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Earnings Per Share (Details) (USD $)
 3 Months Ended 9 Months Ended
Oct. 31, 2012
Oct. 31, 2011
Oct. 31, 2012
Oct. 31, 2011
Numerator        
Net income (loss) from continuing operations (in dollars) $ 282,646 $ 145,634 $ (8,194,991) $ 2,095,470
Denominator        
Denominator for basic earnings per share(Weighted-average shares which reflect 356,441 and 356,441 and 356,441 and 356,441 weighted average common shares in the treasury as a result of the stock repurchase program for the three months and nine months in each of 2012 and 2011, respectively 5,330,286 5,225,020 5,276,288 5,224,371
Effect of dilutive securities from restricted stock plan and from dilutive effect of stock options 36,957 131,815 0 123,801
Denominator for diluted earnings per share (adjusted weighted average shares) 5,367,243 5,356,835 5,276,288 5,348,172
Basic earnings (loss) per share (in dollars per share) $ 0.05 $ 0.03 $ (1.55) $ 0.40
Diluted earnings (loss) per share (in dollars per share) $ 0.05 $ 0.03 $ (1.55) $ 0.39