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Inventories - Inventories (Detail) (USD $)
Jun. 30, 2013
Sep. 30, 2012
Inventory Net [Abstract]    
Raw materials $ 6,573,000 $ 7,375,000
Work in process 1,081,000 1,201,000
Finished goods 3,935,000 3,202,000
Used equipment 305,000 140,000
Total Inventory $ 11,894,000 $ 11,918,000