Note 3 - Loans/Leases Receivable (Details) - Aging of the Loan/Lease Portfolio (USD $)	Jun. 30, 2014		Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 1,520,038,538		$ 1,430,204,215
30-59 Days Past Due	3,014,036		5,430,932
60-89 Days Past Due	2,709,475		2,135,415
Accruing Past Due 90 Days or More	103,615		84,174
Nonacrrual Loans/Loans	17,651,534		17,877,897
Total	1,543,517,198		1,455,732,633
Current as a percentage of total loan/lease portfolio	98.48%		98.25%
30-59 Days Past Due as a percentage of total loan/lease portfolio	0.20%		0.37%
60-89 Days Past Due as a percentage of total loan/lease portfolio	0.18%		0.15%
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	1.14%		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	478,425,272		429,557,699
30-59 Days Past Due	162,344		199,949
60-89 Days Past Due	110,714		185,500
Accruing Past Due 90 Days or More	41,950
Nonacrrual Loans/Loans	1,754,041	[1]	1,744,981	[2]
Total	480,494,321		431,688,129
Total as a percentage of total loan/lease portfolio	16.45%		12.81%
Owner-Occupied Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	244,861,764		258,557,660
30-59 Days Past Due	81,356		465,418
60-89 Days Past Due	1,380,715		993,163
Accruing Past Due 90 Days or More	39,852		60,286
Nonacrrual Loans/Loans	1,232,464	[1]	1,139,385	[2]
Total	247,596,151		261,215,912
Total as a percentage of total loan/lease portfolio	6.38%		5.86%
Commercial Construction, Land Development, and Other Land [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	56,324,561		56,301,186
30-59 Days Past Due	1,086,827		358,626
Nonacrrual Loans/Loans	630,701	[1]	1,185,090	[2]
Total	58,042,089		57,844,902
Total as a percentage of total loan/lease portfolio	3.16%		5.79%
Other Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	366,941,393		341,743,730
30-59 Days Past Due	924,340		476,877
60-89 Days Past Due	18,800		151,017
Nonacrrual Loans/Loans	9,852,968		10,320,491
Total	377,737,501		352,692,115
Finance Leases Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	151,796,790		126,878,515
30-59 Days Past Due	599,582		714,464
60-89 Days Past Due	802,650		414,005
Accruing Past Due 90 Days or More	13,167
Nonacrrual Loans/Loans	1,791,829	[1]	894,458	[2]
Total	155,004,018		128,901,442
Total as a percentage of total loan/lease portfolio	9.05%		4.37%
Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	151,334,965		142,353,936
30-59 Days Past Due	65,549		3,088,516
60-89 Days Past Due	347,400		275,262
Accruing Past Due 90 Days or More			20,126
Nonacrrual Loans/Loans	1,451,805	[1]	1,618,483	[2]
Total	153,199,719	[3]	147,356,323	[3]
Total as a percentage of total loan/lease portfolio	9.00%		9.82%
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	70,353,793		74,811,489
30-59 Days Past Due	94,038		127,082
60-89 Days Past Due	49,196		116,468
Accruing Past Due 90 Days or More	8,646		3,762
Nonacrrual Loans/Loans	937,726	[1]	975,009	[2]
Total	$ 71,443,399		$ 76,033,810
Total as a percentage of total loan/lease portfolio	6.54%		6.57%

[1] Nonaccrual loans/leases includes $9,778,112 of troubled debt restructurings, including $83,922 in commercial and industrial loans, $8,897,061 in commercial real estate loans, $156,800 in direct financing leases, $443,224 in residential real estate loans, and $197,105 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 $1,302,175 and $1,358,290 as of June 30, 2014, and December 31, 2013, respectively.