LONG-TERM DEBT - Schedule of Long-Term Debt (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Long-Term Debt Instrument [Roll Forward]
Beginning Balance	$ 191,397	$ 194,112	$ 194,112
Additions and adjustments	(2,079)		(2,118)
Amortization of finance costs	346	313	1,386
Principal repayment	(47)		(33,092)
Finance charge	7,858		31,109
Ending Balance	197,475		191,397
Less current portion	40,825		37,842
Long-term debt	156,650		153,555
Gold Prepay - gold price derivative
Long-Term Debt Instrument [Roll Forward]
Beginning Balance	31,718	42,176	42,176
Additions and adjustments	(43)		(1,777)
Amortization of finance costs	25		110
Principal repayment	0		(19,843)
Finance charge	2,470		11,052
Ending Balance	34,170		31,718
Less current portion	27,870
Long-term debt	6,300
Silver Purchase Agreement - silver price derivative
Long-Term Debt Instrument [Roll Forward]
Beginning Balance	23,574	29,662	29,662
Additions and adjustments	(43)		(731)
Amortization of finance costs	0		26
Principal repayment	0		(8,508)
Finance charge	1,245		3,125
Ending Balance	24,776		23,574
Less current portion	7,255
Long-term debt	17,521
Convertible Loans | Orion Convertible Loan
Long-Term Debt Instrument [Roll Forward]
Beginning Balance	57,121	46,764	46,764
Additions and adjustments	(1,714)		0
Amortization of finance costs	112		581
Principal repayment	0		0
Finance charge	2,420		9,776
Ending Balance	57,939		57,121
Less current portion	0
Long-term debt	57,939
Convertible Loans | Sprott Convertible Loan
Long-Term Debt Instrument [Roll Forward]
Beginning Balance	5,459	8,288	8,288
Additions and adjustments	0		390
Amortization of finance costs	0		0
Principal repayment	0		(4,534)
Finance charge	219		1,315
Ending Balance	5,678		5,459
Less current portion	5,678
Long-term debt	0
Convertible Loans | Convertible Debentures
Long-Term Debt Instrument [Roll Forward]
Beginning Balance	73,450	66,940	66,940
Additions and adjustments	(279)		0
Amortization of finance costs	209		669
Principal repayment	0		0
Finance charge	1,504		5,841
Ending Balance	74,884		73,450
Less current portion	0
Long-term debt	74,884
Other
Long-Term Debt Instrument [Roll Forward]
Beginning Balance	75	$ 282	282
Additions and adjustments	0		0
Amortization of finance costs	0		0
Principal repayment	(47)		(207)
Finance charge	0		0
Ending Balance	28		$ 75
Less current portion	22
Long-term debt	$ 6