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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $)
Total
Common Stock
Additional Paid-in Capital
Retained Earnings
Treasury Stock
Accumulated Other Comprehensive Income (Loss)
Balances at Dec. 31, 2009 $ 52,695,278 $ 183,231 $ 27,014,078 $ 25,889,008 $ (257,323) $ (133,716)
Balances (in shares) at Dec. 31, 2009   18,323,091        
Increase (Decrease) in Stockholders' Equity            
5% common stock dividend (431) 9,142 (9,573)      
5% common stock dividend (in shares)   914,160        
Issuance of restricted common stock   50 (50)      
Issuance of restricted common stock (in shares)   5,000        
Amortization of unearned compensation restricted stock awards 86,230   86,230      
Amortization of compensation cost of unvested stock options 422,024   422,024      
Foreign currency translation adjustments 882,381         882,381
Net income (loss) (1,222,682)     (1,222,682)    
Balances at Dec. 31, 2010 52,862,800 192,423 27,512,709 24,666,326 (257,323) 748,665
Balances (in shares) at Dec. 31, 2010   19,242,251        
Increase (Decrease) in Stockholders' Equity            
Issuance of common stock awards 224,999 318 224,681      
Issuance of common stock awards (in shares) 104,145 31,851        
Issuance of restricted common stock   150 (150)      
Issuance of restricted common stock (in shares)   15,000        
Exercise of stock options 181,505 593 180,912      
Exercise of stock options (in shares) 59,334 59,334        
Amortization of unearned compensation restricted stock awards 28,603   28,603      
Amortization of compensation cost of unvested stock options 230,167   230,167      
Purchase of treasury shares (71)       (71)  
Foreign currency translation adjustments (641,538)         (641,538)
Net income (loss) 10,833,215     10,833,215    
Balances at Dec. 31, 2011 63,719,680 193,484 28,176,922 35,499,541 (257,394) 107,127
Balances (in shares) at Dec. 31, 2011 19,348,436 19,348,436        
Increase (Decrease) in Stockholders' Equity            
5% common stock dividend (1,150) 9,720 (10,870)      
5% common stock dividend (in shares)   971,990        
Cash dividend (3,097,864)     (3,097,864)    
Issuance of common stock awards (in shares) 138,120          
Issuance of restricted common stock   2,191 (2,191)      
Issuance of restricted common stock (in shares)   219,125        
Exercise of stock options 377,380 1,929 809,066   (433,615)  
Exercise of stock options (in shares) 192,949 192,949        
Amortization of unearned compensation restricted stock awards 317,109   317,109      
Amortization of compensation cost of unvested stock options 283,950   283,950      
Foreign currency translation adjustments 714,576         714,576
Net income (loss) 15,671,879     15,671,879    
Balances at Dec. 31, 2012 $ 77,985,561 $ 207,325 $ 29,573,986 $ 48,073,556 $ (691,009) $ 821,703
Balances (in shares) at Dec. 31, 2012 20,732,500 20,732,500