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, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Current:
Domestic	$ (1,871)	$ (1,182)	$ (4,824)	$ (2,980)
Foreign	(1,006)	(1,029)	(3,260)	(3,050)
Total current income and mining tax provision	(2,877)	(2,211)	(8,084)	(6,030)
Deferred:
Domestic	(9,532)	(3,696)	(26,155)	(17,619)
Foreign	959	7,407	11,894	16,745
Total deferred income and mining tax (provision) benefit	(8,573)	3,711	(14,261)	(874)
Total income and mining tax (provision) benefit	$ (11,450)	$ 1,500	$ (22,345)	$ (6,904)