CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Cash paid to suppliers and employees	$ (126,784)	$ (95,871)	$ (52,340)
Cash flow from revenues	128,822	67,724	59,517
Interest paid	(1,923)		(5)
Interest received	372	501	276
Cash provided by (used in) operating activities	487	(27,646)	7,448
Cash flows from investing activities:
Additions to mineral property interests	(18,983)	(3,492)	(5,985)
Additions to property and equipment (including construction in progress)	(62,338)	(5,077)	(1,174)
Proceeds from disposal of property and equipment	84	33	994
Additions to investments (note 3)	(1,384)		(4,419)
Proceeds from sale of investments (note 3)	2,895	2,155	470
Return of investment received from Minera Santa Cruz S.A. (note 2 and note 7)	10,385	12,212	17,738
Cash (used in) provided by investing activities	(69,341)	(22,260)	7,624
Cash flows from financing activities:
Shareholders' distribution (note 10)	(3,372)	(3,059)	(2,986)
Proceeds of exercise of stock options (note 10)	192	121	3,730
Proceeds of loan from related party (note 14 and note 22)	25,000
Proceeds of loan (note 22)	25,000
Debt issuance costs and lender fees (note 22)	(908)
Proceeds of at-the-market common share issuance (note 10)	918
Principal repayments on capital leases (note 20)	(485)
Proceeds from equity sale (note 10)		42,453
Proceeds from warrants sale (note 10)		4,122
Share and warrant issuance costs (note 10)		(3,353)
Sale of flow-through common shares (note 10)	14,846	9,994
Flow-through common share issuance costs (note 10)	(751)	(551)
Repayment of short-term bank indebtedness			(3,395)
Share repurchase (note 10)			(582)
Cash provided by (used in) financing activities	60,440	49,727	(3,233)
Effect of exchange rate change on cash and cash equivalents	1,750	(108)	(273)
(Decrease) increase in cash, cash equivalents and restricted cash	(6,664)	(287)	11,566
Cash, cash equivalents and restricted cash, beginning of period	37,153	37,440	25,874
Cash, cash equivalents and restricted cash, end of period (note 21)	30,489	37,153	37,440
Reconciliation of net (loss) income to cash provided by (used in) operating activities:
Net (loss) income	(44,870)	(10,634)	21,055
Adjustments to reconcile net (loss) income from operating activities:
Loss (income) from investment in Minera Santa Cruz S.A., net of amortization (note 7)	11,865	44	(12,951)
Impairment of property and equipment (note 6)		711
Loss (gain) on investments (note 3)	3,324	(257)	(519)
Loss (gain) on disposal of fixed assets	77	(11)	517
Income and mining tax recovery (note 9)	(2,770)	(15,675)	(3,749)
Stock-based compensation (note 11)	269	1,309	1,039
Depreciation	9,169	3,378	1,169
Revision of estimates and accretion of asset reclamation obligations (note 8)	3,464	2,061	595
Adjustment to the asset retirement obligation estimate (note 8)	(1,903)	1,008	1,530
Amortization of mineral property interests and asset retirement obligations	7,256	3,198	2,413
Foreign exchange (loss) gain	(1,750)	108	273
Change in non-cash working capital items:
(Increase) decrease in VAT taxes receivable, net of collection of $8,274 (2017 - $5,864)	4,192	(945)	5,813
(Increase) decrease in other assets related to operations	16,704	(12,756)	(11,156)
Increase (decrease) in liabilities related to operations	(4,540)	815	1,419
Cash provided by (used in) operating activities	$ 487	(27,646)	$ 7,448
Lexam VG Gold
Cash flows from investing activities:
Acquisition costs, net of cash and cash equivalents acquired		(840)
Black Fox
Cash flows from investing activities:
Acquisition costs, net of cash and cash equivalents acquired		$ (27,251)