Note 3 - Revenue From Contracts With Customers - Deferred Costs of Revenue Balances Included in Prepaid Expenses (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Balance, deferred costs of revenue	$ 156,719	$ 154,218
Deferred costs added	100,098	223,148
Deferred costs expensed	(168,829)	(220,647)
Balance, deferred costs of revenue	$ 87,988	$ 156,719