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STATEMENTS OF SHAREHOLDERS' EQUITY (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, 2008 $ 6,046 $ 26,660,606 $ 7,942,021 $ (541,006) $ (84,517) $ 33,983,150
Balance (in shares) at Dec. 31, 2008 6,046,273          
Increase (Decrease) in Shareholders' Equity [Roll Forward]            
Net Income 0 0 3,946,007 0 0 3,946,007
Change in unrealized loss from interest rate swap 0 0 0 0 31,643 31,643
Comprehensive income           3,977,650
Common stock issued upon exercise of options and warrants 60 151,740 0 0 0 151,800
Common stock issued upon exercise of options and warrants (in shares) 60,000          
Common stock issued as employee compensation 17 72,990 0 0 0 (21,468)
Common stock issued as employee compensation (in shares) 16,251          
Stock compensation expense 0 483,707 0 0 0 483,707
Tax benefit from stock option plans           0
Treasury stock acquired 0 0 0 (151,800) 0 (151,800)
Balance at Dec. 31, 2009 6,123 27,369,043 11,888,028 (692,806) (52,874) 38,517,514
Balance (in shares) at Dec. 31, 2009 6,122,524          
Increase (Decrease) in Shareholders' Equity [Roll Forward]            
Net Income 0 0 529,896 0 0 529,896
Change in unrealized loss from interest rate swap 0 0 0 0 7,470 7,470
Comprehensive income           537,366
Common stock issued in share offering 500 3,529,041 0 0 0 3,529,541
Common stock issued in share offering (in shares) 500,000          
Common stock issued upon exercise of options and warrants 272 1,389,678 0 0 0 1,389,950
Common stock issued upon exercise of options and warrants (in shares) 272,000          
Common stock issued as employee compensation 17 126,846 0 0 0 (27,168)
Common stock issued as employee compensation (in shares) 17,046          
Stock compensation expense 0 553,629 0 0 0 553,629
Tax benefit from stock option plans 0 304,000 0 0 0 304,000
Treasury stock acquired 0 0 0 (288,420) 0 (288,420)
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 0 0 7,416,928 0 0 7,416,928
Change in unrealized loss from interest rate swap 0 0 0 0 23,632 23,632
Comprehensive income           7,440,560
Common stock issued upon exercise of options and warrants 165 614,282 0 0 0 614,447
Common stock issued upon exercise of options and warrants (in shares) 165,333          
Common stock issued as employee compensation 3 36,154 0 0 0 (36,157)
Common stock issued as employee compensation (in shares) 2,735          
Stock compensation expense 0 985,600 0 0 0 985,600
Tax benefit from stock option plans 0 438,000 0 0 0 438,000
Treasury stock acquired 0 0 0 (159,000) 0 (159,000)
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