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Inventory (Schedule of Components of Inventory) (Details) - USD ($)
12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2017
Inventory Disclosure [Abstract]      
Raw materials $ 11,510,000 $ 11,857,000  
Work in-process 8,176,000 5,402,000  
Finished goods 4,365,000 5,024,000  
Inventory balance at end of period 24,051,000 22,283,000  
Current portion 24,051,000 20,850,000  
Non-Current portion 0 1,433,000  
Inventory valuation reserve $ 1,300,000 $ 1,000,000 $ 0