Note 5 - Fair Value (Tables)

3 Months Ended

Mar. 31, 2018

Notes Tables

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

			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)
March 31, 2018:
Securities AFS:
U.S. govt. sponsored agency securities	$	36,867,510	$	-	$	36,867,510	$	-
Residential mortgage-backed and related securities		157,289,043		-		157,289,043		-
Municipal securities		61,201,804		-		61,201,804		-
Other securities		4,286,583		-		4,286,583		-
Interest rate caps		657,178		-		657,178		-
Interest rate swaps - assets		4,500,318		-		4,500,318		-
Total assets measured at fair value	$	264,802,436	$	-	$	264,802,436	$	-
Interest rate swaps - liabilities	$	4,500,318	$	-	$	4,500,318	$	-
Total liabilities measured at fair value	$	4,500,318	$	-	$	4,500,318	$	-
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
	Fair Value		Level 1		Level 2		Level 3
March 31, 2018:
Impaired loans/leases	$	5,564,760	$	-	$	-	$	5,564,760
OREO		13,770,025		-		-		13,770,025
	$	19,334,785	$	-	$	-	$	19,334,785
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 Measurement Inputs and Valuation Techniques [Table Text Block]

	Quantitative Information about Level Fair Value Measurements
	Fair Value March 31, 2018		Fair Value December 31, 2017		Valuation Technique	Unobservable Input	Range
Impaired loans/leases	$	5,564,760	$	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 March 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	$	61,845,988	$	61,845,988	$	75,721,663	$	75,721,663
Federal funds sold	Level 2		14,505,000		14,505,000		30,197,000		30,197,000
Interest-bearing deposits at financial institutions	Level 2		45,051,555		45,051,555		55,765,012		55,765,012
Investment securities:
HTM	Level 2		378,584,337		375,792,683		379,474,205		379,749,804
AFS	See Previous Table		259,644,940		259,644,940		272,907,907		272,907,907
Loans/leases receivable, net	Level 3		5,152,556		5,564,760		8,307,719		8,972,337
Loans/leases receivable, net	Level 2		3,013,217,281		2,948,650,000		2,921,821,953		2,892,963,000
Interest rate caps	Level 2		657,178		657,178		506,700		506,700
Interest rate swaps - assets	Level 2		4,500,318		4,500,318		4,397,238		4,397,238
Deposits:
Nonmaturity deposits	Level 2		2,603,999,039		2,603,999,039		2,670,583,178		2,670,583,178
Time deposits	Level 2		676,002,453		670,297,000		596,071,878		591,772,000
Short-term borrowings	Level 2		16,859,753		16,859,753		13,993,122		13,993,122
FHLB advances	Level 2		216,345,000		216,397,000		192,000,000		192,115,000
Other borrowings	Level 2		64,062,500		64,583,000		66,000,000		66,520,000
Junior subordinated debentures	Level 2		37,534,402		29,318,931		37,486,487		29,253,624
Interest rate swaps - liabilities	Level 2		4,500,318		4,500,318		4,397,238		4,397,238