Note 4 - Loans/Leases Receivable (Details) - Aging of the Loan/Lease Portfolio (USD $)	Dec. 31, 2013		Dec. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 1,430,204,215		$ 1,257,131,874
30-59 Days Past Due	5,430,932		7,387,450
60-89 Days Past Due	2,135,415		1,599,934
Accruing Past Due 90 Days or More	84,174		159,481
Nonacrrual Loans/Loans	17,877,897		17,932,495
Total	1,455,732,633		1,284,211,234
Current as a percentage of total loan/lease portfolio	98.25%		97.89%
30-59 Days Past Due as a percentage of total loan/lease portfolio	0.37%		0.58%
60-89 Days Past Due as a percentage of total loan/lease portfolio	0.15%		0.12%
Accruing Past Due 90 Days or More as a percentage of total loan/lease portfolio	0.01%		0.01%
Nonacrrual Loans/Loans as a percentage of total loan/lease portfolio	1.23%		1.40%
Total as a percentage of total loan/lease portfolio	100.00%		100.00%
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	429,557,699		388,825,307
30-59 Days Past Due	199,949		3,724,506
60-89 Days Past Due	185,500		9,940
Accruing Past Due 90 Days or More			120,000
Nonacrrual Loans/Loans	1,744,981	[1]	1,564,499	[2]
Total	431,688,129		394,244,252
Total as a percentage of total loan/lease portfolio	12.81%		7.36%
Owner-Occupied Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	258,557,660		204,141,070
30-59 Days Past Due	465,418		142,993
60-89 Days Past Due	993,163
Accruing Past Due 90 Days or More	60,286
Nonacrrual Loans/Loans	1,139,385	[1]	627,245	[2]
Total	261,215,912		204,911,308
Total as a percentage of total loan/lease portfolio	5.86%		2.47%
Commercial Construction, Land Development, and Other Land [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	56,301,186		42,180,819
30-59 Days Past Due	358,626
Nonacrrual Loans/Loans	1,185,090	[1]	2,781,562	[2]
Total	57,844,902		44,962,381
Total as a percentage of total loan/lease portfolio	5.79%		14.96%
Other Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	341,743,730		332,644,532
30-59 Days Past Due	476,877		86,986
60-89 Days Past Due	151,017		1,111,856
Nonacrrual Loans/Loans	10,320,491		10,262,176
Total	352,692,115		344,105,550
Finance Leases Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	126,878,515		101,635,084
30-59 Days Past Due	714,464		877,210
60-89 Days Past Due	414,005		174,560
Nonacrrual Loans/Loans	894,458	[1]	998,802	[2]
Total	128,901,442		103,685,656
Total as a percentage of total loan/lease portfolio	4.37%		3.93%
Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	142,353,936		111,993,859
30-59 Days Past Due	3,088,516		2,254,730
60-89 Days Past Due	275,262		283,466
Accruing Past Due 90 Days or More	20,126
Nonacrrual Loans/Loans	1,618,483	[1]	1,049,518	[2]
Total	147,356,323	[3]	115,581,573	[3]
Total as a percentage of total loan/lease portfolio	9.82%		4.79%
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	74,811,489		75,711,203
30-59 Days Past Due	127,082		301,025
60-89 Days Past Due	116,468		20,112
Accruing Past Due 90 Days or More	3,762		39,481
Nonacrrual Loans/Loans	975,009	[1]	648,693	[2]
Total	$ 76,033,810		$ 76,720,514
Total as a percentage of total loan/lease portfolio	6.57%		3.15%

[1] At December 31, 2013, nonaccrual loans/leases included $10,890,785 of troubled debt restructurings, including $77,072 in commercial and industrial loans, $10,077,501 in commercial real estate loans, $446,996 in residential real estate loans, and $289,216 in installment loans.

[2] At December 31, 2012, nonaccrual loans/leases included $5,658,781 of troubled debt restructurings, including $99,804 in commercial and industrial loans, $5,173,589 in commercial real estate loans, $64,722 in residential real estate loans, and $320,666 in installment loans.

[3] Includes residential real estate loans held for sale totaling $1,358,290 and $4,577,233 as of December 31, 2013 and 2012, respectively.