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Summary of Significant Accounting Policies (Tables)
12 Months Ended
Apr. 30, 2019
Accounting Policies [Abstract]  
Schedule of Cash and Restricted Cash
Cash and restricted cash consists of the following (table in thousands):
 
April 30, 2019
 
April 30, 2018
 
 
 
 
Cash
$
3,237

 
$
856

Restricted cash

 
150

Total cash and restricted cash
$
3,237

 
$
1,006