thousands):

	2019			2018
Buildings and building improvements	$	2,692		$	2,790
Machinery, equipment and furniture		57,157			57,503
		59,849			60,293
Less, accumulated depreciation		(46,811	)		(46,166	)
	$	13,038		$	14,127

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

Future non-cancelable minimum lease payments required by the operating leases for the years ended April 30 were as follows (in thousands):

For the years ending April 30,	Operating Leases
2020	$	1,316
2021		1,521
2022		1,436
2023		1,469
2024		1,502
Thereafter		6,349
Total future minimum lease payments	$	13,593