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Inventories (Details) (USD $)
Jan. 31, 2013
Oct. 31, 2012
Inventories [Abstract]    
Finished goods $ 6,312,948 $ 5,909,892
Work in process 3,855,637 3,220,423
Raw materials 9,090,401 9,106,277
Production supplies 200,827 227,427
Total $ 19,459,813 $ 18,464,019