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Inventory (Schedule of Components of Inventory) (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Sep. 30, 2017
Inventory Disclosure [Abstract]    
Raw materials $ 11,857 $ 15,826
Work in-process 5,402 6,586
Finished goods 5,024 5,413
Inventory balance at end of period 22,283 27,825
Current portion 20,850 25,139
Non-Current portion 1,433 $ 2,686
Inventory reserve $ 1,000