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Stockholders' Equity (Tables)
3 Months Ended
Jul. 31, 2016
Equity [Abstract]  
Schedule of Warrants Activity
    Shares     Weighted
average
exercise
price
    Weighted
average
remaining
contractual
life years
    Aggregate
intrinsic
value (1)
 
                         
Balance May 1, 2016     207,625     $ 19.74       1.24        
                                 
Issued                        
Expired     (73,958 )   $ 40.68                  
Balance July 31, 2016     133,667     $ 8.15       2.32        

 

  (1) This amount represents the difference between the conversion price and $1.80, the closing price of Dataram common stock on July 29, 2016 as reported on the NASDAQ Stock Market, for all in-the-money warrants outstanding.