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Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
AOCI Attributable to Parent [Member]
Total
Balance (in shares) at Dec. 31, 2018 9,293,305        
Balance at Dec. 31, 2018 $ 18,586,610 $ 20,461,724 $ 137,891,821 $ (4,075,091) $ 172,865,064
Net income 4,237,435 4,237,435
Other comprehensive income 4,178,838 4,178,838
Retirement of stock (in shares) (50,483)        
Retirement of stock $ (100,966) (1,185,336) (1,286,302)
Cash dividends declared (2,218,277) (2,218,277)
Balance (in shares) at Mar. 31, 2019 9,242,822        
Balance at Mar. 31, 2019 $ 18,485,644 19,276,388 139,910,979 103,747 $ 177,776,758
Balance (in shares) at Dec. 31, 2019 9,222,747       9,222,747
Balance at Dec. 31, 2019 $ 18,445,494 18,794,141 146,225,085 4,114,752 $ 187,579,472
Net income 3,554,513 3,554,513
Other comprehensive income 363,440 363,440
Retirement of stock (in shares) (34,153)        
Retirement of stock $ (68,306) (638,594) (706,900)
Cash dividends declared (2,297,148) $ (2,297,148)
Balance (in shares) at Mar. 31, 2020 9,188,594       9,188,594
Balance at Mar. 31, 2020 $ 18,377,188 $ 18,155,547 $ 147,482,450 $ 4,478,192 $ 188,493,377