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Reconciliation of Segment Operating Income (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Reconciliation Of Segment Operating Income |  |
Total operating income | $ 7,456,906 | $ 7,883,053
Interest expense, net | 1,858,224 | 1,327,160
Other expense | 67,458 | 62,596
Consolidated income before taxes | $ 5,531,224 | $ 6,493,297

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