Commitments and contingencies (Tables)

12 Months Ended

Dec. 31, 2020

Notes to Financial Statements [Abstract]

Disclosure of maturity analysis of operating lease payments [Table Text Block]

		2020		2019
Within one year	$	58,173	$	57,860
After one year but not more than five years		2,192		26,395
More than five years		—		—
	$	60,365	$	84,255