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Note 6 - Property, Plant and Equipment, Net (Details Textual) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024
Asset Impairment Charges | [1] | $ 2,667,100 | $ 0
Property, Plant and Equipment, Net | [2] | 21,074,694 | 25,349,019
Property, Plant and Equipment, Disposals |  | 3,076,911 | 130,365
Gain (Loss) on Disposition of Property Plant Equipment |  | (106,350) | (15,391)
Depreciation |  | 2,710,497 | 2,668,077
Property, Plant, and Equipment, Idle Assets, Impairment |  |  | 0
Idle Assets [Member] |  |  |
Asset Impairment Charges |  | 0 |
Property, Plant and Equipment, Net |  | 12,300,000 |
Equipment for Retain in House [Member] |  |  |
Construction in Progress, Gross |  |  | $ 2,316,951
Property, Plant, and Equipment, Fair Value Disclosure |  | $ 200,000 |
[1] | During the year ended December 31, 2025, the Company determined that certain machinery previously assigned to the Re-Tain® business no longer had a future use to the Company or any specific undiscounted cash flows other than estimated proceeds from the expected sale. As a result, the Company recognized an impairment charge on the machinery to write-down their cost to their estimated fair value.
[2] | As of December 31, 2025, property, plant and equipment, net includes approximately $12,300,000 of idle assets, which primarily related to one of the Company's manufacturing facilities that was previously utilized for Re-Tain® that we now plan to refit for use in producing First Defense® products. We are monitoring these assets for impairment. No impairment was recognized on these assets during the years ended December 31, 2025 or 2024.

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