8. PRODUCT WARRANTIES (Tables)

6 Months Ended

Nov. 30, 2016

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, 2016 and 2015 (in thousands):

	Three Months Ended						Six Months Ended
	November 30,						November 30,
	2016			2015			2016			2015
Balance at the beginning of the period	$	90		$	219		$	155		$	137
Accruals for warranties issued during the period		11			128			11			237
Accruals and adjustments (change in estimates) related to pre-existing warranties during the period		—			—			(54	)		—
Settlement made during the period (in cash or in kind)		(29	)		(42	)		(40	)		(69	)
Balance at the end of the period	$	72		$	305		$	72		$	305