Note 4 - Loans Leases Receivable (Details Textual)	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)		Dec. 31, 2014 USD ($)
Losses on Residual Value	$ 0	$ 0		$ 0
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group, Mortgage	1,135,500	565,850
Financing Receivable, Recorded Investment, Nonaccrual Status	13,919,066	10,648,211	[1]
Financing Receivable, Modifications, Recorded Investment	$ 8,647,007	$ 2,587,413
Financing Receivable, Modifications, Number of Contracts	29	2
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 7,880,881	$ 37,979
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	341,952
Threshold for Related Party Loans Evaluated	$ 60,000	$ 60,000		$ 60,000
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Nonaccrual [Member]
Financing Receivable, Modifications, Number of Contracts	8	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 2,008,424	$ 14,027
Troubled Debt Restructurings [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	2,300,479	1,533,657
Residential Portfolio Segment [Member]
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group, Mortgage	1,135,500	565,850
Financing Receivable, Recorded Investment, Nonaccrual Status	1,075,639	1,016,743	[1]
Residential Portfolio Segment [Member] | Troubled Debt Restructurings [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	43,579	119,305
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	4,187,786	5,791,975	[1]
Commercial Portfolio Segment [Member] | Troubled Debt Restructurings [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	48,501	1,164,423
Commercial Real Estate Portfolio Segment [Member] | Troubled Debt Restructurings [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	1,380,047	193,804
Finance Leases Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	2,446,181	1,701,341	[1]
Finance Leases Portfolio Segment [Member] | Troubled Debt Restructurings [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	816,149	42,098
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	87,344	109,117	[1]
Consumer Portfolio Segment [Member] | Troubled Debt Restructurings [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	$ 12,203	$ 14,027
No Lease End Option Rider [Member]
Number of Leases	13	16
Leveraged Lease Investment	$ 1,085,164	$ 1,165,706

[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.