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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
Dec. 31, 2011
Sep. 30, 2011
Preferred Stock, shares authorized 10,000,000 10,000,000
Preferred Stock, par value (in dollars per share) $ 0.001 $ 0.001
Preferred Stock, shares issued 0 0
Preferred Stock, shares outstanding 0 0
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized 75,000,000 75,000,000
Common stock, shares issued 18,297,734 18,286,884
Treasury stock, shares 1,633,426 1,544,910
Class A Convertible stock
    
Preferred Stock, shares authorized 200,000 200,000