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Operating Loss Carry forwards (Detail)
$ in Thousands
 12 Months Ended
May 31, 2020
USD ($)
Operating Loss Carryforwards [Line Items]  
Operating Loss Carryforwards $ 1,762
U.S.  
Operating Loss Carryforwards [Line Items]  
Operating Loss Carryforwards $ 408
Operating Loss Carryforwards Expiration Description 2037 to indefinite
Foreign  
Operating Loss Carryforwards [Line Items]  
Operating Loss Carryforwards $ 1,354
Operating Loss Carryforwards Expiration Description 2024 to 2039