Income taxes (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($)
Income Tax [Member]
Operating loss carryforwards	$ 129.0
Limited to use in future years	$8.3
Foreign net operating loss carryforwards	$ 19.3
Generated pre-2018 [Member]
Income Tax [Member]
Operating loss carryforwards	23.7
Generated post-2017 [Member]
Income Tax [Member]
Operating loss carryforwards	105.3
Canadian NOLs [Member]
Income Tax [Member]
Foreign net operating loss carryforwards	16.0
Israeli operations [Member]
Income Tax [Member]
Foreign net operating loss carryforwards	$ 3.3