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Inventories - Net Inventories (Detail) (USD $)
Mar. 31, 2014
Sep. 30, 2013
Inventory Net [Abstract]    
Raw materials $ 6,836,000 $ 6,238,000
Work in process 1,464,000 3,307,000
Finished goods 4,045,000 4,054,000
Used equipment 402,000 527,000
Inventories, net $ 12,747,000 $ 14,126,000