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Inventory (Schedule of Components of Inventory) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Sep. 30, 2018
Inventory Disclosure [Abstract]          
Raw materials $ 17,931   $ 17,931   $ 11,857
Work in-process 9,249   9,249   5,402
Finished goods 4,855   4,855   5,024
Inventory balance at end of period 32,035   32,035   22,283
Current portion 31,123   31,123   20,850
Non-Current portion 912   912   $ 1,433
Inventory valuation reserve $ 0 $ 500 $ 700 $ 500