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Goodwill (Tables)
 12 Months Ended
Apr. 30, 2017
Goodwill Disclosure [Abstract]  
Schedule of the changes in goodwill balances

The following table presents the changes in the Company's goodwill balance (in thousands):

 

 

 

 

 

Balance at April 30, 2016

    

$

 —

Goodwill arising from acquisitions

 

 
122

Balance at April 30, 2017

 

$
122