Note 13 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Retained Earnings (Accumulated Deficit), Ending Balance	$ 65,829,687	$ 60,679,308
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	35.00%	34.00%
Operating Loss Carryforwards, Total	$ 2,000,000
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	$ 1,294,000