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PROPERTY, PLANT, AND EQUIPMENT | 12 Months Ended
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Dec. 31, 2025
PROPERTY, PLANT, AND EQUIPMENT |
PROPERTY, PLANT, AND EQUIPMENT | 5. PROPERTY, PLANT, AND EQUIPMENT Property, plant, and equipment consist of the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ | ​ ​ ​ | 2025 | ​ ​ ​ | 2024
​ | ​ | ​ | ​ | ​ | ​ | ​
Land | ​ | $ | 261,893 | ​ | $ | 261,893
Buildings and building improvements | ​ |  | 38,322,742 | ​ |  | 38,280,191
Production equipment | ​ |  | 89,452,771 | ​ |  | 88,347,336
Office furniture and equipment | ​ |  | 5,264,835 | ​ |  | 5,267,203
Construction in progress | ​ |  | 911,145 | ​ |  | 2,475,485
​ | ​ |  | 134,213,386 | ​ |  | 134,632,108
Accumulated depreciation | ​ |  | (55,033,337) | ​ |  | (47,283,590)
​ | ​ | $ | 79,180,049 | ​ | $ | 87,348,518
​ Depreciation expense for the years ended December 31, 2025, 2024, and 2023 was $7.8 million; $7.6 million; and $7.5 million, respectively.

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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 + Details
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