Note 3 - Loans/Leases Receivable (Details) - Nonperforming Loans/Leases - USD ($)		Jun. 30, 2015		Dec. 31, 2014
Note 3 - Loans/Leases Receivable (Details) - Nonperforming Loans/Leases [Line Items]
Accruing past due 90 days or more		$ 45,483		$ 93,411
Nonaccrual loans/leases		13,542,370		18,587,778
Troubled debt restructurings - accruing		5,189,223		6,434,259
Total nonperforming loans/leases		$ 1,708,179,990		$ 1,623,338,950
Percentage of total nonperforming loans/leases		100.00%		100.00%
Nonperforming Financial Instruments [Member]
Note 3 - Loans/Leases Receivable (Details) - Nonperforming Loans/Leases [Line Items]
Accruing past due 90 days or more		$ 45,483		$ 93,411
Nonaccrual loans/leases		13,542,370	[1]	18,587,778	[2]
Troubled debt restructurings - accruing		1,266,065		1,421,218
Total nonperforming loans/leases		14,853,918		20,102,407
Commercial Portfolio Segment [Member]
Note 3 - Loans/Leases Receivable (Details) - Nonperforming Loans/Leases [Line Items]
Accruing past due 90 days or more		15,775		822
Nonaccrual loans/leases		5,675,753		7,986,421
Total nonperforming loans/leases		$ 606,825,793		$ 523,927,140
Percentage of total nonperforming loans/leases		39.49%		40.91%
Commercial Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Note 3 - Loans/Leases Receivable (Details) - Nonperforming Loans/Leases [Line Items]
Accruing past due 90 days or more		$ 15,775		$ 822
Nonaccrual loans/leases		5,675,753	[1]	7,986,421	[2]
Troubled debt restructurings - accruing		175,024		235,926
Total nonperforming loans/leases		5,866,552		8,223,169
Commercial Real Estate Portfolio Segment [Member]
Note 3 - Loans/Leases Receivable (Details) - Nonperforming Loans/Leases [Line Items]
Total nonperforming loans/leases		696,122,379		702,140,422
Commercial Real Estate Portfolio Segment [Member] | Owner-occupied Commercial Real Estate Loans [Member]
Note 3 - Loans/Leases Receivable (Details) - Nonperforming Loans/Leases [Line Items]
Nonaccrual loans/leases		449,525		662,566
Total nonperforming loans/leases		$ 256,919,047		$ 260,069,080
Percentage of total nonperforming loans/leases		3.03%		3.30%
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Note 3 - Loans/Leases Receivable (Details) - Nonperforming Loans/Leases [Line Items]
Nonaccrual loans/leases		$ 313,258		$ 256,012
Total nonperforming loans/leases		$ 44,706,637		$ 68,118,989
Percentage of total nonperforming loans/leases		2.11%		1.27%
Commercial Real Estate Portfolio Segment [Member] | Other Non Owner-occupied Commercial Real Estate Loans [Member]
Note 3 - Loans/Leases Receivable (Details) - Nonperforming Loans/Leases [Line Items]
Accruing past due 90 days or more				$ 60,000
Nonaccrual loans/leases		$ 3,979,748		6,632,038
Total nonperforming loans/leases		$ 394,496,695		$ 373,952,353
Percentage of total nonperforming loans/leases		26.79%		33.29%
Commercial Real Estate Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Owner-occupied Commercial Real Estate Loans [Member]
Note 3 - Loans/Leases Receivable (Details) - Nonperforming Loans/Leases [Line Items]
Nonaccrual loans/leases		$ 449,525	[1]	$ 662,566	[2]
Total nonperforming loans/leases		449,525		662,566
Commercial Real Estate Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Construction Loans [Member]
Note 3 - Loans/Leases Receivable (Details) - Nonperforming Loans/Leases [Line Items]
Nonaccrual loans/leases		313,258	[1]	256,012	[2]
Total nonperforming loans/leases		313,258		256,012
Commercial Real Estate Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Other Non Owner-occupied Commercial Real Estate Loans [Member]
Note 3 - Loans/Leases Receivable (Details) - Nonperforming Loans/Leases [Line Items]
Accruing past due 90 days or more				60,000
Nonaccrual loans/leases		3,979,748	[1]	6,632,038	[2]
Total nonperforming loans/leases		3,979,748		6,692,038
Finance Leases Portfolio Segment [Member]
Note 3 - Loans/Leases Receivable (Details) - Nonperforming Loans/Leases [Line Items]
Nonaccrual loans/leases		931,612		1,105,715
Total nonperforming loans/leases	[3],[4]	$ 170,798,682		$ 166,032,416
Percentage of total nonperforming loans/leases		7.75%		6.66%
Finance Leases Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Note 3 - Loans/Leases Receivable (Details) - Nonperforming Loans/Leases [Line Items]
Nonaccrual loans/leases		$ 931,612	[1]	$ 1,105,715	[2]
Troubled debt restructurings - accruing		219,381		233,557
Total nonperforming loans/leases	[4]	1,150,993		1,339,272
Residential Portfolio Segment [Member]
Note 3 - Loans/Leases Receivable (Details) - Nonperforming Loans/Leases [Line Items]
Accruing past due 90 days or more				25,673
Nonaccrual loans/leases		1,420,258		1,299,545
Total nonperforming loans/leases	[4],[5]	$ 161,985,249		$ 158,632,492
Percentage of total nonperforming loans/leases		12.32%		9.02%
Residential Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Note 3 - Loans/Leases Receivable (Details) - Nonperforming Loans/Leases [Line Items]
Accruing past due 90 days or more				$ 25,673
Nonaccrual loans/leases		$ 1,420,258	[1]	1,299,545	[2]
Troubled debt restructurings - accruing		410,484		489,183
Total nonperforming loans/leases	[4]	1,830,742		1,814,401
Consumer Portfolio Segment [Member]
Note 3 - Loans/Leases Receivable (Details) - Nonperforming Loans/Leases [Line Items]
Accruing past due 90 days or more		29,708		6,916
Nonaccrual loans/leases		772,216		645,481
Total nonperforming loans/leases	[4]	$ 72,447,887		$ 72,606,480
Percentage of total nonperforming loans/leases		8.50%		5.55%
Consumer Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Note 3 - Loans/Leases Receivable (Details) - Nonperforming Loans/Leases [Line Items]
Accruing past due 90 days or more		$ 29,708		$ 6,916
Nonaccrual loans/leases		772,216	[1]	645,481	[2]
Troubled debt restructurings - accruing		461,176		462,552
Total nonperforming loans/leases	[4]	$ 1,263,100		$ 1,114,949

[1] Nonaccrual loans/leases includes $3,923,158 of TDRs, including $1,360,265 in commercial and industrial loans, $2,009,695 in commercial real estate loans, $52,245 in direct financing leases, $497,344 in residential real estate loans, and $3,609 in installment loans.

[2] Nonaccrual loans/leases includes $5,013,041 of TDRs, 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.

[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 for the three or six months ended June 30, 2015 and 2014.

[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 TDRs.

[5] Includes residential real estate loans held for sale totaling $1,548,200 and $553,000 as of June 30, 2015, and December 31, 2014, respectively.