Deferred Government Grants (Tables)

6 Months Ended

Jun. 30, 2019

Deferred Government Grants [Abstract]

Schedule of deferred government grants

	December 31,			June 30,
	2018			2019
Total government grants	$	4,457,064		$	4,393,259
Less: Current portion		(143,775	)		(144,040	)
Non-current portion	$	4,313,289		$	4,249,219