Note 3 - Major Customers and Suppliers (Details Textual) - Revenue Benchmark [Member]	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Customer Concentration Risk [Member]
Number of Major Customers	3	4
Customer Concentration Risk [Member] | Three Major Customers [Member]
Concentration Risk, Percentage	76.00%
Customer Concentration Risk [Member] | Four Major Customers [Member]
Concentration Risk, Percentage		75.00%
Product Concentration Risk [Member] | Basic Natural and Chemically Modified Cyclodexterins [Member]
Concentration Risk, Percentage	94.00%	99.70%
Product Concentration Risk [Member] | Cyclodexterin Complexes [Member]
Concentration Risk, Percentage	6.00%	3.00%