Note 6 - Stock Subscriptions and Other Receivables and Concentrations of Credit Risk - Accounts and Other Receivables (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Accounts and other receivables	$ 92,992	$ 2,987,319
Related Party Receivables [Member]
Accounts and other receivables	86,796	0
Stock Subscriptions [Member]
Accounts and other receivables	0	2,925,000
License Revenue Receivable [Member]
Accounts and other receivables	1,021	58,754
Grant Revenue Receivable [Member]
Accounts and other receivables	919	1,117
Other Accounts Receivable [Member]
Accounts and other receivables	$ 4,256	$ 2,448