Note 3 - Income and Mining Taxes - Major Components of Income Tax Provision (Benefit) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Current:
Domestic	$ (5,414)	$ (1,871)	$ (10,742)	$ (4,824)
Foreign	(4,961)	(1,006)	(8,830)	(3,260)
Total current income and mining tax provision	(10,375)	(2,877)	(19,572)	(8,084)
Deferred:
Domestic	(32,747)	(9,532)	(63,759)	(26,155)
Foreign	(11,755)	959	(20,252)	11,894
Total deferred income and mining tax (provision) benefit	(44,502)	(8,573)	(84,011)	(14,261)
Total income and mining tax (provision) benefit	$ (54,877)	$ (11,450)	$ (103,583)	$ (22,345)