Note 3 - Major Customers and Suppliers (Details Textual)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Number of Major Customers	3	3
Revenue Benchmark [Member] | Customer Concentration Risk [Member]
Number of Major Customers	4	4
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Four Major Customer [Member]
Concentration Risk, Percentage	70.00%	57.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Four Major Customer [Member]
Concentration Risk, Percentage	95.00%	31.00%
Revenue, Product and Service Benchmark [Member] | Product Concentration Risk [Member] | Biopharmaceuticals [Member]
Concentration Risk, Percentage	10.00%	17.00%
Revenue, Product and Service Benchmark [Member] | Product Concentration Risk [Member] | Basic Natural and Chemically Modified Cyclodexterins [Member]
Concentration Risk, Percentage	75.00%	71.00%
Revenue, Product and Service Benchmark [Member] | Product Concentration Risk [Member] | Cyclodexterin Complexes [Member]
Concentration Risk, Percentage	15.00%	12.00%