Note 7 - Income and Mining Taxes (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	2021			2020			2019
				Revised			Revised
Current:
Domestic	$	(7,073	)	$	(7,246	)	$	(3,065	)
Foreign		(6,316	)		(8,745	)		(9,427	)
Total current income and mining tax provision		(13,389	)		(15,991	)		(12,492	)
Deferred:
Domestic		43,708			5,096			13,962
Foreign		(750	)		2,696			16,848
Total deferred income and mining tax benefit		42,958			7,792			30,810
Total income and mining tax benefit (provision)	$	29,569		$	(8,199	)	$	18,318

Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]

	2021			2020			2019
				Revised			Revised
Domestic	$	38,003		$	(1,400	)	$	(51,165	)
Foreign		(32,477	)		142			(62,062	)
Total	$	5,526		$	(1,258	)	$	(113,227	)

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	2021					2020					2019
						Revised					Revised
Computed “statutory” benefit (provision)	$	(1,161	)	21	%	$	264		21	%	$	23,778		21	%
Percentage depletion		8,076		(146	)		5,327		423			3,030		3
Change in valuation allowance		38,058		(689	)		786		62			686		—
State taxes, net of federal tax benefit		(5,844	)	106			(1,164	)	(93	)		2,648		2
Foreign currency remeasurement of monetary assets and liabilities		(3,625	)	66			(4,824	)	(383	)		(8,629	)	(8	)
Rate differential on foreign earnings		2,445		(44	)		2,362		188			3,999		4
Compensation		1,094		(20	)		(458	)	(36	)		(1,056	)	(1	)
Mining and other taxes		(6,990	)	126			(9,245	)	(735	)		(4,887	)	(4	)
Other		(2,484	)	45			(1,247	)	(99	)		(1,251	)	(1	)
Total benefit (provision)	$	29,569		(535	) %	$	(8,199	)	(652	) %	$	18,318		16	%

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	December 31,
	2021			2020
				Revised
Deferred tax assets:
Accrued reclamation costs	$	31,558		$	32,938
Deferred exploration		17,959			11,623
Foreign net operating losses		18,152			13,303
Domestic net operating losses		213,637			198,438
Pension and benefit obligation		1,824			12,341
Foreign exchange loss		19,542			19,808
Foreign tax credit carryforward		2,493			3,358
Miscellaneous		29,505			18,385
Total deferred tax assets		334,670			310,194
Valuation allowance		(39,152	)		(77,210	)
Total deferred tax assets		295,518			232,984
Deferred tax liabilities:
Miscellaneous		(2,751	)		(2,551	)
Properties, plants and equipment		(396,911	)		(383,612	)
Total deferred tax liabilities		(399,662	)		(386,163	)
Net deferred tax liability	$	(104,144	)	$	(153,179	)

Summary of Positions for which Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Table Text Block]

	2021			2020			2019
Balance at beginning of year	$	(77,210	)	$	(86,634	)	$	(94,981	)
Valuation allowance on deferred tax assets acquired with the Klondex acquisition		—			—			5,905
(Increase) decrease related to non-recognition of deferred tax assets due to uncertainty of recovery and (increase) related to non-utilization of net operating loss carryforwards		(20,304	)		786			686
Decrease related to either or a combination of (i) utilization, (ii) release due to future benefit, and (iii) expiration of deferred tax assets as applicable		58,362			8,638			1,756
Balance at end of year	$	(39,152	)	$	(77,210	)	$	(86,634	)