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Debt (Tables)
3 Months Ended
Aug. 31, 2017
Debt Disclosure [Abstract]  
Schedule of Debt
The following table summarizes the carrying value of the Company's debt as of the dates indicated:
 
August 31, 2017
 
May 31, 2017
 
August 31, 2016
Revolving Loan (interest rates of n/a)
$

 
$

 
$

Unsecured short term lines of credit (weighted average interest rates of 3.8%, 4.1% and 4.1%, respectively)
12.0

 
6.2

 
12.1

Total debt
$
12.0

 
$
6.2

 
$
12.1