Product Warranties

12 Months Ended

Apr. 30, 2021

Product Warranties Disclosures [Abstract]

Product Warranty Disclosure [Text Block]

14.         Product Warranties

The Company generally provides its customers with a one-year warranty regarding the manufactured quality and functionality of its products.  For some limited products, the warranty period has been extended.  The Company establishes warranty reserves based on its product history, current information on repair costs and annual sales levels.  As of April 30, 2021 and 2020, respectively, changes in the carrying amount of accrued product warranty costs, reported in accrued expenses on the consolidated balance sheets, were as follows (in thousands):

	2021			2020
Balance at beginning of year	$	527		$	529
Warranty costs incurred		(619	)		(293	)
Product warranty accrual		531			291
Balance at end of year	$	439		$	527