Note 12 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	34.00%
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability		$ 410,391
Income Tax Expense (Benefit),Adjustment of Deferred Tax (Asset) Liability for Unrealized Losses on Available for Sale Securities		$ 64,801