Note 13 - Federal and State Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Alternative minimum tax credits	$ 6,513,502	$ 5,475,062
New markets tax credits	1,797,587	2,700,000
Net unrealized losses on securities available for sale and derivative instruments	1,470,759	1,268,068
Compensation	8,737,976	8,687,856
Loan/lease losses	10,479,227	8,802,271
Net operating loss carryforwards, federal and state	1,879,746	2,069,093
Other	247,594	452,854
	31,126,391	29,455,204
Premises and equipment	4,899,107	1,173,966
Equipment financing leases	22,050,540	25,059,159
Acquisition fair value adjustments	1,336,338	1,755,874
Investment accretion	46,581	44,462
Deferred loan origination fees, net	261,915	137,461
Other	456,219	678,227
	29,050,700	28,849,149
Net deferred tax asset	$ 2,075,691	$ 606,055