Note 1 - Organization and Summary of Significant Accounting Policies - Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Prepaid insurance	$ 148,734	$ 326,712
Prepaid expenses - other	86,011	45,839
Prepaid research and development expenses	8,580	0
Prepaid taxes	845	3,279
Prepaid Expense and Other Assets, Current	$ 244,170	$ 375,830