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Fair Value of Financial Instruments (Tables)
 9 Months Ended
Jan. 31, 2017
Fair Value Disclosures [Abstract]  
Assets and Liabilities Measured at Fair Value on Recurring Basis

The following tables present our assets and liabilities that we measured at fair value on a recurring basis as of January 31, 2017 and April 30, 2016, respectively, and indicates the fair value hierarchy of the valuation techniques we used to determine such fair value (in thousands):

 

     January 31, 2017  
     Quoted Prices
in Active
Markets for
Identical Assets
(Level 1)		      Significant
Other
Observable
Inputs
(Level 2)		      Significant
Unobservable
Inputs
(Level 3)		      Balance  

Cash equivalents

    $ 51,818      $ —        $ —        $ 51,818  

Marketable securities

      8,551        14,949        —          23,500  
  

 

 

     

 

 

     

 

 

     

 

 

  

Total

    $ 60,369      $ 14,949      $ —        $ 75,318  
  

 

 

     

 

 

     

 

 

     

 

 

  
     April 30, 2016  
     Quoted Prices
in Active
Markets for
Identical Assets
(Level 1)		      Significant
Other
Observable
Inputs
(Level 2)		      Significant
Unobservable
Inputs
(Level 3)		      Balance  

Cash equivalents

    $ 45,977      $ —        $ —        $ 45,977  

Marketable securities

      7,374        21,487        —          28,861  
  

 

 

     

 

 

     

 

 

     

 

 

  

Total

    $ 53,351      $ 21,487      $ —        $ 74,838