Note 3 - Investment Securities (Details) - USD ($)	3 Months Ended
Mar. 31, 2019	Dec. 31, 2018
Details
Basis for Valuation, Debt Securities	Debt securities available-for-sale are carried at estimated fair value. Debt securities designated as 'Held to Maturity' are carried at amortized cost based on Management's intent and ability to hold such securities to maturity.
Gross unrealized losses on investment securities	$ 798,088	$ 4,415,799

Represents the monetary amount of Gross unrealized losses on investment securities, as of the indicated date.

No definition available.

Name:	fil_GrossUnrealizedLossesOnInvestmentSecurities
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant