Note 10 - FHLB Advances (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

Schedule of Long-term Debt Instruments [Table Text Block]

	December 31, 2018				December 31, 2017
			Weighted				Weighted
			Average				Average
			Interest Rate				Interest Rate
	Amount Due		at Year-End		Amount Due		at Year-End
Maturity:
Year ending December 31:
2018	$	—	—		$	190,400,000	1.82	%
2019		239,957,672	2.60			—	—
2020		11,484,203	1.74			1,600,000	1.75
2021		15,050,164	2.32			—	—
Total FHLB advances	$	266,492,039	2.55	%	$	192,000,000	1.82	%

Schedule of Prepayments of Federal Home Loan Bank Advances [Table Text Block]

2016
			Weighted
			Average		Range of	Prepayment
Date of Restructuring	Amount		Interest Rate		Maturity Dates	Fees
First Quarter of 2016	$	10,000,000	3.86	%	December 2017	$	524,197
Third Quarter of 2016		5,000,000	2.84	%	February 2018		127,310
Fourth Quarter of 2016		15,000,000	3.14	%	September 2017 to November 2017		357,161
Total for 2016	$	30,000,000	3.33	%		$	1,008,668