Note 3 - Revenue from Contracts with Customers - Deferred Costs of Revenue Balances Included in Prepaid Expenses (Details) - USD ($)	3 Months Ended
	Jun. 30, 2022	Mar. 31, 2022
Balance, deferred costs of revenue	$ 101,656	$ 154,218
Deferred costs added	(53,434)	2,800
Deferred costs expensed		(55,362)
Balance, deferred costs of revenue	$ 48,222	$ 101,656