Note 3 - Summary of Significant Accounting Policies - Fair Value of Marketable Securities (Details) - USD ($)	Mar. 31, 2024	Dec. 31, 2023
Marketable Securities	$ 1,000,000	$ 2,976,573
Estimate of Fair Value Measurement [Member]
Marketable Securities	1,000,000	2,976,573
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Marketable Securities	1,000,000	2,976,573
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Marketable Securities	0	0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Marketable Securities	$ 0	$ 0