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13) Income Taxes (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Details        
Effective Income Tax Rate Reconciliation, Percent 22.20% 37.80% 20.50% 36.90%
Income tax expense $ 924,014 $ 1,508,435 $ 5,185,272 $ 2,546,205