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Commitments and Contingencies (Tables)
3 Months Ended
Aug. 31, 2016
Commitments and Contingencies Disclosure [Abstract]  
Amounts of Obligations from Repurchased Units and Incurred Net Losses for Periods

The amounts of obligations from repurchased units and incurred net losses for the periods presented are as follows:

 

     Three-Months Ended
August 31,
 
     2016      2015  
     (Unaudited)  
     (Dollars in thousands)  

Number of units repurchased

     —           —     

Obligations from units repurchased

   $ —         $ —     

Net losses on repurchased units

   $ —         $ —