Note 3 - Revenue From Contracts With Customers (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Accounts Receivable, Allowance for Credit Loss, Ending Balance	$ 0		$ 0		$ 0
Contract with Customer, Liability, Revenue Recognized	$ 31,237	$ 55,665	$ 85,035	$ 110,753