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Note 16 - Segment Information - Total Assets, Depreciation and Amortization, and Capital Expenditures (Details) - USD ($)
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Dec. 31, 2023
Total Assets $ 45,730,123 $ 44,448,873 $ 45,730,123 $ 44,448,873 $ 45,100,477 $ 43,808,102
Depreciation and amortization 708,667 685,927 2,074,477 2,045,192 2,729,847 2,739,620
Capital Expenditures 593,924 88,412 1,078,133 269,509 465,725 1,892,513
Operating Segments [Member] | Corporate Segment, Scours [Member]            
Total Assets 26,039,474 23,672,583 26,039,474 23,672,583 24,644,294 24,735,413
Depreciation and amortization 377,484 346,430 1,075,518 1,027,711 1,373,815 1,365,988
Capital Expenditures 582,304 87,286 1,056,490 220,098 409,696 1,096,819
Operating Segments [Member] | Corporate Segment, Mastitis [Member]            
Total Assets 15,610,993 16,798,955 15,610,993 16,798,955 16,523,048 17,827,839
Depreciation and amortization 313,719 319,815 942,553 958,260 1,277,218 1,287,600
Capital Expenditures 11,020 1,126 18,772 49,411 53,721 795,694
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member]            
Total Assets 4,079,656 3,977,335 4,079,656 3,977,335 3,933,135 1,244,850
Depreciation and amortization 17,464 19,682 56,406 59,221 78,814 86,032
Capital Expenditures $ 600 $ 0 $ 2,871 $ 0 $ 2,308 $ 0