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10. CUSTOMER DEPOSITS AND DEFERRED REVENUE, SHORT-TERM (Tables)
3 Months Ended
Aug. 31, 2016
Customer Deposits And Deferred Revenue Short-term Tables  
Customer deposits and deferred revenue

    Customer deposits and deferred revenue, short-term (in thousands):

 

   August 31,  May 31,
   2016  2016
Customer deposits  $2,034   $540 
Deferred revenue   690    1,174 
   $2,724   $1,714