Note 21 - Fair Value (Tables)

12 Months Ended

Dec. 31, 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)
December 31, 2018:
Securities AFS:
U.S. govt. sponsored agency securities	$	36,411,391	$	—	$	36,411,391	$	—
Residential mortgage-backed and related securities		159,249,260		—		159,249,260		—
Municipal securities		58,546,022		—		58,546,022		—
Other securities		6,849,775		—		6,849,775		—
Interest rate caps		458,812		—		458,812		—
Interest rate swaps - assets		22,195,713		—		22,195,713		—
Total assets measured at fair value	$	283,710,973	$	—	$	283,710,973	$	—
Interest rate swaps - liabilities	$	23,346,887	$	—	$	23,346,887	$	—
Total liabilities measured at fair value	$	23,346,887	$	—	$	23,346,887	$	—
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
December 31, 2018:
Impaired loans/leases	$	9,656,912	$	—	$	—	$	9,656,912
OREO		10,127,954		—		—		10,127,954
	$	19,784,866	$	—	$	—	$	19,784,866
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
	December 31,		December 31,
	2018		2017		Valuation Technique	Unobservable Input	Range
Impaired loans/leases	$	9,656,912	$	8,972,337	Appraisal of collateral	Appraisal adjustments	(10.00)	%	to	(30.00)	%
OREO		10,127,954		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 December 31, 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	$	85,522,685	$	85,522,685	$	75,721,663	$	75,721,663
Federal funds sold	Level 2		26,398,000		26,398,000		30,197,000		30,197,000
Interest-bearing deposits at financial institutions	Level 2		133,198,095		133,198,095		55,765,012		55,765,012
Investment securities:
HTM	Level 2		401,912,885		400,770,583		379,474,205		379,749,804
AFS	See Previous Table		261,056,448		261,056,448		272,907,907		272,907,907
Loans/leases receivable, net	Level 3		8,941,585		9,656,912		8,307,719		8,972,337
Loans/leases receivable, net	Level 2		3,683,965,349		3,639,329,000		2,921,821,953		2,892,963,000
Interest rate caps	Level 2		458,812		458,812		506,700		506,700
Interest rate swaps - assets	Level 2		22,195,713		22,195,713		4,397,238		4,397,238
Deposits:
Nonmaturity deposits	Level 2		3,002,326,538		3,002,326,538		2,670,583,178		2,670,583,178
Time deposits	Level 2		974,704,036		968,906,000		596,071,878		591,772,000
Short-term borrowings	Level 2		28,774,157		28,774,157		13,993,122		13,993,122
FHLB advances	Level 2		266,492,039		265,926,000		192,000,000		192,115,000
Other borrowings	Level 2		72,032,318		72,703,000		66,000,000		66,520,000
Junior subordinated debentures	Level 2		37,670,043		29,992,198		37,486,487		29,253,624
Interest rate swaps - liabilities	Level 2		23,346,887		23,346,887		4,397,238		4,397,238