SELF INSURANCE (Details) $ in Thousands	Dec. 31, 2024 USD ($) item	Dec. 31, 2023 USD ($) item
Self Insurance [Line Items]
Total lease liability	$ 664	$ 712
Maximum liability per workers' compensation claim	1,000
Maximum annual liability for workers' compensation claims	4,000
Workers' compensation claims restricted cash	4,921	4,281
Workers' compensation reserve	$ 4,300	$ 3,600
Mining Properties and Mineral Rights [Member]
Self Insurance [Line Items]
Number of mining units | item	4	7
Geographic spread of mining units (in miles) | item	7	11
Total lease liability	$ 227,800	$ 262,000
Future Workers' Compensation Claim Payments [Member]
Self Insurance [Line Items]
Workers' compensation claims restricted cash	$ 3,400	$ 3,800