13. PRODUCT WARRANTIES

12 Months Ended

May 31, 2018

Product Warranties Disclosures [Abstract]

PRODUCT WARRANTIES

13. PRODUCT WARRANTIES:

    The Company provides for the estimated cost of product warranties at the time revenues are recognized on the products shipped. While the Company engages in extensive product quality programs and processes, including actively monitoring and evaluating the quality of its component suppliers, the Company’s warranty obligation is affected by product failure rates, material usage and service delivery costs incurred in correcting a product failure. Should actual product failure rates, material usage or service delivery costs differ from the Company’s estimates, revisions to the estimated warranty liability would be required.

    The standard warranty period is one year for systems and ninety days for parts and service.

    Following is a summary of changes in the Company’s liability for product warranties during the fiscal years ended May 31, 2018 and 2017 (in thousands):

	May 31,
	2018			2017
Balance at the beginning of the year	$	113		$	155
Accruals for warranties issued during the year		329			123
Accruals and adjustments (change in estimates) related to pre-existing warranties during the year		—			(54	)
Consumption of reserves		(307	)		(111	)
Balance at the end of the year	$	135		$	113

    The accrued warranty balance is included in accrued expenses on the consolidated balance sheets.