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Property, Plant and Equipment, net

9 Months Ended

Sep. 30, 2025

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment, net

Property, Plant and Equipment, net

Net property, plant and equipment consisted of:

			September 30, 2025						December 31, 2024
Machinery, equipment and tooling			$	47,305					$	43,041
SmartSystems			32,583						32,551
Vehicles			4,201						3,961
Furniture and fixtures			1,420						1,368
Plant and building			222,768						218,546
Real estate properties			7,726						7,161
Railroad and sidings			36,676						35,728
Land and land improvements			40,627						40,627
Asset retirement obligations			23,283						23,283
Mineral properties			7,442						7,442
Deferred mining costs			6,067						4,434
Construction in progress			2,788						3,216
			432,886						421,358
Less: accumulated depreciation and depletion			205,248						184,666
Total property, plant and equipment, net			$	227,638					$	236,692

Depreciation expense was $6,971 and $6,946 for the three months ended September 30, 2025 and 2024, respectively, and $20,995 and $20,924 for the nine months ended September 30, 2025 and 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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