XML 34 R22.htm IDEA: XBRL DOCUMENT v3.8.0.1
Inventories (Tables)
9 Months Ended
Jan. 31, 2018
Inventory Disclosure [Abstract]  
Summary of Inventories

Inventories consisted of the following (in thousands):

 

     January 31, 2018      April 30, 2017  

Finished products

   $ 3,778      $ 3,179  

Work in process

     2,133        1,950  

Raw materials

     11,769        9,806  
  

 

 

    

 

 

 
   $ 17,680      $ 14,935