Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Cash and Cash Equivalents, at Carrying Value, Total	$ 25,115,561		$ 28,202,615
Long-term Debt, Total	0
Accounts Receivable, Allowance for Credit Loss, Current	0		0
Accounts Receivable, after Allowance for Credit Loss, Total	264,966		354,196
Contract with Customer, Liability, Total	182,626		$ 186,951
Research and Development Expense, Total	68,219	$ 93,629
Income Tax Expense (Benefit), Total	0
Unrecognized Tax Benefits, Ending Balance	$ 0