Note 10 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Retained Earnings (Accumulated Deficit)		$ 60,679,308	$ 57,347,282
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		34.00%	34.00%	34.00%
Scenario, Forecast [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%
Allocation of Income to Bad Debt Deductions for Tax Purposes Only [Member]
Retained Earnings (Accumulated Deficit)		$ 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		$ 1,294,000	$ 1,878,000