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Fair Value Measurements (Tables)
6 Months Ended
Nov. 30, 2019
Fair Value Disclosures [Abstract]  
Schedule of Investments Measured at Fair Value on a Recurring Basis

Investments measured at fair value on a recurring basis subject to the disclosure requirements of ASC 820 as of November 30, 2019 were as follows (in thousands):

 

 

 

Level 1

 

CDs

 

 

13,000