Note 4 - Loans/Leases Receivable (Details) - Aging of the Loan/Lease Portfolio (USD $)	Dec. 31, 2014		Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 1,592,673,090		$ 1,430,204,215
30-59 Days Past Due	8,016,535		5,430,932
60-89 Days Past Due	3,968,136		2,135,415
Accruing Past Due 90 Days or More	93,411		84,174
Nonacrrual Loans/Loans	18,587,778		17,877,897
Total	1,623,338,950		1,455,732,633
Current as a percentage of total loan/lease portfolio	98.11%		98.25%
30-59 Days Past Due as a percentage of total loan/lease portfolio	0.49%		0.37%
60-89 Days Past Due as a percentage of total loan/lease portfolio	0.24%		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	1.15%		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	515,616,752		429,557,699
30-59 Days Past Due	323,145		199,949
60-89 Days Past Due			185,500
Accruing Past Due 90 Days or More	822
Nonacrrual Loans/Loans	7,986,421	[1]	1,744,981	[2]
Total	523,927,140		431,688,129
Total as a percentage of total loan/lease portfolio	40.91%		12.81%
Owner-Occupied Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	259,166,743		258,557,660
30-59 Days Past Due	239,771		465,418
60-89 Days Past Due			993,163
Accruing Past Due 90 Days or More			60,286
Nonacrrual Loans/Loans	662,566	[1]	1,139,385	[2]
Total	260,069,080		261,215,912
Total as a percentage of total loan/lease portfolio	3.30%		5.86%
Commercial Construction, Land Development, and Other Land [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	67,021,157		56,301,186
30-59 Days Past Due	729,983		358,626
60-89 Days Past Due	111,837
Nonacrrual Loans/Loans	256,012	[1]	1,185,090	[2]
Total	68,118,989		57,844,902
Total as a percentage of total loan/lease portfolio	1.27%		5.79%
Other Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	360,970,551		341,743,730
30-59 Days Past Due	3,448,902		476,877
60-89 Days Past Due	2,840,862		151,017
Accruing Past Due 90 Days or More	60,000
Nonacrrual Loans/Loans	6,632,038		10,320,491
Total	373,952,353		352,692,115
Finance Leases Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	164,059,914		126,878,515
30-59 Days Past Due	573,575		714,464
60-89 Days Past Due	293,212		414,005
Nonacrrual Loans/Loans	1,105,715	[1]	894,458	[2]
Total	166,032,416	[3]	128,901,442	[3]
Total as a percentage of total loan/lease portfolio	6.66%		4.37%
Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	154,303,644		142,353,936
30-59 Days Past Due	2,528,287		3,088,516
60-89 Days Past Due	475,343		275,262
Accruing Past Due 90 Days or More	25,673		20,126
Nonacrrual Loans/Loans	1,299,545	[1]	1,618,483	[2]
Total	158,632,492	[4]	147,356,323	[4]
Total as a percentage of total loan/lease portfolio	9.02%		9.82%
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	71,534,329		74,811,489
30-59 Days Past Due	172,872		127,082
60-89 Days Past Due	246,882		116,468
Accruing Past Due 90 Days or More	6,916		3,762
Nonacrrual Loans/Loans	645,481	[1]	975,009	[2]
Total	$ 72,606,480		$ 76,033,810
Total as a percentage of total loan/lease portfolio	5.55%		6.57%

[1] At December 31, 2014, nonaccrual loans/leases included $5,013,041 of troubled debt restructurings, including $1,227,537 in commercial and industrial loans, $3,214,468 in commercial real estate loans, $61,144 in direct financing leases, $506,283 in residential real estate loans, and $3,609 in installment loans.

[2] 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.

[3] Management performs an evaluation of the estimated unguaranteed residual values of leased assets on an annual basis, at a minimum. The evaluation consists of discussions with reputable and current vendors and management's expertise and understanding of the current states of particular industries to determine informal valuations of the equipment. As necessary and where available, management will utilize valuations by independent appraisers. The large majority of leases with residual values contain a lease options rider which requires the lessee to pay the residual value directly, finance the payment of the residual value, or extend the lease term to pay the residual value. In these cases, the residual value is protected and the risk of loss is minimal. There were no losses related to residual values during the years ended December 31, 2014, 2013, and 2012. At December 31, 2014, the Company had 27 leases remaining with residual values totaling $1,488,342 that were not protected with a lease end options rider. At December 31, 2013, the Company had 33 leases remaining with residual values totaling $1,694,499 that were not protected with a lease end options rider. Management has performed specific evaluations of these residual values and determined that the valuations are appropriate.

[4] Includes residential real estate loans held for sale totaling $553,000 and $1,358,290 as of December 31, 2014 and 2013, respectively.