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Note 7 - Revenue Recognition (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Allowance for Material Returns $ 268,242   $ 268,242   $ 247,847
Contract with Customer, Liability, Current $ 0   $ 0   $ 15,498
Cosmetic Ingredients [Member] | Non-US [Member] | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]          
Concentration Risk, Percentage 17.00% 22.00% 15.00% 23.00%  
ASI [Member] | Non-US [Member] | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]          
Concentration Risk, Percentage 85.00% 65.00% 84.00% 68.00%  
ASI [Member] | CHINA | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]          
Concentration Risk, Percentage 56.00% 35.00% 50.00% 29.00%