Note 3 - Loans/Leases Receivable (Details) - Allowance for Estimated Losses on Loans/Leases (USD $)	3 Months Ended			6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013	Jun. 30, 2014		Jun. 30, 2013	Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning	$ 22,653,270		$ 20,769,462	$ 21,448,048		$ 19,925,204
Provisions charged to expense	1,001,879		1,520,137	2,096,041		2,577,919
Loans/leases charged off	(675,977)		(1,332,907)	(755,298)		(1,635,674)
Recoveries on loans/leases previously charged off	87,852		199,687	278,233		288,930
Balance, ending	23,067,024		21,156,379	23,067,024		21,156,379
Allowance for loans/leases individually evaluated for impairment	4,658,545			4,658,545			5,008,822
Allowance for loans/leases collectively evaluated for impairment	18,408,479			18,408,479			16,439,226
Allowance for loans/leases collectively and individually evaluated for impairment	23,067,024		21,156,379	23,067,024		21,156,379
Loans/leases individually evaluated for impairment	18,250,952			18,250,952			19,080,420
Loans/leases collectively evaluated for impairment	1,525,266,246			1,525,266,246			1,436,652,213
Loans/Leases individually and collectively evaluated for impairment	1,543,517,198			1,543,517,198			1,455,732,633
Allowance as a percentage of loans/leases individually evaluated for impairment	25.52%			25.52%			26.25%
Allowance as a percentage of loans/leases collectively evaluated for impairment	1.21%			1.21%			1.14%
Total allowancе as a pеrcеntagе of total loans/lеaеss	1.49%			1.49%			1.47%
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning	6,647,658		4,466,264	5,648,774		4,531,545
Provisions charged to expense	101,718		348,298	1,078,508		260,491
Loans/leases charged off	(222,057)		(38,685)	(226,080)		(38,900)
Recoveries on loans/leases previously charged off	22,059		14,951	48,176		37,692
Balance, ending	6,549,378		4,790,828	6,549,378		4,790,828
Allowance for loans/leases individually evaluated for impairment	848,593			848,593			927,453
Allowance for loans/leases collectively evaluated for impairment	5,700,785			5,700,785			4,721,321
Allowance for loans/leases collectively and individually evaluated for impairment	6,549,378		4,790,828	6,549,378		4,790,828
Loans/leases individually evaluated for impairment	2,104,768			2,104,768			1,761,850
Loans/leases collectively evaluated for impairment	478,389,553			478,389,553			429,926,279
Loans/Leases individually and collectively evaluated for impairment	480,494,321			480,494,321			431,688,129
Allowance as a percentage of loans/leases individually evaluated for impairment	40.32%			40.32%			52.64%
Allowance as a percentage of loans/leases collectively evaluated for impairment	1.19%			1.19%			1.10%
Total allowancе as a pеrcеntagе of total loans/lеaеss	1.36%			1.36%			1.31%
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning	10,587,657		12,188,953	10,705,434		11,069,502
Provisions charged to expense	(33,506)		672,077	(263,491)		1,786,371
Loans/leases charged off	(311,453)		(820,725)	(315,551)		(820,725)
Recoveries on loans/leases previously charged off	34,994		150,192	151,300		155,349
Balance, ending	10,277,692		12,190,497	10,277,692		12,190,497
Allowance for loans/leases individually evaluated for impairment	2,567,526			2,567,526			3,174,704
Allowance for loans/leases collectively evaluated for impairment	7,710,166			7,710,166			7,530,730
Allowance for loans/leases collectively and individually evaluated for impairment	10,277,692		12,190,497	10,277,692		12,190,497
Loans/leases individually evaluated for impairment	11,264,502			11,264,502			12,956,915
Loans/leases collectively evaluated for impairment	672,111,239			672,111,239			658,796,014
Loans/Leases individually and collectively evaluated for impairment	683,375,741			683,375,741			671,752,929
Allowance as a percentage of loans/leases individually evaluated for impairment	22.79%			22.79%			24.50%
Allowance as a percentage of loans/leases collectively evaluated for impairment	1.15%			1.15%			1.14%
Total allowancе as a pеrcеntagе of total loans/lеaеss	1.50%			1.50%			1.59%
Finance Leases Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning	2,820,239		2,296,523	2,517,217		1,990,395
Provisions charged to expense	566,374		340,137	919,021		718,760
Loans/leases charged off	(78,755)		(449,622)	(144,488)		(522,671)
Recoveries on loans/leases previously charged off	11,273		567	27,381		1,121
Balance, ending	3,319,131		2,187,605	3,319,131		2,187,605
Allowance for loans/leases individually evaluated for impairment	534,043			534,043			192,847
Allowance for loans/leases collectively evaluated for impairment	2,785,088			2,785,088			2,324,370
Allowance for loans/leases collectively and individually evaluated for impairment	3,319,131		2,187,605	3,319,131		2,187,605
Loans/leases individually evaluated for impairment	1,791,828			1,791,828			894,458
Loans/leases collectively evaluated for impairment	153,212,190			153,212,190			128,006,984
Loans/Leases individually and collectively evaluated for impairment	155,004,018			155,004,018			128,901,442
Allowance as a percentage of loans/leases individually evaluated for impairment	29.80%			29.80%			21.56%
Allowance as a percentage of loans/leases collectively evaluated for impairment	1.82%			1.82%			1.82%
Total allowancе as a pеrcеntagе of total loans/lеaеss	2.14%			2.14%			1.95%
Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning	1,388,885		966,336	1,395,849		1,070,328
Provisions charged to expense	101,030		195,774	96,675		204,673
Loans/leases charged off	(50,730)			(53,442)		(112,891)
Recoveries on loans/leases previously charged off			3,231	103		3,231
Balance, ending	1,439,185		1,165,341	1,439,185		1,165,341
Allowance for loans/leases individually evaluated for impairment	237,358			237,358			246,266
Allowance for loans/leases collectively evaluated for impairment	1,201,827			1,201,827			1,149,583
Allowance for loans/leases collectively and individually evaluated for impairment	1,439,185		1,165,341	1,439,185		1,165,341
Loans/leases individually evaluated for impairment	1,795,128			1,795,128			2,116,747
Loans/leases collectively evaluated for impairment	151,404,591			151,404,591			145,239,576
Loans/Leases individually and collectively evaluated for impairment	153,199,719	[1]		153,199,719	[1]		147,356,323	[1]
Allowance as a percentage of loans/leases individually evaluated for impairment	13.22%			13.22%			11.63%
Allowance as a percentage of loans/leases collectively evaluated for impairment	0.79%			0.79%			0.79%
Total allowancе as a pеrcеntagе of total loans/lеaеss	0.94%			0.94%			0.95%
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning	1,208,831		851,386	1,180,774		1,263,434
Provisions charged to expense	266,263		(36,149)	265,328		(392,376)
Loans/leases charged off	(12,982)		(23,875)	(15,737)		(140,487)
Recoveries on loans/leases previously charged off	19,526		30,746	51,273		91,537
Balance, ending	1,481,638		822,108	1,481,638		822,108
Allowance for loans/leases individually evaluated for impairment	471,025			471,025			467,552
Allowance for loans/leases collectively evaluated for impairment	1,010,613			1,010,613			713,222
Allowance for loans/leases collectively and individually evaluated for impairment	1,481,638		822,108	1,481,638		822,108
Loans/leases individually evaluated for impairment	1,294,726			1,294,726			1,350,450
Loans/leases collectively evaluated for impairment	70,148,673			70,148,673			74,683,360
Loans/Leases individually and collectively evaluated for impairment	$ 71,443,399			$ 71,443,399			$ 76,033,810
Allowance as a percentage of loans/leases individually evaluated for impairment	36.38%			36.38%			34.62%
Allowance as a percentage of loans/leases collectively evaluated for impairment	1.44%			1.44%			0.95%
Total allowancе as a pеrcеntagе of total loans/lеaеss	2.07%			2.07%			1.55%

[1] Includes residential real estate loans held for sale totaling $1,302,175 and $1,358,290 as of June 30, 2014, and December 31, 2013, respectively.