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Consolidated Statements of Operations and Comprehensive Income (Unaudited) (Parentheticals) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Other comprehensive income (loss), tax $ 71,303 $ 60,659 $ 131,382 $ 544,363