Note 6 - Receivables - Accounts and Other Receivables (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Accounts and other receivables	$ 630	$ 92,992
Sales Revenue Receivable [Member[
Accounts and other receivables	610	0
Related Party Receivables [Member]
Accounts and other receivables	0	86,796
License Revenue Receivable [Member]
Accounts and other receivables	0	1,021
Grant Revenue Receivable [Member]
Accounts and other receivables	0	919
Other Accounts Receivable [Member]
Accounts and other receivables	$ 20	$ 4,256