Note 3 - Major Customers and Suppliers (Details Textual) - Revenue Benchmark [Member]	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Customer Concentration Risk [Member]
Number of Major Customers			3	2
Customer Concentration Risk [Member] | Three Major Customers [Member]
Concentration Risk, Percentage			64.00%
Customer Concentration Risk [Member] | Two Major Customer [Member ]
Concentration Risk, Percentage				60.00%
Product Concentration Risk [Member] | Cyclodexterin Complexes [Member]
Concentration Risk, Percentage	5.00%		5.00%
Product Concentration Risk [Member] | Basic Natural and Chemically Modified Cyclodexterins [Member]
Concentration Risk, Percentage	95.00%	100.00%	96.00%	94.00%
Product Concentration Risk [Member] | Biopharmaceuticals [Member]
Concentration Risk, Percentage				6.00%