Commitments and contingencies (Tables)

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

Minimum future commitments under these agreements as of December 31, 2018 are as follows:

For the years ending December 31,	$
2019		2,288,437
2020		1,790,861
2021		1,621,298
2022		668,792
		6,369,388