Note 1 - Description of Business and Significant Accounting Policies - Adoption of New Accounting Standard (Details) - USD ($)	Dec. 31, 2023	Jan. 01, 2023	Dec. 31, 2022
Balance, accumulated deficit	$ (10,491,934)		$ (11,819,637)
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Balance, accumulated deficit		$ (150,373)
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Accounting Standards Update 2016-13 [Member]
Balance, accumulated deficit		$ (11,970,010)