Stock-Based Compensation (Tables)
9 Months Ended
Feb. 28, 2014
Non-Qualified Stock Options
 
Assumptions to Value Stock Options

The following assumptions were used to value these stock options:

 

Dividend yield

     2.28 % 

Expected volatility

     52.23 % 

Risk-free interest rate

     1.69 % 

Expected term (years)

     6.0   
Market-Based Restricted Common Shares
 
Assumptions to Value Stock Options

The following assumptions were used to determine the grant-date fair value and the derived service period for these restricted common shares:

 

Dividend yield

     2.28 % 

Expected volatility

     53.40 % 

Risk-free interest rate

     1.41 %