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Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($)
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Statement of Comprehensive Income [Abstract]    
Net income $ 715,170 $ 523,380
Foreign currency translation adjustment 1,497 (3,466)
Comprehensive income $ 716,667 $ 519,914