Loss Per Share (Tables)

3 Months Ended

Mar. 31, 2018

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

		Three months ended March 31,
		2017			2018
Net loss	$	(2,068,216	)	$	(2,567,833	)
Weighted average shares used in basic and diluted computation (note)		19,856,778			26,502,086
Loss per share	$	(0.10	)	$	(0.10	)