Subsequent events (Additional Information) (Details) - Jul. 10, 2023 - Subsequent Event [Member] $ / shares in Units, $ in Millions, $ in Millions	USD ($) $ / shares shares	CAD ($) shares
Alexco Resource Corp
Subsequent Event [Line Items]
Common stock per share | $ / shares	$ 0.0166
Hecla
Subsequent Event [Line Items]
Common stock outstanding shares | shares	5,502,956	5,502,956
Capital Invest | $		$ 2
Interest Rate	19.90%	19.90%
Canada | Alexco Resource Corp
Subsequent Event [Line Items]
Common stock value | $	$ 18.8
Canada | Hecla
Subsequent Event [Line Items]
Issuance of Common Share | shares	3,676,904	3,676,904