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Consolidated Statement of Changes in Stockholders' Equity - USD ($)
Common Stock [Member]
Treasury Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Total
Balance (in shares) at Dec. 31, 2019 13,518,036        
Balance at Dec. 31, 2019 $ 13,518 $ 0 $ 27,584,610 $ 3,683,954 $ 31,282,082
Stock-based compensation 0 0 1,226,890 0 1,226,890
Cash dividends $ 0 0 0 (1,357,648) (1,357,648)
Restricted common stock granted for services (in shares) 110,639        
Restricted common stock granted for services $ 111 0   0 0
Restricted common stock granted for services     (111)    
Total shares purchased (in shares) 0        
Purchase of treasury stock $ 0 (146,465) 0 0 (146,465)
Net Income (loss) $ 0 0 0 5,359,414 5,359,414
Balance (in shares) at Dec. 31, 2020 13,628,675        
Balance at Dec. 31, 2020 $ 13,629 (146,465) 28,811,389 7,685,720 36,364,273
Stock-based compensation 0 0 1,627,718 0 1,627,718
Cash dividends $ 0 0 0 (3,140,600) (3,140,600)
Restricted common stock granted for services (in shares) 112,255        
Restricted common stock granted for services $ 112 0   0 $ 112
Restricted common stock granted for services     0    
Total shares purchased (in shares)         23,638
Net Income (loss) $ 0 0 0 11,849,934 $ 11,849,934
Common stock issued for the exercise of options (in shares) 4,166        
Common stock issued for the exercise of options $ 4 0 33,490 0 33,494
Balance (in shares) at Dec. 31, 2021 13,745,096        
Balance at Dec. 31, 2021 $ 13,745 $ (146,465) $ 30,472,597 $ 16,395,054 $ 46,734,931