Note 15 - Income Taxes (Details Textual) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Retained Earnings (Accumulated Deficit), Ending Balance	$ 77,073,707	$ 72,860,750
Operating Loss Carryforwards, Total	1,900,000
Allocation of Income to Bad Debt Deductions for Tax Purposes Only [Member]
Retained Earnings (Accumulated Deficit), Ending Balance	5,075,000	5,075,000
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Bad Debt Reserve for Tax Purposes of Qualified Lender	0	$ 0
Unrecognized Tax Benefits, Ending Balance	$ 1,218,000