9. PRODUCT WARRANTIES (Tables)

6 Months Ended

Nov. 30, 2018

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 six months ended November 30, 2018 and 2017 (in thousands):

	Three Months Ended						Six Months Ended
	November 30,						November 30,
	2018			2017			2018			2017
Balance at the beginning of the period	$	160		$	119		$	135		$	113
Accruals for warranties issued during the period		71			152			146			246
Consumption of reserves		(68	)		(138	)		(118	)		(226	)
Balance at the end of the period	$	163		$	133		$	163		$	133