Goodwill

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets [Abstract]

Goodwill Disclosure [Text Block]

10. Goodwill

There were no changes in goodwill during the years ended December 31, 2017 and 2016. As of December 31, 2017 and 2016, goodwill was not impaired and there were no accumulated impairment losses.