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Inventories (Tables)
3 Months Ended
Sep. 30, 2018
Inventory Disclosure [Abstract]  
Inventories

 

   September 30, 2018  June 30, 2018
   (in thousands)
Raw materials  $806   $759 
Work in process   185    238 
Finished goods   828    753 
 Total inventories   1,819    1,750 
Allowance for inventory reserves   (58)   (58)
Total inventories, net of allowance  $1,761   $1,692