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Earnings Per Share (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Basic and diluted earnings per share calculation:    
Net income to common stockholders $ 815,998 $ 514,965
Weighted average number of common shares outstanding - basic 4,491,135 4,473,591
Basic net income per share $ 0.18 $ 0.12
Weighted average number of common shares outstanding - diluted 4,500,027 4,490,795
Diluted net income per share $ 0.18 $ 0.11