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Property, Plant, and Mine Development, net

9 Months Ended

Sep. 30, 2025

Property, Plant, and Mine Development, net

Property, Plant, and Mine Development, net

9. Property, Plant, and Mine Development, net

At September 30, 2025 and December 31, 2024, property, plant, and mine development, net consisted of the following:

​

​	​	​	​	​	​	​
​	​	As of		​	As of
​	​	September 30,		​	December 31,
​	​	2025		​	2024
​	​	(in thousands)
Asset retirement costs (“ARO asset”)	​	$	6,740	​	$	6,740
Construction-in-progress	​	​	1,532	​	​	1,165
Furniture and office equipment	​	​	1,858	​	​	1,722
Land	​	​	9,033	​	​	9,033
Mineral interest	​	​	79,543	​	​	79,543
Light vehicles and other mobile equipment	​	​	2,134	​	​	2,118
Machinery and equipment	​	​	46,412	​	​	44,858
Mill facilities and infrastructure	​	​	36,456	​	​	36,463
Mine development	​	​	131,382	​	​	120,906
Software and licenses	​	​	1,554	​	​	1,554
Subtotal	​	​	316,644	​	​	304,102
Accumulated depreciation and amortization	​	​	(184,191)	​	​	(175,713)
Total	​	$	132,453	​	$	128,389

​

The Company recorded depreciation and amortization expense of $2.6 million and $7.7 million for the three and nine months ended September 30, 2025, respectively, and $4.2 million and $14.2 million for the three and nine months ended September 30, 2024, respectively.

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- References

No definition available.

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- Definition

The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 360
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/360/tableOfContent

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-SubTopic 360
-Topic 958
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477798/958-360-50-6

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)
-SubTopic 360
-Topic 958
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477798/958-360-50-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-SubTopic 360
-Topic 958
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477798/958-360-50-7

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