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STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) (USD $)
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Treasury Stock [Member]
Accumulated Other Comprehensive Loss [Member]
Total
Balance at Dec. 31, 2010 $ 6,912 $ 33,272,237 $ 12,417,924 $ (981,226) $ (45,404) $ 44,670,443
Balance (in shares) at Dec. 31, 2010 6,911,570          
Increase (Decrease) in Shareholders' Equity [Roll Forward]            
Net Income     4,743,907     4,743,907
Change in unrealized loss from interest rate swap         17,000 17,000
Common stock issued upon exercise of options 137 410,813       410,950
Common stock issued upon exercise of options (in shares) 137,000          
Common stock issued as bonus           0
Stock compensation expense   963,913       963,913
Tax benefit from stock option plan   438,000       438,000
Treasury stock acquired       (159,000)   (159,000)
Balance at Sep. 30, 2011 7,049 35,084,963 17,161,831 (1,140,226) (28,404) 51,085,213
Balance (in shares) at Sep. 30, 2011 7,048,570          
Balance at Dec. 31, 2011 7,080 35,346,273 19,834,852 (1,140,226) (21,772) 54,026,207
Balance (in shares) at Dec. 31, 2011 7,079,638          
Increase (Decrease) in Shareholders' Equity [Roll Forward]            
Net Income     7,410,775     7,410,775
Change in unrealized loss from interest rate swap         (33,826) (33,826)
Common stock issued in share offering 1,195 13,322,499       13,323,694
Common stock issued in share offering (in shares) 1,195,750          
Common stock issued upon exercise of options 196 1,224,319       1,224,515
Common stock issued upon exercise of options (in shares) 196,078         205,000
Common stock issued as bonus 15 228,275       228,290
Common stock issued as bonus (in shares) 15,260          
Stock compensation expense   382,657       382,657
Tax benefit from stock option plan   162,000       162,000
Treasury stock retired (133) (1,140,093)   1,140,226    
Treasury stock retired (in shares) (133,257)          
Balance at Sep. 30, 2012 $ 8,353 $ 49,525,930 $ 27,245,627   $ (55,598) $ 76,724,312
Balance (in shares) at Sep. 30, 2012 8,353,469