Note 11 - Concentrations (Details Textual)	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2020	Dec. 31, 2019
Customer Concentration Risk [Member] | Revenue Benchmark [Member]
Number of Distributors	1	1	1
Number of Major Customers	0	0	1
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | One Distributor [Member]
Concentration Risk, Percentage	16.00%	18.00%	17.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member]
Number of Distributors	2	1
Number of Major Customers	2	2
Customer Concentration Risk [Member] | Accounts Receivable [Member] | One Distributor [Member]
Concentration Risk, Percentage	20.00%	8.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Two Distributor [Member]
Concentration Risk, Percentage	10.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Customer One[Member]
Concentration Risk, Percentage	14.00%	23.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Customer Two [Member]
Concentration Risk, Percentage	13.00%	20.00%
Customer Concentration Risk [Member] | Cost of Goods and Service, Product and Service Benchmark [Member] | Raw Materials [Member]
Concentration Risk, Percentage	21.00%
Number of Vendors	1
Supplier Concentration Risk [Member] | Cost of Goods and Service, Product and Service Benchmark [Member] | Raw Materials [Member]
Concentration Risk, Percentage		23.00%	27.00%
Number of Vendors		1	1
Supplier Concentration Risk [Member] | Cost of Goods and Service, Product and Service Benchmark [Member] | Packaging Materials [Member]
Concentration Risk, Percentage	84.00%	88.00%	80.00%
Number of Vendors	5	5	3
Maximum [Member]
Cash, FDIC Insured Amount	$ 250,000