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Income Taxes - Tax Reforms (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Taxes      
Federal statutory rate (as a percent) 21.00% 21.00% 34.00%
Effective tax rate     33.90%
Increase in income tax expense     $ 473,899