Note 3 - Loans/Leases Receivable (Details) - Allowance for Estimated Losses on Loans/Leases (USD $)	3 Months Ended			9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013	Sep. 30, 2014		Sep. 30, 2013	Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning	$ 23,067,024		$ 21,156,379	$ 21,448,048		$ 19,925,204
Provisions charged to expense	1,063,323		1,366,984	3,159,364		3,944,903
Loans/leases charged off	(1,731,502)		(927,637)	(2,486,800)		(2,563,311)
Recoveries on loans/leases previously charged off	369,072		466,663	647,305		755,593
Balance, ending	22,767,917		22,062,389	22,767,917		22,062,389
Allowance for loans/leases individually evaluated for impairment	5,480,762			5,480,762			5,008,822
Allowance for loans/leases collectively evaluated for impairment	17,287,155			17,287,155			16,439,226
Allowance for loans/leases collectively and individually evaluated for impairment	22,767,917		22,062,389	22,767,917		22,062,389
Loans/leases individually evaluated for impairment	27,297,215			27,297,215			19,080,420
Loans/leases collectively evaluated for impairment	1,539,368,149			1,539,368,149			1,436,652,213
Loans/Leases individually and collectively evaluated for impairment	1,566,665,364			1,566,665,364			1,455,732,633
Allowance as a percentage of loans/leases individually evaluated for impairment	20.08%			20.08%			26.25%
Allowance as a percentage of loans/leases collectively evaluated for impairment	1.12%			1.12%			1.14%
Total allowancе as a pеrcеntagе of total loans/lеaеss	1.45%			1.45%			1.47%
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning	6,549,378		4,790,828	5,648,774		4,531,545
Provisions charged to expense	851,542		765,582	1,930,050		1,026,073
Loans/leases charged off	(741,127)		(214,920)	(967,207)		(253,820)
Recoveries on loans/leases previously charged off	254,265		26,034	302,441		63,726
Balance, ending	6,914,058		5,367,524	6,914,058		5,367,524
Allowance for loans/leases individually evaluated for impairment	2,204,926			2,204,926			927,453
Allowance for loans/leases collectively evaluated for impairment	4,709,132			4,709,132			4,721,321
Allowance for loans/leases collectively and individually evaluated for impairment	6,914,058		5,367,524	6,914,058		5,367,524
Loans/leases individually evaluated for impairment	8,258,681			8,258,681			1,761,850
Loans/leases collectively evaluated for impairment	471,488,378			471,488,378			429,926,279
Loans/Leases individually and collectively evaluated for impairment	479,747,059			479,747,059			431,688,129
Allowance as a percentage of loans/leases individually evaluated for impairment	26.70%			26.70%			52.64%
Allowance as a percentage of loans/leases collectively evaluated for impairment	1.00%			1.00%			1.10%
Total allowancе as a pеrcеntagе of total loans/lеaеss	1.44%			1.44%			1.31%
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning	10,277,692		12,190,497	10,705,434		11,069,502
Provisions charged to expense	(196,865)		88,761	(460,356)		1,875,132
Loans/leases charged off	(120,505)		(443,721)	(436,056)		(1,264,446)
Recoveries on loans/leases previously charged off	68,346		375,325	219,646		530,674
Balance, ending	10,028,668		12,210,862	10,028,668		12,210,862
Allowance for loans/leases individually evaluated for impairment	2,473,500			2,473,500			3,174,704
Allowance for loans/leases collectively evaluated for impairment	7,555,168			7,555,168			7,530,730
Allowance for loans/leases collectively and individually evaluated for impairment	10,028,668		12,210,862	10,028,668		12,210,862
Loans/leases individually evaluated for impairment	14,431,006			14,431,006			12,956,915
Loans/leases collectively evaluated for impairment	683,297,027			683,297,027			658,796,014
Loans/Leases individually and collectively evaluated for impairment	697,728,033			697,728,033			671,752,929
Allowance as a percentage of loans/leases individually evaluated for impairment	17.14%			17.14%			24.50%
Allowance as a percentage of loans/leases collectively evaluated for impairment	1.11%			1.11%			1.14%
Total allowancе as a pеrcеntagе of total loans/lеaеss	1.44%			1.44%			1.59%
Finance Leases Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning	3,319,131		2,187,605	2,517,217	[1]	1,990,395
Provisions charged to expense	509,657		338,984	1,428,678		1,057,744
Loans/leases charged off	(741,478)		(203,724)	(885,966)		(726,395)
Recoveries on loans/leases previously charged off	19,577		644	46,958		1,765
Balance, ending	3,106,887	[1]	2,323,509	3,106,887	[1]	2,323,509
Allowance for loans/leases individually evaluated for impairment	165,617			165,617			192,847
Allowance for loans/leases collectively evaluated for impairment	2,941,270			2,941,270			2,324,370
Allowance for loans/leases collectively and individually evaluated for impairment	3,106,887	[1]	2,323,509	3,106,887	[1]	2,323,509
Loans/leases individually evaluated for impairment	1,669,717			1,669,717			894,458
Loans/leases collectively evaluated for impairment	160,806,362			160,806,362			128,006,984
Loans/Leases individually and collectively evaluated for impairment	162,476,079	[1]		162,476,079	[1]		128,901,442	[1]
Allowance as a percentage of loans/leases individually evaluated for impairment	9.92%			9.92%			21.56%
Allowance as a percentage of loans/leases collectively evaluated for impairment	1.83%			1.83%			1.82%
Total allowancе as a pеrcеntagе of total loans/lеaеss	1.91%			1.91%			1.95%
Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning	1,439,185		1,165,341	1,395,849		1,070,328
Provisions charged to expense	(53,963)		102,523	42,712		307,196
Loans/leases charged off	(42,022)		(13,599)	(95,464)		(126,490)
Recoveries on loans/leases previously charged off	9,870		13,240	9,973		16,471
Balance, ending	1,353,070		1,267,505	1,353,070		1,267,505
Allowance for loans/leases individually evaluated for impairment	129,859			129,859			246,266
Allowance for loans/leases collectively evaluated for impairment	1,223,211			1,223,211			1,149,583
Allowance for loans/leases collectively and individually evaluated for impairment	1,353,070		1,267,505	1,353,070		1,267,505
Loans/leases individually evaluated for impairment	1,659,722			1,659,722			2,116,747
Loans/leases collectively evaluated for impairment	153,294,298			153,294,298			145,239,576
Loans/Leases individually and collectively evaluated for impairment	154,954,020	[2]		154,954,020	[2]		147,356,323	[2]
Allowance as a percentage of loans/leases individually evaluated for impairment	7.82%			7.82%			11.63%
Allowance as a percentage of loans/leases collectively evaluated for impairment	0.80%			0.80%			0.79%
Total allowancе as a pеrcеntagе of total loans/lеaеss	0.87%			0.87%			0.95%
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning	1,481,638		822,108	1,180,774		1,263,434
Provisions charged to expense	(47,048)		71,134	218,280		(321,242)
Loans/leases charged off	(86,370)		(51,673)	(102,107)		(192,160)
Recoveries on loans/leases previously charged off	17,014		51,420	68,287		142,957
Balance, ending	1,365,234		892,989	1,365,234		892,989
Allowance for loans/leases individually evaluated for impairment	506,860			506,860			467,552
Allowance for loans/leases collectively evaluated for impairment	858,374			858,374			713,222
Allowance for loans/leases collectively and individually evaluated for impairment	1,365,234		892,989	1,365,234		892,989
Loans/leases individually evaluated for impairment	1,278,089			1,278,089			1,350,450
Loans/leases collectively evaluated for impairment	70,482,084			70,482,084			74,683,360
Loans/Leases individually and collectively evaluated for impairment	$ 71,760,173			$ 71,760,173			$ 76,033,810
Allowance as a percentage of loans/leases individually evaluated for impairment	39.66%			39.66%			34.62%
Allowance as a percentage of loans/leases collectively evaluated for impairment	1.22%			1.22%			0.95%
Total allowancе as a pеrcеntagе of total loans/lеaеss	1.90%			1.90%			1.55%

[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 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 and nine months ended September 30, 2014 and 2013.

[2] Includes residential real estate loans held for sale totaling $1,642,300 and $1,358,290 as of September 30, 2014, and December 31, 2013, respectively.