Note 2 - Fair Value Measurements - Fair Value of Assets and Liabilities on a Recurring Basis (Details) - Fair Value, Recurring [Member] - USD ($)	Sep. 30, 2023	Dec. 31, 2022
Derivatives	$ 2,109	$ 13,833
Fair Value, Inputs, Level 1 [Member]
Derivatives	0	0
Fair Value, Inputs, Level 2 [Member]
Derivatives	0	0
Fair Value, Inputs, Level 3 [Member]
Derivatives	$ 2,109	$ 13,833