Condensed Consolidated Statements of Comprehensive Income/(Loss) (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net income/(loss) attributable to common stockholders	$ 1,529,781	$ 2,679,411	$ 2,123,264	$ 2,753,385
Other comprehensive income/(loss)
Change in foreign currency translation adjustment	(22,455)	14,544	(21,168)	12,076
Other comprehensive income/(loss)	(22,455)	14,544	(21,168)	12,076
Comprehensive income/(loss)	$ 1,507,326	$ 2,693,955	$ 2,102,096	$ 2,765,461