Note 3 - Loans Leases Receivable - Aging of the Loan Lease Portfolio (Details) - USD ($)		Sep. 30, 2016	Dec. 31, 2015
Commercial Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Past Due		$ 358,503	$ 1,636,860
Commercial Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Past Due		232,297	5,816
Commercial Portfolio Segment [Member]
Current		796,943,072	640,725,241
Nonaccrual Loans/Leases		6,507,205	5,791,975
Loans		804,307,562	648,159,892
Accruing Past Due 90 Days or More		266,485
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] | Other Non-owner Occupied Commercial Real Estate Loans [Member]
Past Due		4,617,055	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			219,383
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Commercial Real Estate Loans [Member]
Current		316,299,798	251,612,752
Nonaccrual Loans/Leases		1,599,213	727,463
Loans		317,899,011	252,523,164
Accruing Past Due 90 Days or More
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Current		160,034,828	48,890,040
Nonaccrual Loans/Leases		492,266	193,804
Loans		160,527,094	49,083,844
Accruing Past Due 90 Days or More
Commercial Real Estate Portfolio Segment [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member]
Current		585,545,037	420,819,874
Nonaccrual Loans/Leases		1,716,564	1,107,768
Loans		591,878,656	422,761,757
Accruing Past Due 90 Days or More
Commercial Real Estate Portfolio Segment [Member]
Loans		1,070,304,761	724,368,765
Finance Leases Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Past Due		1,180,356	1,490,818
Finance Leases Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Past Due		998,896	439,314
Finance Leases Portfolio Segment [Member]
Current		162,556,659	170,021,289
Nonaccrual Loans/Leases		2,188,166	1,701,341
Loans	[1],[2]	166,924,077	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		122,744	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		227,061,212	166,415,118
Nonaccrual Loans/Leases		1,677,217	1,016,743
Loans	[2],[3]	229,080,600	170,432,530
Accruing Past Due 90 Days or More		104,789
Consumer Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Past Due		89,104	412,052
Consumer Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Past Due		41,332	14,127
Consumer Portfolio Segment [Member]
Current		81,576,782	73,134,197
Nonaccrual Loans/Leases		190,022	109,117
Loans	[2]	81,917,732	73,669,493
Accruing Past Due 90 Days or More		20,492
Financing Receivables, 30 to 59 Days Past Due [Member]
Past Due		$ 6,367,762	$ 7,138,000
Past due as a percentage of total loan/lease portfolio		0.27%	0.40%
Financing Receivables, 60 to 89 Days Past Due [Member]
Past Due		$ 1,387,163	$ 878,720
Past due as a percentage of total loan/lease portfolio		0.06%	0.05%
Current		$ 2,330,017,388	$ 1,771,618,511
Nonaccrual Loans/Leases		14,370,653	10,648,211
Loans		2,352,534,732	1,790,286,285
Accruing Past Due 90 Days or More		$ 391,766	$ 2,843
Current as a percentage of total loan/lease portfolio		99.05%	98.96%
Accruing past due 90 days or more as a percentage of total loan/lease portfolio		0.02%	0.00%
Nonaccrual Loans/Leases as a percentage of total loan/lease portfolio		0.61%	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 nine months ended September 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 $1,377,875 and $565,850 as of September 30, 2016, and December 31, 2015, respectively.