Note 4 - Loans Leases Receivable - Loans Leases Nonperforming Loans Leases (Details) - USD ($)		Dec. 31, 2016	Dec. 31, 2015
Accruing Past Due 90 Days or More		$ 966,814	$ 2,843
Nonaccrual Loans/Leases		13,919,066	10,648,211	[1]
Accruing TDRs		8,647,007	2,587,413
Loans		$ 2,397,414,282	$ 1,790,286,285
Percentage of Total NPLs		100.00%	100.00%
Nonperforming Financial Instruments [Member]
Accruing Past Due 90 Days or More		$ 966,814
Nonaccrual Loans/Leases	[2]	13,919,066
Accruing TDRs		6,346,528	$ 1,053,756
Loans		$ 21,232,408	$ 11,704,810
Percentage of Total NPLs		100.00%	100.00%
Commercial Portfolio Segment [Member]
Accruing Past Due 90 Days or More		$ 346,234
Nonaccrual Loans/Leases		4,187,786	5,791,975	[1]
Loans		827,637,263	648,159,892
Commercial Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Accruing Past Due 90 Days or More		346,234
Nonaccrual Loans/Leases	[2]	4,187,786
Accruing TDRs		4,733,997	173,087
Loans		$ 9,268,017	$ 5,965,062
Percentage of Total NPLs		43.65%	50.96%
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]
Accruing Past Due 90 Days or More
Nonaccrual Loans/Leases		332,148	727,463	[1]
Loans		332,387,621	252,523,164
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Accruing Past Due 90 Days or More
Nonaccrual Loans/Leases		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]
Accruing Past Due 90 Days or More
Nonaccrual Loans/Leases		1,436,149	1,107,768	[1]
Loans		595,921,748	422,761,757
Commercial Real Estate Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Owner Occupied Commercial Real Estate Loans [Member]
Accruing Past Due 90 Days or More
Nonaccrual Loans/Leases	[2]	332,148
Accruing TDRs
Loans		$ 332,148	$ 727,463
Percentage of Total NPLs		1.56%	6.22%
Commercial Real Estate Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Construction Loans [Member]
Accruing Past Due 90 Days or More
Nonaccrual Loans/Leases	[2]	4,353,819
Accruing TDRs
Loans		$ 4,353,819	$ 193,804
Percentage of Total NPLs		20.51%	1.66%
Commercial Real Estate Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member]
Accruing Past Due 90 Days or More
Nonaccrual Loans/Leases	[2]	1,436,149
Accruing TDRs
Loans		$ 1,436,149	$ 1,107,768
Percentage of Total NPLs		6.77%	9.46%
Finance Leases Portfolio Segment [Member]
Accruing Past Due 90 Days or More		$ 215,225	$ 2,843
Nonaccrual Loans/Leases		2,446,181	1,701,341	[1]
Loans	[3],[4]	165,419,360	173,655,605
Finance Leases Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Accruing Past Due 90 Days or More		215,225
Nonaccrual Loans/Leases	[2]	2,446,181
Accruing TDRs		1,008,244
Loans	[4]	$ 3,669,650	$ 1,704,184
Percentage of Total NPLs		17.28%	14.56%
Residential Portfolio Segment [Member]
Accruing Past Due 90 Days or More		$ 294,854
Nonaccrual Loans/Leases		1,075,639	1,016,743	[1]
Loans	[4],[5]	229,233,104	170,432,530
Residential Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Accruing Past Due 90 Days or More		294,854
Nonaccrual Loans/Leases	[2]	1,075,639
Accruing TDRs		585,541	402,044
Loans	[4]	$ 1,956,034	$ 1,418,787
Percentage of Total NPLs		9.21%	12.12%
Consumer Portfolio Segment [Member]
Accruing Past Due 90 Days or More		$ 110,501
Nonaccrual Loans/Leases		87,344	109,117	[1]
Loans	[4]	81,665,695	73,669,493
Consumer Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Accruing Past Due 90 Days or More		110,501
Nonaccrual Loans/Leases	[2]	87,344
Accruing TDRs		18,746	478,625
Loans	[4]	$ 216,591	$ 587,742
Percentage of Total NPLs		1.02%	5.02%

[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] At December 31, 2016, nonaccrual loans/leases included $2,300,479 of TDRs, including $48,501 in C&I loans, $1,380,047 in CRE loans, $816,149 in direct financing leases, $43,579 in residential real estate loans, and $12,203 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.

[4] 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.

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