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Inventories - Net Inventories (Detail) (USD $)
Jun. 30, 2014
Sep. 30, 2013
Inventory Net [Abstract]    
Raw materials $ 6,002,000 $ 6,238,000
Work in process 2,218,000 3,307,000
Finished goods 4,121,000 4,054,000
Used equipment 274,000 527,000
Inventories, net $ 12,615,000 $ 14,126,000