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, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Current:
Domestic	$ (2,713)	$ (1,961)	$ (5,328)	$ (2,953)
Foreign	(3,560)	(1,275)	(3,869)	(2,254)
Total current income and mining tax provision	(6,273)	(3,236)	(9,197)	(5,207)
Deferred:
Domestic	(19,288)	(11,440)	(31,012)	(16,623)
Foreign	(7,000)	5,596	(8,497)	10,935
Total deferred income and mining tax (provision) benefit	(26,288)	(5,844)	(39,509)	(5,688)
Total income and mining tax (provision) benefit	$ (32,561)	$ (9,080)	$ (48,706)	$ (10,895)