Subsequent events (Additional Information) (Details) - Apr. 06, 2023 - Subsequent Event [Member] $ in Thousands	CAD ($) shares	$ / shares
Alexco Resource Corp
Subsequent Event [Line Items]
Common stock value	$ 31,000
Common stock per share | $ / shares		$ 0.0166
Shareholders Implied Value	36
Total Implied Value	39,000
Hecla
Subsequent Event [Line Items]
Capital Invest	$ 2,000
Interest Rate	19.90%
Canada | Alexco Resource Corp
Subsequent Event [Line Items]
Common stock outstanding shares | shares	3,693,516