8. PRODUCT WARRANTIES (Tables)

9 Months Ended

Feb. 29, 2020

Product Warranties Disclosures [Abstract]

Liability for product warranties

    The following is a summary of changes in the Company's liability for product warranties during the three and nine months ended February 29, 2020 and February 28, 2019 (in thousands):

	Three Months Ended						Nine Months Ended
	February 29,			February 28,			February 29,			February 28,
	2020			2019			2020			2019
Balance at the beginning of the period	$	190		$	163		$	154		$	135
Accruals for warranties issued during the period		26			30			167			176
Consumption of reserves		(30	)		(30	)		(135	)		(148	)
Balance at the end of the period	$	186		$	163		$	186		$	163