Note 5 - Revenue Recognition - Revenue by Geographic Region (Details) - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Gross Sales		$ 3,317,370	$ 3,344,374	$ 9,777,086	$ 10,666,525
UNITED STATES
Gross Sales	[1]	2,763,003	2,729,992	7,912,571	8,723,224
Non-US [Member]
Gross Sales		$ 554,367	$ 614,382	$ 1,864,515	$ 1,943,301

[1] U.S.-based Ashland Specialty Ingredients ("ASI") is the largest of six marketing partners the Company uses to market and distribute some of its products. Although a significant percentage of ASI's purchases from the Company are sold to foreign customers, all sales to ASI are considered U.S. sales for financial reporting purposes, since all shipments to ASI are shipped to ASI's warehouses in the U.S. A significant percentage of the products are subsequently shipped by ASI to foreign customers. Based on sales information provided to the Company by ASI, in the third quarter of 2019 approximately 83% of ASI's sales of the Company's products were to foreign customers, with China representing 46% of ASI's total sales of the Company's products. By comparison, in the third quarter of 2018 approximately 86% of ASI's sales of the Company's products were to foreign customers, with China representing 49% of ASI's total sales of the Company's products. For the first nine months of 2019, approximately 74% of ASI's sales of the Company's products were to foreign customers, with China representing 50% of ASI's total sales of the Company's products. By comparison, in the first nine months of 2018 approximately 72% of ASI's sales of the Company's products were to foreign customers, with China representing 53% of ASI's total sales of the Company's products.