Note 2 - Summary of Significant Accounting Policies - Trade Accounts Payable and Other Current Liabilities (Details) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
Trade accounts payable	$ 171,084	$ 162,829
Payroll and related expenses	85,642	42,472
Patent monetization expenses	187,201	162,990
Current operating lease liabilities	37,329	39,909
Deferred revenue	91,232	123,451
Professional and other service fees	154,863	172,712
Total trade accounts payable and other current liabilities	$ 727,351	$ 704,363