Note 4 - Loans and Allowance for Loan Losses - COVID-19 Modifications (Details)	Dec. 31, 2020 USD ($)
# Loans Modified	20
Amount of Loans Modified	$ 28,557,924
Interest Only 3 Months or Less [Member]
Amount of Loans Modified	123,236
Interest Only 4 to 6 Months [Member]
Amount of Loans Modified	380,893
Full Payment Deferral 3 Months [Member]
Amount of Loans Modified	168,852
Full Payment Deferral 3 Months + Interest Only 3 Months or Less [Member]
Amount of Loans Modified	1,849,520
Full Payment Deferral 3 Months + Interest Only > 3 Months [Member]
Amount of Loans Modified	13,069,728
Full Payment Deferral > 6 Months [Member]
Amount of Loans Modified	$ 12,965,695
Hotel/Motel [Member]
# Loans Modified	9
Amount of Loans Modified	$ 16,018,273
Hotel/Motel [Member] | Interest Only 3 Months or Less [Member]
Amount of Loans Modified	0
Hotel/Motel [Member] | Interest Only 4 to 6 Months [Member]
Amount of Loans Modified	0
Hotel/Motel [Member] | Full Payment Deferral 3 Months [Member]
Amount of Loans Modified	0
Hotel/Motel [Member] | Full Payment Deferral 3 Months + Interest Only 3 Months or Less [Member]
Amount of Loans Modified	1,849,520
Hotel/Motel [Member] | Full Payment Deferral 3 Months + Interest Only > 3 Months [Member]
Amount of Loans Modified	7,962,876
Hotel/Motel [Member] | Full Payment Deferral > 6 Months [Member]
Amount of Loans Modified	$ 6,205,877
Theatre [Member]
# Loans Modified	5
Amount of Loans Modified	$ 10,586,792
Theatre [Member] | Interest Only 3 Months or Less [Member]
Amount of Loans Modified	0
Theatre [Member] | Interest Only 4 to 6 Months [Member]
Amount of Loans Modified	0
Theatre [Member] | Full Payment Deferral 3 Months [Member]
Amount of Loans Modified	0
Theatre [Member] | Full Payment Deferral 3 Months + Interest Only 3 Months or Less [Member]
Amount of Loans Modified	0
Theatre [Member] | Full Payment Deferral 3 Months + Interest Only > 3 Months [Member]
Amount of Loans Modified	3,826,974
Theatre [Member] | Full Payment Deferral > 6 Months [Member]
Amount of Loans Modified	$ 6,759,818
Restaurant (C&I & RE) [Member]
# Loans Modified	2
Amount of Loans Modified	$ 411,029
Restaurant (C&I & RE) [Member] | Interest Only 3 Months or Less [Member]
Amount of Loans Modified	123,236
Restaurant (C&I & RE) [Member] | Interest Only 4 to 6 Months [Member]
Amount of Loans Modified	287,793
Restaurant (C&I & RE) [Member] | Full Payment Deferral 3 Months [Member]
Amount of Loans Modified	0
Restaurant (C&I & RE) [Member] | Full Payment Deferral 3 Months + Interest Only 3 Months or Less [Member]
Amount of Loans Modified	0
Restaurant (C&I & RE) [Member] | Full Payment Deferral 3 Months + Interest Only > 3 Months [Member]
Amount of Loans Modified	0
Restaurant (C&I & RE) [Member] | Full Payment Deferral > 6 Months [Member]
Amount of Loans Modified	$ 0
Land & Land Development [Member]
# Loans Modified	1
Amount of Loans Modified	$ 1,279,878
Land & Land Development [Member] | Interest Only 3 Months or Less [Member]
Amount of Loans Modified	0
Land & Land Development [Member] | Interest Only 4 to 6 Months [Member]
Amount of Loans Modified	0
Land & Land Development [Member] | Full Payment Deferral 3 Months [Member]
Amount of Loans Modified	0
Land & Land Development [Member] | Full Payment Deferral 3 Months + Interest Only 3 Months or Less [Member]
Amount of Loans Modified	0
Land & Land Development [Member] | Full Payment Deferral 3 Months + Interest Only > 3 Months [Member]
Amount of Loans Modified	1,279,878
Land & Land Development [Member] | Full Payment Deferral > 6 Months [Member]
Amount of Loans Modified	$ 0
The 1-4 Family Consumer [Member]
# Loans Modified	2
Amount of Loans Modified	$ 168,852
The 1-4 Family Consumer [Member] | Interest Only 3 Months or Less [Member]
Amount of Loans Modified	0
The 1-4 Family Consumer [Member] | Interest Only 4 to 6 Months [Member]
Amount of Loans Modified	0
The 1-4 Family Consumer [Member] | Full Payment Deferral 3 Months [Member]
Amount of Loans Modified	168,852
The 1-4 Family Consumer [Member] | Full Payment Deferral 3 Months + Interest Only 3 Months or Less [Member]
Amount of Loans Modified	0
The 1-4 Family Consumer [Member] | Full Payment Deferral 3 Months + Interest Only > 3 Months [Member]
Amount of Loans Modified	0
The 1-4 Family Consumer [Member] | Full Payment Deferral > 6 Months [Member]
Amount of Loans Modified	$ 0
Other Collateral [Member]
# Loans Modified	1
Amount of Loans Modified	$ 93,100
Other Collateral [Member] | Interest Only 3 Months or Less [Member]
Amount of Loans Modified	0
Other Collateral [Member] | Interest Only 4 to 6 Months [Member]
Amount of Loans Modified	93,100
Other Collateral [Member] | Full Payment Deferral 3 Months [Member]
Amount of Loans Modified	0
Other Collateral [Member] | Full Payment Deferral 3 Months + Interest Only 3 Months or Less [Member]
Amount of Loans Modified	0
Other Collateral [Member] | Full Payment Deferral 3 Months + Interest Only > 3 Months [Member]
Amount of Loans Modified	0
Other Collateral [Member] | Full Payment Deferral > 6 Months [Member]
Amount of Loans Modified	$ 0