Note 3 - Loans/Leases Receivable (Details) - Aging of the Loan/Lease Portfolio (USD $)	Mar. 31, 2014		Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 1,462,397,460		$ 1,430,204,215
30-59 Days Past Due	5,762,575		5,430,932
60-89 Days Past Due	1,513,479		2,135,415
Accruing Past Due 90 Days or More	5,575		84,174
Nonacrrual Loans/Loans	17,653,407		17,877,897
Total	1,487,332,496		1,455,732,633
Current as a percentage of total loan/lease portfolio	98.32%		98.25%
30-59 Days Past Due as a percentage of total loan/lease portfolio	0.39%		0.37%
60-89 Days Past Due as a percentage of total loan/lease portfolio	0.10%		0.15%
Accruing Past Due 90 Days or More as a percentage of total loan/lease portfolio	0.00%		0.01%
Nonacrrual Loans/Loans as a percentage of total loan/lease portfolio	1.19%		1.23%
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	440,037,552		429,557,699
30-59 Days Past Due	679,842		199,949
60-89 Days Past Due	82,110		185,500
Accruing Past Due 90 Days or More	4,838
Nonacrrual Loans/Loans	1,546,133	[1]	1,744,981	[2]
Total	442,350,475		431,688,129
Total as a percentage of total loan/lease portfolio	9.29%		12.81%
Owner-Occupied Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	268,087,219		258,557,660
30-59 Days Past Due	217,205		465,418
60-89 Days Past Due	101,723		993,163
Accruing Past Due 90 Days or More			60,286
Nonacrrual Loans/Loans	1,077,377	[1]	1,139,385	[2]
Total	269,483,524		261,215,912
Total as a percentage of total loan/lease portfolio	5.78%		5.86%
Commercial Construction, Land Development, and Other Land [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	53,069,537		56,301,186
30-59 Days Past Due	943,219		358,626
Nonacrrual Loans/Loans	1,181,269	[1]	1,185,090	[2]
Total	55,194,025		57,844,902
Total as a percentage of total loan/lease portfolio	6.34%		5.79%
Other Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	342,951,740		341,743,730
30-59 Days Past Due	246,141		476,877
60-89 Days Past Due	1,104,646		151,017
Nonacrrual Loans/Loans	10,248,129		10,320,491
Total	354,550,656		352,692,115
Finance Leases Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	136,956,753		126,878,515
30-59 Days Past Due	1,684,403		714,464
60-89 Days Past Due	120,969		414,005
Accruing Past Due 90 Days or More	735
Nonacrrual Loans/Loans	1,231,199	[1]	894,458	[2]
Total	139,994,059		128,901,442
Total as a percentage of total loan/lease portfolio	7.09%		4.37%
Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	145,891,697		142,353,936
30-59 Days Past Due	1,562,455		3,088,516
60-89 Days Past Due			275,262
Accruing Past Due 90 Days or More			20,126
Nonacrrual Loans/Loans	1,496,065	[1]	1,618,483	[2]
Total	148,950,217	[3]	147,356,323	[3]
Total as a percentage of total loan/lease portfolio	9.89%		9.82%
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	75,402,962		74,811,489
30-59 Days Past Due	429,310		127,082
60-89 Days Past Due	104,031		116,468
Accruing Past Due 90 Days or More	2		3,762
Nonacrrual Loans/Loans	873,235	[1]	975,009	[2]
Total	$ 76,809,540		$ 76,033,810
Total as a percentage of total loan/lease portfolio	6.60%		6.57%

[1] Nonaccrual loans/leases includes $10,666,735 of troubled debt restructurings, including $75,371 in commercial and industrial loans, $9,862,220 in commercial real estate loans, $70,144 in direct financing leases, $449,525 in residential real estate loans, and $209,475 in installment loans.

[2] Nonaccrual loans/leases includes $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.

[3] Includes residential real estate loans held for sale totaling $291,600 and $1,358,290 as of March 31, 2014, and December 31, 2013, respectively.