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Inventory (Schedule of Components of Inventory) (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Jun. 30, 2018
Inventory Disclosure [Abstract]    
Component parts $ 5,229 $ 5,156
Work in process 1,383 3,525
Finished goods 4,198 5,148
Total $ 10,810 $ 13,829