Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2022

Property, Plant and Equipment

Schedule of components of property, plant and equipment

	December 31,		December 31,
	2022		2021
	(in thousands)
Mineral properties	$	9,353	$	9,353
Exploration properties		2,418		2,418
Royalty properties		200		200
Buildings		3,808		3,806
Mining equipment and machinery		17,127		17,477
Other furniture and equipment		1,355		1,328
Asset retirement cost		1,157		1,057
		35,418		35,639
Less: Accumulated depreciation and amortization		(29,002)		(29,012)
	$	6,416	$	6,627