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Consolidated Statement of Stockholders' Equity - USD ($)
Preferred Stock
Common Stock
Capital in Excess of Par
Accumulated Other Comprehensive Income (Loss)
Retained Earnings
Treasury Stock
Total
Beginning Balance, Amount at Dec. 31, 2017 $ 0 $ 116,186 $ 68,380,390 $ 1,100,647 $ 27,152,822 $ (2,172,299) $ 94,577,746
Beginning Balance, Shares at Dec. 31, 2017 0 11,618,646       986,809  
Cumulative effect of adoption of updated accounting guidance for equity financial instruments at January 1, 2018       (414,242) 414,242    
Stock-based compensation, Amount     702,650       702,650
Shares deducted from exercise of stock options for payment of withholding taxes, Shares   (72,063)          
Shares deducted from exercise of stock options for payment of withholding taxes, Amount   $ (719) (1,356,452)       (1,357,171)
Vesting of restricted stock awards, Shares   19,482          
Vesting of restricted stock awards, Amount   $ 190 (190)        
Shares deducted from restricted stock awards for payment of withholding taxes, Shares   (2,877)          
Shares deducted from restricted stock awards for payment of withholding taxes, Amount   $ (29) (50,975)       (51,004)
Exercise of stock options, Shares   211,960          
Exercise of stock options, Amount   $ 2,123 88,517       90,640
Acquisition of treasury stock, Amount           $ (540,253) (540,253)
Acquisition of treasury stock, Shares           40,630  
Dividends         (4,279,494)   (4,279,494)
Net income         3,093,246   3,093,246
Other comprehensive loss       (3,570,718)     (3,570,718)
Ending Balance, Amount at Dec. 31, 2018 $ 0 $ 117,751 67,763,940 (2,884,313) 26,380,816 $ (2,712,552) 88,665,642
Ending Balance, Shares at Dec. 31, 2018 0 11,775,148       1,027,439  
Stock-based compensation, Amount     1,501,377       1,501,377
Vesting of restricted stock awards, Shares   58,246          
Vesting of restricted stock awards, Amount   $ 580 (580)       0
Shares deducted from restricted stock awards for payment of withholding taxes, Shares   (11,505)          
Shares deducted from restricted stock awards for payment of withholding taxes, Amount   $ (113) (154,339)       (154,452)
Exercise of stock options, Shares   3,000          
Exercise of stock options, Amount   $ 30 23,520       23,520
Dividends         (3,501,366)   (1,501,377)
Net income         (5,966,353)   (5,966,353)
Other comprehensive loss       7,653,183     7,653,183
Ending Balance, Amount at Dec. 31, 2019 $ 0 $ 118,248 $ 69,133,918 $ 4,768,870 $ 16,913,097 $ (2,712,552) $ 88,221,581
Ending Balance, Shares at Dec. 31, 2019 0 11,824,889       1,027,439