Note 1 - Summary of Significant Accounting Policies - Net Sales by Geographical Region (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenue, Percentage	100.00%	100.00%
Revenue	$ 4,011,519	$ 3,637,236
Reportable Geographical Components [Member] | Americas [Member]
Revenue, Percentage	9.00%	4.00%
Revenue	$ 333,530	$ 139,307
Reportable Geographical Components [Member] | Asia Pacific [Member]
Revenue, Percentage	11.00%	23.00%
Revenue	$ 451,895	$ 835,365
Reportable Geographical Components [Member] | Europe [Member]
Revenue, Percentage	77.00%	73.00%
Revenue	$ 3,099,785	$ 2,662,564
Reportable Geographical Components [Member] | Middle East and Africa [Member]
Revenue, Percentage	3.00%	0.00%
Revenue	$ 126,309	$ 0