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Investments
9 Months Ended
Feb. 29, 2020
Investments Debt And Equity Securities [Abstract]  
Investments

6.  INVESTMENTS

As of February 29, 2020, we had $13.0 million invested in a CD which matures in less than twelve months. The fair value of the investment was equal to the face value of the CD.

As of June 1, 2019, we had $8.0 million invested in CDs which mature in less than twelve months. The fair value of these investments was equal to the face value of the CDs.