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Consolidated Statements of Stockholders’ Equity (USD $)
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Parent [Member]
Total
Balances, at Dec. 31, 2009 $ 14,030,384 $ 47,287,351 $ (30,221,164)   $ 31,096,571  
Balances, (in Shares) at Dec. 31, 2009 67,080,353          
Exercise of stock options 27,350 (12,541)     14,809  
Exercise of stock options (in Shares) 33,678         33,678
Repurchase and retirement of shares (2,732,868) (6,974,225)     (9,707,093)  
Repurchase and retirement of shares (in Shares) (13,664,340)          
Cancellation of restricted stock (in Shares) (1,100)          
Stock-based compensation   400,002     400,002  
Net income for the year     2,116,948   2,116,948 2,116,948
Balances, at Dec. 31, 2010 11,324,866 40,700,587 (28,104,216)   23,921,237  
Balances, (in Shares) at Dec. 31, 2010 53,448,591          
Exercise of stock options 38,846 (7,500)     31,346  
Exercise of stock options (in Shares) 73,708         73,708
Other proceeds   3,659     3,659 3,659
Repurchase and retirement of shares (4,753) (13,689)     (18,442)  
Repurchase and retirement of shares (in Shares) (23,765)          
Cancellation of restricted stock (in Shares) (950)          
Stock-based compensation   310,956     310,956  
Net income for the year     6,170,231   6,170,231 6,170,231
Balances, at Dec. 31, 2011 11,358,959 40,994,013 (21,933,985)   30,418,987 30,418,987
Balances, (in Shares) at Dec. 31, 2011 53,497,584          
Exercise of stock options 713,746 (295,638)     418,108  
Exercise of stock options (in Shares) 766,340         766,340
Repurchase and retirement of shares (1,988,288) (7,127,545)     (9,115,833)  
Repurchase and retirement of shares (in Shares) (9,941,440)          
Cancellation of restricted stock (in Shares) (325)          
Stock-based compensation   360,699     360,699  
Net income for the year     4,424,142   4,424,142 4,424,142
Other comprehensive income       44,104,000,000 44,104,000,000 44,104
Balances, at Dec. 31, 2012 $ 10,084,417 $ 33,931,529 $ (17,509,843) $ 44,104 $ 26,550,207 $ 26,550,207
Balances, (in Shares) at Dec. 31, 2012 44,322,159