Subsequent event (Details) - Subsequent Event	Jun. 01, 2023 USD ($) shares
RSUs | Senior management
Subsequent Event [Line Items]
Cash salaries | $	$ 155,000
Granted (in shares) | shares	248,531
DSUs. | Director
Subsequent Event [Line Items]
Director fees | $	$ 79,000
Granted (in shares) | shares	163,142