Note 5 - Revenue Recognition - Revenue by Geographic Region (Details) - USD ($)		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Gross Sales		$ 3,279,399	$ 3,885,887	$ 6,459,716	$ 7,322,151
UNITED STATES
Gross Sales	[1]	2,590,643	3,219,414	5,149,548	6,046,913
Non-US [Member]
Gross Sales		$ 688,756	$ 666,473	$ 1,310,168	$ 1,275,238

[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 second quarter of 2019 approximately 70% of ASI's sales of the Company's products were to foreign customers, with China representing 54% of ASI's total sales of the Company's products. By comparison, in the second quarter of 2018 approximately 77% of ASI's sales of the Company's products were to foreign customers, with China representing 62% of ASI's total sales of the Company's products. For the first six months of 2019, approximately 75% of ASI's sales of the Company's products were to foreign customers, with China representing 52% of ASI's total sales of the Company's products. By comparison, in the first six months of 2018 approximately 73% of ASI's sales of the Company's products were to foreign customers, with China representing 54% of ASI's total sales of the Company's products.