Inventories (Tables)

3 Months Ended

Mar. 31, 2018

SCHEDULE OF INVENTORIES [Table Text Block]

		December 31,		March 31,
		2017		2018
Raw materials	$	1,814,704	$	2,547,462
Work in progress		2,188,193		2,453,321
Finished goods		5,829,508		6,604,625
	$	9,832,405	$	11,605,408