Note 3 - Income and Mining Taxes - Major Components of Income Tax Provision (Benefit) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Current:
Domestic	$ (1,961)	$ (270)	$ (2,953)	$ (1,798)
Foreign	(1,275)	(847)	(2,254)	(2,021)
Total current income and mining tax provision	(3,236)	(1,117)	(5,207)	(3,819)
Deferred:
Domestic	(11,440)	(8,582)	(16,623)	(13,923)
Foreign	5,596	4,537	10,935	9,338
Total deferred income and mining tax provision	(5,844)	(4,045)	(5,688)	(4,585)
Total income and mining tax provision	$ (9,080)	$ (5,162)	$ (10,895)	$ (8,404)