Note 21 - Fair Value (Tables)

12 Months Ended

Dec. 31, 2016

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)
December 31, 2016:
Securities available for sale:
U.S. govt. sponsored agency securities	$	46,083,607	$	-	$	46,083,607	$	-
Residential mortgage-backed securities		147,702,127		-		147,702,127		-
Municipal securities		52,604,426		-		52,604,426		-
Other securities		4,722,979		1,361		4,721,618		-
Interest rate caps		576,527		-		576,527		-
Interest rate swaps - assets		2,338,281		-		2,338,281
Total assets measured at fair value	$	254,027,947	$	1,361	$	254,026,586	$	-
Interest rate swaps - liabilities	$	2,338,281	$	-	$	2,338,281	$	-
Total liabilities measured at fair value	$	2,338,281	$	-	$	2,338,281	$	-
December 31, 2015:
Securities available for sale:
U.S. govt. sponsored agency securities	$	213,537,379	$	-	$	213,537,379	$	-
Residential mortgage-backed securities		80,670,135		-		80,670,135		-
Municipal securities		27,578,588		-		27,578,588		-
Other securities		1,648,880		411		1,648,469		-
Interest rate caps		856,024		-		856,024		-
Interest rate swaps - assets		3,044,525		-		3,044,525
Total assets measured at fair value	$	327,335,531	$	411	$	327,335,120	$	-
Interest rate swaps - liabilities	$	3,044,525	$	-	$	3,044,525	$	-
Total liabilities measured at fair value	$	3,044,525	$	-	$	3,044,525	$	-

			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, 2016:
Impaired loans/leases	$	12,823,121	$	-	$	-	$	12,823,121
Other real estate owned		5,964,952		-		-		5,964,952
	$	18,788,073	$	-	$	-	$	18,788,073
December 31, 2015:
Impaired loans/leases	$	4,545,966	$	-	$	-	$	4,545,966
Other real estate owned		7,722,711		-		-		7,722,711
	$	12,268,677	$	-	$	-	$	12,268,677

Fair Value Inputs, Assets, Quantitative Information [Table Text Block]

	Quantitative Information about Level Fair Value Measurements
	December 31, 2016 Fair Value		December 31, 2015 Fair Value		Valuation Technique	Unobservable Input	Range
Impaired loans/leases	$	12,823,121	$	4,545,966	Appraisal of collateral	Appraisal adjustments	-10.00%	to	-50.00%
Other real estate owned		5,964,952		7,722,711	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, 2016				As of December 31, 2015
	Hierarchy	Carrying		Estimated		Carrying		Estimated
	Level	Value		Fair Value		Value		Fair Value
Cash and due from banks	Level 1	$	70,569,993	$	70,569,993	$	41,742,321	$	41,742,321
Federal funds sold	Level 2		22,257,000		22,257,000		19,850,000		19,850,000
Interest-bearing deposits at financial institutions	Level 2		63,948,925		63,948,925		36,313,965		36,313,965
Investment securities:
HTM	Level 2		322,909,056		320,414,899		253,674,159		255,691,285
AFS	See Previous Table		251,113,139		251,113,139		323,434,982		323,434,982
Loans/leases receivable, net	Level 3		11,873,260		12,823,121		4,209,228		4,545,966
Loans/leases receivable, net	Level 2		2,362,856,277		2,344,462,740		1,767,672,541		1,764,178,772
Interest rate caps	Level 2		576,527		576,527		856,024		856,024
Interest rate swaps - assets	Level 2		2,338,281		2,338,281		3,044,525		3,044,525
Deposits:
Nonmaturity deposits	Level 2		2,188,683,349		2,188,683,349		1,516,599,081		1,516,599,081
Time deposits	Level 2		480,577,924		479,605,000		364,067,103		364,192,000
Short-term borrowings	Level 2		39,971,387		39,971,387		144,662,716		144,662,716
FHLB advances	Level 2		137,500,000		138,338,000		151,000,000		153,143,000
Other borrowings	Level 2		80,000,000		81,282,000		110,000,000		116,061,000
Junior subordinated debentures	Level 2		33,480,202		24,881,494		38,499,052		27,642,093
Interest rate swaps - liabilities	Level 2		2,338,281		2,338,281		3,044,525		3,044,525