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CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
Sep. 30, 2015
Sep. 30, 2014
Statement Of Financial Position [Abstract]    
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock, shares authorized 1,000,000 1,000,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 40,000,000 40,000,000
Common stock, shares issued 25,562,994 25,002,807
Common stock, shares outstanding 24,199,661 24,211,907
Treasury stock, at cost 1,363,333 790,900