Note 3 - Aging of the Loan Lease Portfolio (Details) - USD ($)		Jun. 30, 2016	Dec. 31, 2015
Commercial Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Past Due		$ 400,711	$ 1,636,860
Commercial Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Past Due		13,225,353	5,816
Commercial Portfolio Segment [Member]
Current		687,859,076	640,725,241
Nonaccrual Loans/Leases		4,776,046	5,791,975
Loans		706,261,186	648,159,892
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | Owner Occupied Commercial Real Estate Loans [Member]
Past Due		141,571	182,949
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		530,808	614,732
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		1,384,387	219,383
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Commercial Real Estate Loans [Member]
Current		257,503,344	251,612,752
Nonaccrual Loans/Leases		1,043,530	727,463
Loans		258,688,445	252,523,164
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Current		48,759,844	48,890,040
Nonaccrual Loans/Leases		188,981	193,804
Loans		48,948,825	49,083,844
Commercial Real Estate Portfolio Segment [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member]
Current		473,256,279	420,819,874
Nonaccrual Loans/Leases		1,485,865	1,107,768
Loans		476,741,839	422,761,757
Commercial Real Estate Portfolio Segment [Member]
Loans		784,379,109	724,368,765
Finance Leases Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Past Due		1,036,764	1,490,818
Finance Leases Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Past Due		1,230,235	439,314
Finance Leases Portfolio Segment [Member]
Current		165,927,453	170,021,289
Nonaccrual Loans/Leases		1,733,029	1,701,341
Loans	[1],[2]	169,927,481	173,655,605
Accruing Past Due 90 Days or More			2,843
Residential Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Past Due			2,800,589
Residential Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Past Due			200,080
Residential Portfolio Segment [Member]
Current		179,075,229	166,415,118
Nonaccrual Loans/Leases		1,191,215	1,016,743
Loans	[2],[3]	180,482,005	170,432,530
Accruing Past Due 90 Days or More
Consumer Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Past Due		446,971	412,052
Consumer Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Past Due		59,391	14,127
Consumer Portfolio Segment [Member]
Current		72,831,797	73,134,197
Nonaccrual Loans/Leases		318,145	109,117
Loans	[2]	73,658,172	73,669,493
Accruing Past Due 90 Days or More		1,868
Financing Receivables, 30 to 59 Days Past Due [Member]
Past Due		$ 2,556,825	$ 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		$ 16,114,927	$ 878,720
Past due as a percentage of total loan/lease portfolio		0.84%	0.05%
Current		$ 1,885,213,022	$ 1,771,618,511
Nonaccrual Loans/Leases		10,736,811	10,648,211
Loans		1,914,707,953	1,790,286,285
Accruing Past Due 90 Days or More		$ 86,368	$ 2,843
Current as a percentage of total loan/lease portfolio		98.46%	98.96%
Accruing past due 90 days or more as a percentage of total loan/lease portfolio		0.00%	0.00%
Nonaccrual Loans/Leases as a percentage of total loan/lease portfolio		0.56%	0.59%
Loans and leases as a percentage of total loan/lease portfolio		100.00%	100.00%

[1] 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, which is combined with 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 for the three and six months ended June 30, 2016 and 2015.

[2] 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 TDRs.

[3] Includes residential real estate loans held for sale totaling $1,558,500 and $565,850 as of June 30, 2016, and December 31, 2015, respectively.