Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
NET INCOME (LOSS)	$ 26,856	$ (14,277)	$ 13,747	$ (70,242)
(Income) Loss from Discontinued Operations, Net of Tax, Attributable to Parent	0	0	0	(5,693)
Adjustments:
Amortization	32,216	45,678	96,254	130,758
Accretion	2,969	3,073	8,724	9,023
Deferred income taxes	(4,515)	(10,545)	(11,547)	(27,962)
Loss on debt extinguishment	0	1,282	0	1,282
Fair value adjustments, net	(2,243)	(4,377)	(3,491)	(8,201)
Stock-based compensation	1,969	2,432	6,269	6,642
Gain on Modification of Lease	0	0	(4,051)	0
Inventory Write-down	1,232	13,966	16,821	41,285
Revenue Recognized	(5,485)	(15,250)	(21,167)	(16,008)
Foreign exchange and other	4,379	8,994	2,374	15,733
Changes in operating assets and liabilities:
Receivables	(1,497)	(3,350)	(3,846)	(20,709)
Prepaid expenses and other current assets	(1,921)	1,375	(1,186)	(2,143)
Inventories	(3,066)	(9,389)	(33,047)	(42,601)
Accounts payable and accrued liabilities	28,570	22,384	15,566	41,421
CASH PROVIDED BY OPERATING ACTIVITIES CONTINUING OPERATIONS	79,464	41,996	81,420	52,585
Cash provided by (used in) activities of discontinued operations	0	0	0	0
Cash provided by (used in) operating activities	79,464	41,996	81,420	52,585
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(22,996)	(30,678)	(61,886)	(78,865)
Proceeds from the sale of assets	730	26	5,245	930
Purchase of investments	(2,500)	0	(2,500)	0
Sale of investments	0	1,007	19,802	2,109
Proceeds from Collection of Notes Receivable	0	0	0	7,168
Other	(25)	(57)	(225)	1,961
Net Cash Provided by (Used in) Investing Activities, Continuing Operations	(24,791)	(29,702)	(39,564)	(66,697)
Cash provided by (used in) activities of discontinued operations	0	0	0	0
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	(24,791)	(29,702)	(39,564)	(66,697)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from Issuance of Common Stock	0	73,781	0	122,668
Issuance of notes and bank borrowings, net of issuance costs	0	30,000	150,000	45,000
Payments on long-term debt, capital leases, and associated costs	(48,557)	(87,778)	(150,171)	(201,051)
Gold production royalty payments	0	0	(18,750)	0
Other	114	301	(1,718)	(2,958)
Cash provided by (used in) activities of continuing operations	(48,443)	16,304	(20,639)	(36,341)
Cash provided by (used in) activities of discontinued operations	0	0	0	0
Cash provided by (used in) activities of discontinued operations	(48,443)	16,304	(20,639)	(36,341)
Effect of exchange rate changes on cash and cash equivalents	(10)	(192)	293	65
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	6,220	28,406	21,510	(50,388)
Less net cash provided by (used in) discontinued operations	0	0	0	0
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	6,220	28,406	21,510	(50,388)
Cash, cash equivalents and restricted cash at beginning of period	72,308	39,275	57,018	118,069
Cash, cash equivalents and restricted cash at end of period	$ 78,528	$ 67,681	$ 78,528	$ 67,681