Note 6 - Fair Value (Tables)

6 Months Ended

Jun. 30, 2018

Notes Tables

Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]

			FairValue Measurements at Reporting Date Using
			Quoted Prices		Significant
			in Active		Other		Significant
			Markets for		Observable		Unobservable
			Identical Assets		Inputs		Inputs
	Fair Value		(Level 1)		(Level 2)		(Level 3)
June 30, 2018:
Securities AFS:
U.S. govt. sponsored agency securities	$	35,666,536	$	—	$	35,666,536	$	—
Residential mortgage-backed and related securities		158,534,448		—		158,534,448		—
Municipal securities		59,507,267		—		59,507,267		—
Other securities		4,236,420		—		4,236,420		—
Interest rate caps		706,291		—		706,291		—
Interest rate swaps - assets		6,171,740		—		6,171,740
Total assets measured at fair value	$	264,822,702	$	—	$	264,822,702	$	—
Interest rate swaps - liabilities	$	6,543,790	$	—	$	6,543,790	$	—
Total liabilities measured at fair value	$	6,543,790	$	—	$	6,543,790	$	—
December 31, 2017:
Securities AFS:
U.S. govt. sponsored agency securities	$	38,096,534	$	—	$	38,096,534	$	—
Residential mortgage-backed and related securities		163,301,304		—		163,301,304		—
Municipal securities		66,625,496		—		66,625,496		—
Other securities		4,884,573		1,028		4,883,545		—
Interest rate caps		506,700		—		506,700		—
Interest rate swaps - assets		4,397,238		—		4,397,238
Total assets measured at fair value	$	277,811,845	$	1,028	$	277,810,817	$	—
Interest rate swaps - liabilities	$	4,397,238	$	—	$	4,397,238	$	—
Total liabilities measured at fair value	$	4,397,238	$	—	$	4,397,238	$	—

			Fair Value Measurements at Reporting Date Using
			Quoted Prices		Significant
			in Active		Other		Significant
			Markets for		Observable		Unobservable
			Identical Assets		Inputs		Inputs
	Fair Value		Level 1		Level 2		Level 3
June 30, 2018:
Impaired loans/leases	$	4,674,218	$	—	$	—	$	4,674,218
OREO		13,770,025		—		—		13,770,025
	$	18,444,243	$	—	$	—	$	18,444,243
December 31, 2017:
Impaired loans/leases	$	8,972,337	$	—	$	—	$	8,972,337
OREO		14,642,973		—		—		14,642,973
	$	23,615,310	$	—	$	—	$	23,615,310

Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Table Text Block]

	Quantitative Informationabout Level Fair ValueMeasurements
	Fair Value		Fair Value
	June 30,		December 31,
	2018		2017		Valuation Technique	Unobservable Input	Range
Impaired loans/leases	$	4,674,218	$	8,972,337	Appraisal of collateral	Appraisal adjustments	(10.00)	%	to	(30.00)	%
OREO		13,770,025		14,642,973	Appraisal of collateral	Appraisal adjustments	0.00	%	to	(35.00)	%

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	Fair Value	As of June 30, 2018				As of December 31, 2017
	Hierarchy	Carrying		Estimated		Carrying		Estimated
	Level	Value		Fair Value		Value		Fair Value
Cash and due from banks	Level 1	$	69,069,403	$	69,069,403	$	75,721,663	$	75,721,663
Federal funds sold	Level 2		10,866,000		10,866,000		30,197,000		30,197,000
Interest-bearing deposits at financial institutions	Level 2		40,801,388		40,801,388		55,765,012		55,765,012
Investment securities:
HTM	Level 2		400,052,344		397,252,368		379,474,205		379,749,804
AFS	See Previous Table		257,944,671		257,944,671		272,907,907		272,907,907
Loans/leases receivable, net	Level 3		4,327,980		4,674,218		8,307,719		8,972,337
Loans/leases receivable, net	Level 2		3,072,919,367		3,020,805,000		2,921,821,953		2,892,963,000
Interest rate caps	Level 2		706,291		706,291		506,700		506,700
Interest rate swaps - assets	Level 2		6,171,740		6,171,740		4,397,238		4,397,238
Deposits:
Nonmaturity deposits	Level 2		2,622,243,626		2,622,243,626		2,670,583,178		2,670,583,178
Time deposits	Level 2		676,032,401		677,799,000		596,071,878		591,772,000
Short-term borrowings	Level 2		17,585,605		17,585,605		13,993,122		13,993,122
FHLB advances	Level 2		254,100,000		254,008,000		192,000,000		192,115,000
Other borrowings	Level 2		71,125,000		71,645,000		66,000,000		66,520,000
Junior subordinated debentures	Level 2		37,580,881		29,851,237		37,486,487		29,253,624
Interest rate swaps - liabilities	Level 2		6,543,790		6,543,790		4,397,238		4,397,238