Note 7 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Income Tax Expense (Benefit), Total	$ 0	$ (661,658)
Valuation Allowance Percentage		100.00%
Unrecognized Tax Benefits, Ending Balance	0
Domestic Tax Authority [Member]
Operating Loss Carryforwards	316,548,085	$ 308,990,822
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	254,897,407	259,490,005
Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration	60,829,929	49,500,817
Operating Loss Carryforwards, Valuation Allowance	66,733,005	62,034,750
State and Local Jurisdiction [Member]
Operating Loss Carryforwards	232,097,127	227,277,399
Operating Loss Carryforwards, Valuation Allowance	$ 14,190,055	$ 23,145,374