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14. PRODUCT WARRANTIES (Tables)
12 Months Ended
May 31, 2020
Product Warranties Disclosures [Abstract]  
Liability for product warranties

    Following is a summary of changes in the Company’s liability for product warranties during the fiscal years ended May 31, 2020 and 2019 (in thousands):

 

   May 31,
   2020  2019
       
Balance at the beginning of the year  $154   $135 
Accruals for warranties issued during the year   299    214 
Consumption of reserves   (207)   (195)
           
Balance at the end of the year  $246   $154