Stock-based compensation (Tables)

6 Months Ended

Jun. 30, 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 June 30, 2016, a summary of options outstanding under the Company’s 2014 options grant was as follows:

Range of Exercise Price		Weighted- Average Remaining Contractual Life (Years)		Number Outstanding		Weighted- Average Exercise Price		Number Exercisable		Weighted- Average Exercise Price
$	0.17		2.88		175,000	$	0.17		175,000	$	0.17