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Net Income per Share (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Earnings Per Share [Abstract]        
Net income from continuing operations - basic and diluted $ 531,541 $ 284,394 $ 93,157 $ 368,109
Weighted average shares outstanding - basic 6,869,027 6,874,679 6,871,299 6,874,314
Weighted average shares outstanding - diluted 6,869,027 6,886,900 6,871,299 6,875,195
Per share data:        
Basic from continuing operations $ 0.08 $ 0.04 $ 0.01 $ 0.05
Diluted from continuing operations $ 0.08 $ 0.04 $ 0.01 $ 0.05