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Inventories (Details) (USD $)
Dec. 31, 2012
Sep. 30, 2012
Inventories    
Raw materials $ 8,310,000 $ 7,375,000
Work in process 3,407,000 1,201,000
Finished goods 3,194,000 3,202,000
Used equipment 195,000 140,000
Total Inventory $ 15,106,000 $ 11,918,000