15. Product Warranties

12 Months Ended

Apr. 30, 2019

Product Warranties Disclosures [Abstract]

Product Warranty Disclosure [Text Block]

15. 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, 2019, and 2018, respectively, changes in the carrying amount of accrued product warranty costs, reported in accrued expenses on the consolidated balance sheet, were as follows (in thousands):

	2019			2018
Balance at beginning of year	$	520		$	557
Warranty costs incurred		(398	)		(40	)
Product warranty accrual		407			3
Balance at end of year	$	529		$	520