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Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) | Total | Preferred Stock | Common Stock | Treasury Stock | Capital in Excess of Par | Accumulated other comprehensive Income | Retained Earnings
--- | --- | --- | --- | --- | --- | --- | ---
Balance, shares at Dec. 31, 2018 |  |  | 11,775,148 | 1,027,439 |  |  |
Balance, amount at Dec. 31, 2018 | $ 88,665,642 | $ 0 | $ 117,751 | $ (2,712,552) | $ 67,763,940 | $ (2,884,313) | $ 26,380,816
Stock-based compensation | 709,207 | 0 | $ 0 | 0 | 709,207 | 0 | 0
Vesting of restricted stock awards, shares |  |  | 31,546 |  |  |  |
Vesting of restricted stock awards, amount | 0 | 0 | $ 314 | 0 | (314) | 0 | 0
Shares deducted from restricted stock awards for payment of withholding taxes, shares |  |  | (7,607) |  |  |  |
Shares deducted from restricted stock awards for payment of withholding taxes, amount | (122,838) | 0 | $ (75) | 0 | (122,763) | 0 | 0
Exercise of stock options, shares |  |  | 3,000 |  |  |  |
Exercise of stock options, amount | 23,550 | 0 | $ 30 | 0 | 23,520 | 0 | 0
Dividends | (2,153,349) | 0 | 0 | 0 | 0 | 0 | (2,153,349)
Net income | (5,695,810) | 0 | 0 | 0 | 0 | 0 | (5,695,810)
Change in unrealized gains on available-for-sale securities, net of tax | 6,243,360 | 0 | $ 0 | $ 0 | 0 | 6,243,360 | 0
Balance, shares at Jun. 30, 2019 |  |  | 11,802,087 | 1,027,439 |  |  |
Balance, amount at Jun. 30, 2019 | 87,669,762 | 0 | $ 118,020 | $ (2,712,552) | 68,373,590 | 3,359,047 | 18,531,657
Balance, shares at Mar. 31, 2019 |  |  | 11,796,188 | 1,027,439 |  |  |
Balance, amount at Mar. 31, 2019 | 83,775,171 | 0 | $ 117,962 | $ (2,712,552) | 67,957,604 | 442,493 | 17,969,664
Stock-based compensation | 399,325 | 0 | $ 0 | 0 | 399,325 | 0 | 0
Vesting of restricted stock awards, shares |  |  | 3,553 |  |  |  |
Vesting of restricted stock awards, amount | 0 | 0 | $ 34 | 0 | (34) | 0 | 0
Shares deducted from restricted stock awards for payment of withholding taxes, shares |  |  | (654) |  |  |  |
Shares deducted from restricted stock awards for payment of withholding taxes, amount | (6,831) | 0 | $ (6) | 0 | (6,825) | 0 | 0
Exercise of stock options, shares |  |  | 3,000 |  |  |  |
Exercise of stock options, amount | 23,550 | 0 | $ 30 | 0 | 23,520 | 0 | 0
Dividends | (1,077,387) | 0 | 0 | 0 | 0 | 0 | (1,077,387)
Net income | 1,639,380 | 0 | 0 | 0 | 0 | 0 | 1,639,380
Change in unrealized gains on available-for-sale securities, net of tax | 2,916,554 | 0 | $ 0 | $ 0 | 0 | 2,916,554 | 0
Balance, shares at Jun. 30, 2019 |  |  | 11,802,087 | 1,027,439 |  |  |
Balance, amount at Jun. 30, 2019 | 87,669,762 | 0 | $ 118,020 | $ (2,712,552) | 68,373,590 | 3,359,047 | 18,531,657
Balance, shares at Dec. 31, 2019 |  |  | 11,824,889 | 1,027,439 |  |  |
Balance, amount at Dec. 31, 2019 | 88,221,581 | 0 | $ 118,248 | $ (2,712,552) | 69,133,918 | 4,768,870 | 16,913,097
Stock-based compensation | $ 942,387 | 0 | $ 0 | 0 | 942,387 | 0 | 0
Vesting of restricted stock awards, shares | (59,420) |  | 60,896 |  |  |  |
Vesting of restricted stock awards, amount | $ 0 | 0 | $ 607 | 0 | (607) | 0 | 0
Shares deducted from restricted stock awards for payment of withholding taxes, shares |  |  | (19,531) |  |  |  |
Shares deducted from restricted stock awards for payment of withholding taxes, amount | (124,342) | 0 | $ (193) | $ 0 | (124,149) | 0 | 0
Acquisition of treasury stock, shares |  |  |  | 168,670 |  |  |
Acquisition of treasury stock, amount | (801,788) | 0 | 0 | $ (801,788) | 0 | 0 | 0
Dividends | (1,103,400) | 0 | 0 | 0 | 0 | 0 | (1,103,400)
Net income | (836,013) | 0 | 0 | 0 | 0 | 0 | (836,013)
Change in unrealized gains on available-for-sale securities, net of tax | 3,323,053 | 0 | $ 0 | $ 0 | 0 | 3,323,053 | 0
Balance, shares at Jun. 30, 2020 |  |  | 11,866,254 | 1,196,109 |  |  |
Balance, amount at Jun. 30, 2020 | 89,621,478 | 0 | $ 118,662 | $ (3,514,340) | 69,951,549 | 8,091,923 | 14,973,684
Balance, shares at Mar. 31, 2020 |  |  | 11,851,266 | 1,069,873 |  |  |
Balance, amount at Mar. 31, 2020 | 76,862,719 | 0 | $ 118,512 | $ (2,955,276) | 69,533,150 | (626,601) | 10,792,934
Stock-based compensation | 454,937 | 0 | $ 0 | 0 | 454,937 | 0 | 0
Vesting of restricted stock awards, shares |  |  | 22,030 |  |  |  |
Vesting of restricted stock awards, amount | 0 | 0 | $ 220 | 0 | (220) | 0 | 0
Shares deducted from restricted stock awards for payment of withholding taxes, shares |  |  | (7,042) |  |  |  |
Shares deducted from restricted stock awards for payment of withholding taxes, amount | (36,388) | 0 | $ (70) | $ 0 | (36,318) | 0 | 0
Acquisition of treasury stock, shares |  |  |  | 126,236 |  |  |
Acquisition of treasury stock, amount | (559,064) | 0 | 0 | $ (559,064) | 0 | 0 | 0
Dividends | (427,440) | 0 | 0 | 0 | 0 | 0 | (427,440)
Net income | 4,608,190 | 0 | 0 | 0 | 0 | 0 | 4,608,190
Change in unrealized gains on available-for-sale securities, net of tax | 8,718,524 | 0 | $ 0 | $ 0 | 0 | 8,718,524 | 0
Balance, shares at Jun. 30, 2020 |  |  | 11,866,254 | 1,196,109 |  |  |
Balance, amount at Jun. 30, 2020 | $ 89,621,478 | $ 0 | $ 118,662 | $ (3,514,340) | $ 69,951,549 | $ 8,091,923 | $ 14,973,684

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