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Inventories (Details) (USD $)
Jun. 30, 2012
Sep. 30, 2011
Schedule of Inventories    
Raw materials $ 6,870,000 $ 8,846,000
Work in process 393,000 2,017,000
Finished goods 4,576,000 1,726,000
Used equipment 144,000 289,000
Inventories, net $ 11,983,000 $ 12,878,000