Note 3 - Loans/Leases Receivable (Details) - Allowance for Estimated Losses on Loans/Leases (USD $)	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013	Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning	$ 21,448,048		$ 19,925,204
Balance, ending	22,653,270		20,769,462
Loans/leases individually evaluated for impairment	17,871,547			19,080,420
Loans/leases collectively evaluated for impairment	1,469,460,949			1,436,652,213
Loans/Leases receivable	1,487,332,496			1,455,732,633
Allowance as a percentage of loans/leases individually evaluated for impairment	24.42%			26.25%
Allowance as a percentage of loans/leases collectively evaluated for impairment	1.24%			1.14%
Total allowancе as a pеrcеntagе of total loans/lеaеss	1.52%			1.47%
Allowance for loans/leases individually evaluated for impairment	4,365,071			5,008,822
Allowance for loans/leases collectively evaluated for impairment	18,288,199			16,439,226
Provisions charged to expense	1,094,162		1,057,782
Loans/leases charged off	(79,321)		(302,767)
Recoveries on loans/leases previously charged off	190,381		89,243
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning	5,648,774		4,531,545
Balance, ending	6,647,658		4,466,264
Loans/leases individually evaluated for impairment	1,400,758			1,761,850
Loans/leases collectively evaluated for impairment	440,949,717			429,926,279
Loans/Leases receivable	442,350,475			431,688,129
Allowance as a percentage of loans/leases individually evaluated for impairment	52.29%			52.64%
Allowance as a percentage of loans/leases collectively evaluated for impairment	1.34%			1.10%
Total allowancе as a pеrcеntagе of total loans/lеaеss	1.50%			1.31%
Allowance for loans/leases individually evaluated for impairment	732,427			927,453
Allowance for loans/leases collectively evaluated for impairment	5,915,231			4,721,321
Provisions charged to expense	976,790		(87,807)
Loans/leases charged off	(4,023)		(215)
Recoveries on loans/leases previously charged off	26,117		22,741
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning	10,705,434		11,069,502
Balance, ending	10,587,657		12,188,953
Loans/leases individually evaluated for impairment	12,076,304			12,956,915
Loans/leases collectively evaluated for impairment	667,151,901			658,796,014
Loans/Leases receivable	679,228,205			671,752,929
Allowance as a percentage of loans/leases individually evaluated for impairment	22.46%			24.50%
Allowance as a percentage of loans/leases collectively evaluated for impairment	1.18%			1.14%
Total allowancе as a pеrcеntagе of total loans/lеaеss	1.56%			1.59%
Allowance for loans/leases individually evaluated for impairment	2,712,472			3,174,704
Allowance for loans/leases collectively evaluated for impairment	7,875,185			7,530,730
Provisions charged to expense	(229,985)		1,114,294
Loans/leases charged off	(4,098)
Recoveries on loans/leases previously charged off	116,306		5,157
Finance Leases Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning	2,517,217		1,990,395
Balance, ending	2,820,239		2,296,523
Loans/leases individually evaluated for impairment	1,320,642			894,458
Loans/leases collectively evaluated for impairment	138,673,417			128,006,984
Loans/Leases receivable	139,994,059			128,901,442
Allowance as a percentage of loans/leases individually evaluated for impairment	22.59%			21.56%
Allowance as a percentage of loans/leases collectively evaluated for impairment	1.82%			1.82%
Total allowancе as a pеrcеntagе of total loans/lеaеss	2.01%			1.95%
Allowance for loans/leases individually evaluated for impairment	298,303			192,847
Allowance for loans/leases collectively evaluated for impairment	2,521,936			2,324,370
Provisions charged to expense	352,647		378,623
Loans/leases charged off	(65,733)		(73,049)
Recoveries on loans/leases previously charged off	16,108		554
Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning	1,395,849		1,070,328
Balance, ending	1,388,885		966,336
Loans/leases individually evaluated for impairment	1,843,608			2,116,747
Loans/leases collectively evaluated for impairment	147,106,609			145,239,576
Loans/Leases receivable	148,950,217	[1]		147,356,323	[1]
Allowance as a percentage of loans/leases individually evaluated for impairment	12.20%			11.63%
Allowance as a percentage of loans/leases collectively evaluated for impairment	0.79%			0.79%
Total allowancе as a pеrcеntagе of total loans/lеaеss	0.93%			0.95%
Allowance for loans/leases individually evaluated for impairment	224,972			246,266
Allowance for loans/leases collectively evaluated for impairment	1,163,913			1,149,583
Provisions charged to expense	(4,355)		8,899
Loans/leases charged off	(2,712)		(112,891)
Recoveries on loans/leases previously charged off	103
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning	1,180,774		1,263,434
Balance, ending	1,208,831		851,386
Loans/leases individually evaluated for impairment	1,230,235			1,350,450
Loans/leases collectively evaluated for impairment	75,579,305			74,683,360
Loans/Leases receivable	76,809,540			76,033,810
Allowance as a percentage of loans/leases individually evaluated for impairment	32.26%			34.62%
Allowance as a percentage of loans/leases collectively evaluated for impairment	1.07%			0.95%
Total allowancе as a pеrcеntagе of total loans/lеaеss	1.57%			1.55%
Allowance for loans/leases individually evaluated for impairment	396,897			467,552
Allowance for loans/leases collectively evaluated for impairment	811,934			713,222
Provisions charged to expense	(935)		(356,227)
Loans/leases charged off	(2,755)		(116,612)
Recoveries on loans/leases previously charged off	$ 31,747		$ 60,791

[1] Includes residential real estate loans held for sale totaling $291,600 and $1,358,290 as of March 31, 2014, and December 31, 2013, respectively.