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Consolidated Balance Sheets (Parenthetical) (USD $)
Jan. 31, 2012
Jan. 31, 2011
Consolidated Balance Sheets [Abstract]    
Accounts Receivable, reserves $ 428,409 $ 546,870
Preferred stock, par value $ 10 $ 10
Preferred stock, shares authorized 100,000 100,000
Preferred stock, shares issued 0 0
Common stock, par value $ 0.05 $ 0.05
Common stock, shares authorized 13,000,000 13,000,000
Common stock, shares issued 8,956,488 8,660,270
Treasury stock, shares 1,542,276 1,414,981