Note 2 - Revenue from Contracts with Customers (Details Textual) - USD ($)		3 Months Ended				9 Months Ended
	Dec. 31, 2021	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Accounts Receivable, Allowance for Credit Loss, Ending Balance	$ 0	$ 0				$ 0
Contract with Customer, Asset, Contract Assets Added	0		$ 45,895	$ 134,657	$ 131,923	0
Contract with Customer, Liability, Revenue Recognized		48,708	$ 58,556			160,809	$ 946,884
Capitalized Contract Cost, Net, Total	$ 0	$ 0				$ 0