Note 4 - Loans Leases Receivable - Aging of the Loan Lease Portfolio (Details) - USD ($)		Dec. 31, 2016	Dec. 31, 2015
Current		$ 2,378,270,983	$ 1,771,618,511
Accruing Past Due 90 Days or More		966,814	2,843
Financing Receivable, Recorded Investment, Nonaccrual Status		13,919,066	10,648,211	[1]
Loans		$ 2,397,414,282	$ 1,790,286,285
Current as a percentage of total loan/lease portfolio		99.20%	98.96%
Accruing past due 90 days or more as a percentage of total loan/lease portfolio		0.04%	0.00%
Nonaccrual Loans/Leases as a percentage of total loan/lease portfolio		0.58%	0.59%
Loans and leases as a percentage of total loan/lease portfolio		100.00%	100.00%
Financing Receivables, 30 to 59 Days Past Due [Member]
Past Due		$ 3,000,574	$ 7,138,000
Past due as a percentage of total loan/lease portfolio		0.13%	0.40%
Financing Receivables, 60 to 89 Days Past Due [Member]
Past Due		$ 1,256,845	$ 878,720
Past due as a percentage of total loan/lease portfolio		0.05%	0.05%
Commercial Portfolio Segment [Member]
Current		$ 821,637,507	$ 640,725,241
Accruing Past Due 90 Days or More		346,234
Financing Receivable, Recorded Investment, Nonaccrual Status		4,187,786	5,791,975	[1]
Loans		827,637,263	648,159,892
Commercial Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Past Due		1,455,185	1,636,860
Commercial Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Past Due		10,551	5,816
Commercial Real Estate Portfolio Segment [Member]
Loans		1,093,458,860	724,368,765
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Commercial Real Estate Loans [Member]
Current		331,812,571	251,612,752
Accruing Past Due 90 Days or More
Financing Receivable, Recorded Investment, Nonaccrual Status		332,148	727,463	[1]
Loans		332,387,621	252,523,164
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Current		160,760,034	48,890,040
Accruing Past Due 90 Days or More
Financing Receivable, Recorded Investment, Nonaccrual Status		4,353,819	193,804	[1]
Loans		165,149,491	49,083,844
Commercial Real Estate Portfolio Segment [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member]
Current		594,384,926	420,819,874
Accruing Past Due 90 Days or More
Financing Receivable, Recorded Investment, Nonaccrual Status		1,436,149	1,107,768	[1]
Loans		595,921,748	422,761,757
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | Owner Occupied Commercial Real Estate Loans [Member]
Past Due			182,949
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | Construction Loans [Member]
Past Due		35,638
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member]
Past Due		100,673	614,732
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | Owner Occupied Commercial Real Estate Loans [Member]
Past Due		242,902
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | Construction Loans [Member]
Past Due
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member]
Past Due			219,383
Finance Leases Portfolio Segment [Member]
Current		161,452,627	170,021,289
Accruing Past Due 90 Days or More		215,225	2,843
Financing Receivable, Recorded Investment, Nonaccrual Status		2,446,181	1,701,341	[1]
Loans	[2],[3]	165,419,360	173,655,605
Finance Leases Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Past Due		730,627	1,490,818
Finance Leases Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Past Due		574,700	439,314
Residential Portfolio Segment [Member]
Current		227,023,552	166,415,118
Accruing Past Due 90 Days or More		294,854
Financing Receivable, Recorded Investment, Nonaccrual Status		1,075,639	1,016,743	[1]
Loans	[3],[4]	229,233,104	170,432,530
Residential Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Past Due		473,478	2,800,589
Residential Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Past Due		365,581	200,080
Consumer Portfolio Segment [Member]
Current		81,199,766	73,134,197
Accruing Past Due 90 Days or More		110,501
Financing Receivable, Recorded Investment, Nonaccrual Status		87,344	109,117	[1]
Loans	[3]	81,665,695	73,669,493
Consumer Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Past Due		204,973	412,052
Consumer Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Past Due		$ 63,111	$ 14,127

[1] At December 31, 2015, nonaccrual loans/leases included $1,533,657 of TDRs, including $1,164,423 in C&I loans, $193,804 in CRE loans, $42,098 in direct financing leases, $119,305 in residential real estate loans, and $14,027 in installment loans.

[2] 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.

[3] Performing = loans/leases accruing and less than 90 days past due. Nonperforming = loans/leases on nonaccrual, accruing loans/leases that are greater than or equal to 90 days past due, and accruing troubled debt restructurings.

[4] Includes residential real estate loans held for sale totaling $1,135,500 and $565,850 as of December 31, 2016 and 2015, respectively.