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Certificates of Deposit and Marketable Securities (Tables)
9 Months Ended
Feb. 29, 2016
Certificates of Deposit and Marketable Securities [Abstract]  
Summary of assets measured at fair value on recurring basis

 February 29, 2016 Level 1  Level 2  Level 3  Total 
 Certificates of Deposit $-  $1,529,000  $-  $1,529,000 
 Equity Securities  23,672   -   -   23,672 
   $23,672  $1,529,000  $-  $1,552,672 

 

 May 31, 2015 Level 1  Level 2  Level 3  Total 
 Certificates of Deposit $-  $1,244,000  $-  $1,244,000 
 Equity Securities  27,568   -   -   27,568 
   $27,568  $1,244,000  $-  $1,271,568 

 

Summary of marketable securities

 

 February 29, 2016 
Current
 Amortized 
Cost
  Gross 
Unrealized 
Holding 
Gains
  Gross 
Unrealized 
Holding 
Losses
  Recorded 
Value
 
 Certificates of Deposit  $1,529,000  $-  $-  $1,529,000 
 Equity Securities  16,866   6,806   -   23,672 
   $1,545,866  $6,806  $-  $1,552,672 

 

 May 31, 2015 
Current
 Amortized 
Cost
  Gross 
Unrealized 
Holding 
Gains
  Gross 
Unrealized 
Holding 
Losses
  Recorded 
Value
 
 Certificates of Deposit 
Equity Securities
 $1,244,000  $-  $-  $1,244,000 
    16,866   10,702   -   27,568 
   $1,260,866  $10,702  $-  $1,271,568