Note 9 - Short-term Borrowings (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

Schedule of Short-term Debt [Table Text Block]

	2018		2017
Overnight repurchase agreements with customers	$	2,084,157	$	7,003,122
Federal funds purchased		26,690,000		6,990,000
	$	28,774,157	$	13,993,122

Schedule of Repurchase Agreements [Table Text Block]

Information concerning overnight repurchase agreements with customers is summarized as follows as of December 31, 2018 and 2017:

	2018			2017
Average daily balance during the period	$	7,830,860		$	7,475,824
Average daily interest rate during the period		0.38	%		0.08	%
Maximum month-end balance during the period	$	10,391,529		$	11,829,201
Weighted average rate as of end of period		0.90	%		0.15	%

Information concerning federal funds purchased is summarized as follows as of December 31, 2018 and 2017:

	2018			2017
Average daily balance during the period	$	13,059,102		$	13,486,239
Average daily interest rate during the period		2.18	%		1.31	%
Maximum month-end balance during the period	$	32,330,000		$	33,650,000
Weighted average rate as of end of period		2.46	%		1.24	%

Securities Sold under Agreements to Repurchase [Member]

Notes Tables

Schedule of Underlying Assets of Repurchase Agreements when Amount of Repurchase Agreements Exceeds 10 Percent of Assets [Table Text Block]

	2018		2017
U.S. govt. sponsored agency securities	$	3,661,995	$	2,077,702
Residential mortgage-backed and related securities		20,654,345		18,816,280
Total securities pledged to overnight customer repurchase agreements		24,316,340		20,893,982
Less: overcollateralized position		22,232,183		13,890,860
	$	2,084,157	$	7,003,122