Note 3 - Securities (Tables)

9 Months Ended

Sep. 30, 2017

Notes Tables

Schedule of Available-for-sale Securities Reconciliation [Table Text Block]

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Approximate Fair Value
As of September 30, 2017
Debt Securities:
Municipals	$	34,012,067	$	210,255	$	(328,991	)	$	33,893,331
Corporates		3,000,000		70,000		-			3,070,000
Government sponsored mortgage-backed securities and SBA loan pools		46,936,147		32,472		(726,755	)		46,241,864
	$	83,948,214	$	312,727	$	(1,055,746	)	$	83,205,195

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Approximate Fair Value
As of December 31, 2016
Debt Securities:
Municipals	$	39,357,506	$	65,673	$	(1,085,654	)	$	38,337,525
Corporates		7,003,986		54,050		(4,514	)		7,053,522
Government sponsored mortgage-backed securities and SBA loan pools		48,115,793		19,432		(1,127,037	)		47,008,188
	$	94,477,285	$	139,155	$	(2,217,205	)	$	92,399,235

Available-for-sale Securities [Table Text Block]

	Amortized Cost		Approximate Fair Value
1-5 years		564,554		581,359
6-10 years		9,254,809		9,317,277
After 10 years		27,192,704		27,064,695
Government sponsored mortgage-backed securities and SBA loan pools not due on a single maturity date		46,936,147		46,241,864
	$	83,948,214	$	83,205,195

Held-to-maturity Securities [Table Text Block]

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Approximate Fair Value
As of September 30, 2017
Debt Securities:
Government sponsored mortgage-backed securities	$	18,424	$	215	$	(57	)	$	18,582

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Approximate Fair Value
As of December 31, 2016
Debt Securities:
Government sponsored mortgage-backed securities	$	27,528	$	625	$	-	$	28,153

Schedule of Unrealized Loss on Investments [Table Text Block]

	September 30, 2017
	Less than 12 Months					12 Months or More					Total
Description of Securities	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Municipals	$	10,507,517	$	(91,926	)	$	10,671,807	$	(237,065	)	$	21,179,324	$	(328,991	)
Government sponsored mortgage-backed securities and SBA loan pools		21,281,498		(219,697	)		21,010,832		(507,115	)		42,292,330		(726,812	)
	$	31,789,015	$	(311,623	)	$	31,682,639	$	(744,180	)	$	63,471,654	$	(1,055,803	)

	December 31, 2016
	Less than 12 Months					12 Months or More					Total
Description of Securities	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Municipals	$	33,084,816	$	(1,082,021	)	$	179,402	$	(3,633	)	$	33,264,218	$	(1,085,654	)
Corporates		1,996,172		(3,828	)		881,100		(686	)		2,877,272		(4,514	)
Government sponsored mortgage-backed securities and SBA loan pools		39,570,463		(1,022,511	)		3,649,276		(104,526	)		43,219,739		(1,127,037	)
	$	74,651,451	$	(2,108,360	)	$	4,709,778	$	(108,845	)	$	79,361,229	$	(2,217,205	)

Held-to-maturity Securities [Member]

Notes Tables

Held-to-maturity Securities [Table Text Block]

	Amortized Cost		Approximate Fair Value
Government sponsored mortgage-backed securities not due on a single maturity date	$	18,424	$	18,582