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Earnings (Loss) Per Share (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2021
Jun. 30, 2020
Numerator:            
Net income (loss) from continuing operations $ 724,684   $ (1,679,211)   $ 373,935 $ (3,562,629)
Discontinued operations         994,217 1,556,895
Net income (loss) 1,223,491 $ 144,661 (940,589) $ (1,065,145) 1,368,152 (2,005,734)
Net (income) loss at subsidiary attributable to noncontrolling interests 5,069   22,314   27,236 31,839
Net income (loss) attributable to common shareholders $ 1,228,560   $ (918,275)   $ 1,395,388 $ (1,973,895)
Denominator:            
Weighted-average shares outstanding – basic (in shares) 14,976,034   15,241,463   14,970,241 15,241,020
Dilutive effect of other securities (in shares) 133,212   0   201,348 0
Weighted-average shares outstanding – diluted (in shares) 15,109,246   15,241,463   15,171,589 15,241,020