Stock-based compensation (Tables)

3 Months Ended

Mar. 31, 2016

Disclosure Of Compensation Related Costs, Share-Based Payments [Abstract]

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

As of March 31, 2016, a summary of options outstanding under the Company’s 2014 options grant was as follows:

						Weighted-				Weighted-
Range of		Weighted-				Average				Average
Exercise		Average Remaining		Number		Exercise		Number		Exercise
Price		Contractual Life (Years)		Outstanding		Price		Exercisable		Price
$	0.17		3.13		175,000	$	0.17		175,000	$	0.17