Note 3 - Loans/Leases Receivable (Detail) - Impaired Loans/Leases (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Dec. 31, 2011
Impaired Loans/Leases with No Specific Allowance Recorded - Recorded Investment				$ 7,511,233
Impaired Loans/Leases with No Specific Allowance Recorded - UnpaidPrincipal Balance				8,253,794
Impaired Loans/Leases with No Specific Allowance Recorded - Average Recorded Investment	11,115,924	8,349,249
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized	3,513	11,909
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received	3,513	11,909
Impaired Loans/Leases with Specific Allowance Recorded - Recorded Investment				22,347,930
Impaired Loans/Leases with Specific Allowance Recorded - Unpaid Principal Balance				22,847,930
Impaired Loans/Leases with Specific Allowance Recorded - Related Allowance	4,152,560		4,152,560	5,346,303
Impaired Loans/Leases with Specific Allowance Recorded - Average Recorded Investment	15,220,975	16,271,993
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized	88,728	473
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received	88,728	473
Total Impaired Loans/Leases:
Recorded Investment	22,893,312		22,893,312	29,859,163
Unpaid Principal Balance	24,964,458		24,964,458	31,101,724
Related Allowance	4,152,560		4,152,560	5,346,303
Average Recorded Investment	26,336,899	24,621,242	27,860,397
Interest Income Recognized	92,241	12,382	255,071
Interest Income Recognized for Cash Payments Received	92,241	12,382	255,071
Impaired Loans With No Specific Allowance Recorded [Member] | Commercial and Industrial [Member]
Impaired Loans/Leases with No Specific Allowance Recorded - Recorded Investment	845,703		845,703
Impaired Loans/Leases with No Specific Allowance Recorded - UnpaidPrincipal Balance	1,635,373		1,635,373
Impaired Loans/Leases with No Specific Allowance Recorded - Average Recorded Investment			787,146
Impaired Loans With No Specific Allowance Recorded [Member] | Owner-occupied commercial real estate [Member]
Impaired Loans/Leases with No Specific Allowance Recorded - Recorded Investment	542,721		542,721
Impaired Loans/Leases with No Specific Allowance Recorded - UnpaidPrincipal Balance	542,721		542,721
Impaired Loans/Leases with No Specific Allowance Recorded - Average Recorded Investment			657,327
Impaired Loans With No Specific Allowance Recorded [Member] | Commercial construction, land development, and other land [Member]
Impaired Loans/Leases with No Specific Allowance Recorded - Recorded Investment	1,027,200		1,027,200
Impaired Loans/Leases with No Specific Allowance Recorded - UnpaidPrincipal Balance	1,027,200		1,027,200
Impaired Loans/Leases with No Specific Allowance Recorded - Average Recorded Investment			4,441,935
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized			5,552
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received			5,552
Impaired Loans With No Specific Allowance Recorded [Member] | Non-owner occupied Commercial Real Estate [Member]
Impaired Loans/Leases with No Specific Allowance Recorded - Recorded Investment	1,498,599		1,498,599
Impaired Loans/Leases with No Specific Allowance Recorded - UnpaidPrincipal Balance	2,298,599		2,298,599
Impaired Loans/Leases with No Specific Allowance Recorded - Average Recorded Investment			6,613,234
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized			894
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received			894
Impaired Loans With No Specific Allowance Recorded [Member] | Leases receivable [Member]
Impaired Loans/Leases with No Specific Allowance Recorded - Recorded Investment	853,974		853,974
Impaired Loans/Leases with No Specific Allowance Recorded - UnpaidPrincipal Balance	853,974		853,974
Impaired Loans/Leases with No Specific Allowance Recorded - Average Recorded Investment			774,855
Impaired Loans With No Specific Allowance Recorded [Member] | Residential Real Estate [Member]
Impaired Loans/Leases with No Specific Allowance Recorded - Recorded Investment	948,653		948,653
Impaired Loans/Leases with No Specific Allowance Recorded - UnpaidPrincipal Balance	1,131,684		1,131,684
Impaired Loans/Leases with No Specific Allowance Recorded - Average Recorded Investment			861,102
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized			5,037
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received			5,037
Impaired Loans With No Specific Allowance Recorded [Member] | Installment and Other Consumer [Member]
Impaired Loans/Leases with No Specific Allowance Recorded - Recorded Investment	646,466		646,466
Impaired Loans/Leases with No Specific Allowance Recorded - UnpaidPrincipal Balance	646,466		646,466
Impaired Loans/Leases with No Specific Allowance Recorded - Average Recorded Investment			1,014,236
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized			245
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received			245
Impaired Loans With No Specific Allowance Recorded [Member]
Impaired Loans/Leases with No Specific Allowance Recorded - Recorded Investment	6,363,316		6,363,316
Impaired Loans/Leases with No Specific Allowance Recorded - UnpaidPrincipal Balance	8,136,017		8,136,017
Impaired Loans/Leases with No Specific Allowance Recorded - Average Recorded Investment			15,149,835
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized			11,728
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received			11,728
Impaired Loans with Specific Allowance Recorded [Member] | Commercial and Industrial [Member]
Impaired Loans/Leases with Specific Allowance Recorded - Recorded Investment	225,347		225,347
Impaired Loans/Leases with Specific Allowance Recorded - Unpaid Principal Balance	247,599		247,599
Impaired Loans/Leases with Specific Allowance Recorded - Related Allowance	274,666		274,666
Impaired Loans/Leases with Specific Allowance Recorded - Average Recorded Investment			543,668
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized			5,935
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received			5,935
Total Impaired Loans/Leases:
Related Allowance	274,666		274,666
Impaired Loans with Specific Allowance Recorded [Member] | Owner-occupied commercial real estate [Member]
Impaired Loans/Leases with Specific Allowance Recorded - Recorded Investment	0		0
Impaired Loans/Leases with Specific Allowance Recorded - Unpaid Principal Balance	0		0
Impaired Loans/Leases with Specific Allowance Recorded - Related Allowance	0		0
Impaired Loans/Leases with Specific Allowance Recorded - Average Recorded Investment			0
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized			0
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received			0
Total Impaired Loans/Leases:
Related Allowance	0		0
Impaired Loans with Specific Allowance Recorded [Member] | Commercial construction, land development, and other land [Member]
Impaired Loans/Leases with Specific Allowance Recorded - Recorded Investment	2,031,823		2,031,823
Impaired Loans/Leases with Specific Allowance Recorded - Unpaid Principal Balance	2,055,057		2,055,057
Impaired Loans/Leases with Specific Allowance Recorded - Related Allowance	1,373,340		1,373,340
Impaired Loans/Leases with Specific Allowance Recorded - Average Recorded Investment			1,598,548
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized			0
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received			0
Total Impaired Loans/Leases:
Related Allowance	1,373,340		1,373,340
Impaired Loans with Specific Allowance Recorded [Member] | Non-owner occupied Commercial Real Estate [Member]
Impaired Loans/Leases with Specific Allowance Recorded - Recorded Investment	13,350,413		13,350,413
Impaired Loans/Leases with Specific Allowance Recorded - Unpaid Principal Balance	13,603,372		13,603,372
Impaired Loans/Leases with Specific Allowance Recorded - Related Allowance	2,108,785		2,108,785
Impaired Loans/Leases with Specific Allowance Recorded - Average Recorded Investment			9,859,148
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized			237,408
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received			237,408
Total Impaired Loans/Leases:
Related Allowance	2,108,785		2,108,785
Impaired Loans with Specific Allowance Recorded [Member] | Leases receivable [Member]
Impaired Loans/Leases with Specific Allowance Recorded - Recorded Investment	240,750		240,750
Impaired Loans/Leases with Specific Allowance Recorded - Unpaid Principal Balance	240,750		240,750
Impaired Loans/Leases with Specific Allowance Recorded - Related Allowance	157,900		157,900
Impaired Loans/Leases with Specific Allowance Recorded - Average Recorded Investment			177,551
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized			0
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received			0
Total Impaired Loans/Leases:
Related Allowance	157,900		157,900
Impaired Loans with Specific Allowance Recorded [Member] | Residential Real Estate [Member]
Impaired Loans/Leases with Specific Allowance Recorded - Recorded Investment	568,651		568,651
Impaired Loans/Leases with Specific Allowance Recorded - Unpaid Principal Balance	568,651		568,651
Impaired Loans/Leases with Specific Allowance Recorded - Related Allowance	169,196		169,196
Impaired Loans/Leases with Specific Allowance Recorded - Average Recorded Investment			463,361
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized			0
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received			0
Total Impaired Loans/Leases:
Related Allowance	169,196		169,196
Impaired Loans with Specific Allowance Recorded [Member] | Installment and Other Consumer [Member]
Impaired Loans/Leases with Specific Allowance Recorded - Recorded Investment	113,012		113,012
Impaired Loans/Leases with Specific Allowance Recorded - Unpaid Principal Balance	113,012		113,012
Impaired Loans/Leases with Specific Allowance Recorded - Related Allowance	68,673		68,673
Impaired Loans/Leases with Specific Allowance Recorded - Average Recorded Investment			68,286
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized			0
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received			0
Total Impaired Loans/Leases:
Related Allowance	68,673		68,673
Impaired Loans with Specific Allowance Recorded [Member]
Impaired Loans/Leases with Specific Allowance Recorded - Recorded Investment	16,529,996		16,529,996
Impaired Loans/Leases with Specific Allowance Recorded - Unpaid Principal Balance	16,828,441		16,828,441
Impaired Loans/Leases with Specific Allowance Recorded - Related Allowance	4,152,560		4,152,560
Impaired Loans/Leases with Specific Allowance Recorded - Average Recorded Investment			12,710,562
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized			243,343
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received			243,343
Total Impaired Loans/Leases:
Related Allowance	4,152,560		4,152,560
Commercial and Industrial [Member]
Impaired Loans/Leases with No Specific Allowance Recorded - Recorded Investment				360,947
Impaired Loans/Leases with No Specific Allowance Recorded - UnpaidPrincipal Balance				979,901
Impaired Loans/Leases with No Specific Allowance Recorded - Average Recorded Investment	754,844	2,236,289
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized	0	0
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received	0	0
Impaired Loans/Leases with Specific Allowance Recorded - Recorded Investment				1,791,908
Impaired Loans/Leases with Specific Allowance Recorded - Unpaid Principal Balance				1,791,908
Impaired Loans/Leases with Specific Allowance Recorded - Related Allowance	274,666		274,666	903,187
Impaired Loans/Leases with Specific Allowance Recorded - Average Recorded Investment	223,917	1,534,968
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized	1,984
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received	1,984
Total Impaired Loans/Leases:
Recorded Investment	1,071,050		1,071,050	2,152,855
Unpaid Principal Balance	1,882,972		1,882,972	2,771,809
Related Allowance	274,666		274,666	903,187
Average Recorded Investment	978,761	3,771,257	1,330,814
Interest Income Recognized	1,984		5,935
Interest Income Recognized for Cash Payments Received	1,984		5,935
Owner-occupied commercial real estate [Member]
Impaired Loans/Leases with No Specific Allowance Recorded - Recorded Investment				736,610
Impaired Loans/Leases with No Specific Allowance Recorded - UnpaidPrincipal Balance				736,610
Impaired Loans/Leases with No Specific Allowance Recorded - Average Recorded Investment	550,725	1,774,342
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized	0	11,909
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received	0	11,909
Impaired Loans/Leases with Specific Allowance Recorded - Recorded Investment				217,059
Impaired Loans/Leases with Specific Allowance Recorded - Unpaid Principal Balance				217,059
Impaired Loans/Leases with Specific Allowance Recorded - Related Allowance	0		0	47,911
Impaired Loans/Leases with Specific Allowance Recorded - Average Recorded Investment		360,894
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized	0
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received	0
Total Impaired Loans/Leases:
Recorded Investment	542,721		542,721	953,669
Unpaid Principal Balance	542,721		542,721	953,669
Related Allowance	0		0	47,911
Average Recorded Investment	550,725	2,135,236	657,327
Interest Income Recognized	0	11,909	0
Interest Income Recognized for Cash Payments Received	0	11,909	0
Commercial construction, land development, and other land [Member]
Impaired Loans/Leases with No Specific Allowance Recorded - Average Recorded Investment	1,323,689	286,339
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized	1,701
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received	1,701
Impaired Loans/Leases with Specific Allowance Recorded - Recorded Investment				9,051,455
Impaired Loans/Leases with Specific Allowance Recorded - Unpaid Principal Balance				9,051,455
Impaired Loans/Leases with Specific Allowance Recorded - Related Allowance	1,373,340		1,373,340	3,002,450
Impaired Loans/Leases with Specific Allowance Recorded - Average Recorded Investment	3,481,385	5,881,823
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized	1,701	473
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received	1,701	473
Total Impaired Loans/Leases:
Recorded Investment	3,059,023		3,059,023	9,051,455
Unpaid Principal Balance	3,082,257		3,082,257	9,051,455
Related Allowance	1,373,340		1,373,340	3,002,450
Average Recorded Investment	2,157,696	5,595,484	6,040,483
Interest Income Recognized	0	473	5,552
Interest Income Recognized for Cash Payments Received	0	473	5,552
Non-owner occupied Commercial Real Estate [Member]
Impaired Loans/Leases with No Specific Allowance Recorded - Recorded Investment				3,936,826
Impaired Loans/Leases with No Specific Allowance Recorded - UnpaidPrincipal Balance				3,986,820
Impaired Loans/Leases with No Specific Allowance Recorded - Average Recorded Investment	5,798,404	1,730,764
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized	0	0
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received	0	0
Impaired Loans/Leases with Specific Allowance Recorded - Recorded Investment				10,339,415
Impaired Loans/Leases with Specific Allowance Recorded - Unpaid Principal Balance				10,839,415
Impaired Loans/Leases with Specific Allowance Recorded - Related Allowance	2,108,785		2,108,785	1,247,377
Impaired Loans/Leases with Specific Allowance Recorded - Average Recorded Investment	12,036,134	7,488,032
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized	86,744	0
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received	86,744	0
Total Impaired Loans/Leases:
Recorded Investment	14,849,012		14,849,012	14,276,241
Unpaid Principal Balance	15,901,971		15,901,971	14,826,235
Related Allowance	2,108,785		2,108,785	1,247,377
Average Recorded Investment	17,834,538	9,218,796	16,472,382
Interest Income Recognized	86,744	0	238,302
Interest Income Recognized for Cash Payments Received	86,744	0	238,302
Leases receivable [Member]
Impaired Loans/Leases with No Specific Allowance Recorded - Recorded Investment				1,094,178
Impaired Loans/Leases with No Specific Allowance Recorded - UnpaidPrincipal Balance				1,094,178
Impaired Loans/Leases with No Specific Allowance Recorded - Average Recorded Investment	680,817	668,944
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized	0	0
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received	0	0
Impaired Loans/Leases with Specific Allowance Recorded - Recorded Investment				212,485
Impaired Loans/Leases with Specific Allowance Recorded - Unpaid Principal Balance				212,485
Impaired Loans/Leases with Specific Allowance Recorded - Related Allowance	157,900		157,900	66,675
Impaired Loans/Leases with Specific Allowance Recorded - Average Recorded Investment	210,299	983,131
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized	0	0
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received	0	0
Total Impaired Loans/Leases:
Recorded Investment	1,094,724		1,094,724	1,306,663
Unpaid Principal Balance	1,094,724		1,094,724	1,306,663
Related Allowance	157,900		157,900	66,675
Average Recorded Investment	891,116	1,652,075	952,406
Interest Income Recognized	0	0	0
Interest Income Recognized for Cash Payments Received	0	0	0
Residential Real Estate [Member]
Impaired Loans/Leases with No Specific Allowance Recorded - Recorded Investment				788,685
Impaired Loans/Leases with No Specific Allowance Recorded - UnpaidPrincipal Balance				862,298
Impaired Loans/Leases with No Specific Allowance Recorded - Average Recorded Investment	943,926	942,011
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized	1,691
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received	1,691
Impaired Loans/Leases with Specific Allowance Recorded - Recorded Investment				344,789
Impaired Loans/Leases with Specific Allowance Recorded - Unpaid Principal Balance				344,789
Impaired Loans/Leases with Specific Allowance Recorded - Related Allowance	169,196		169,196	55,884
Impaired Loans/Leases with Specific Allowance Recorded - Average Recorded Investment	524,031	200,625
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized	0	0
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received	0	0
Total Impaired Loans/Leases:
Recorded Investment	1,517,304		1,517,304	1,133,474
Unpaid Principal Balance	1,700,335		1,700,335	1,207,087
Related Allowance	169,196		169,196	55,884
Average Recorded Investment	1,467,957	1,142,636	1,324,463
Interest Income Recognized	1,691	0	5,037
Interest Income Recognized for Cash Payments Received	1,691	0	5,037
Installment and Other Consumer [Member]
Impaired Loans/Leases with No Specific Allowance Recorded - Recorded Investment				593,987
Impaired Loans/Leases with No Specific Allowance Recorded - UnpaidPrincipal Balance				593,987
Impaired Loans/Leases with No Specific Allowance Recorded - Average Recorded Investment	1,063,519	710,560
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized	121	0
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received	121	0
Impaired Loans/Leases with Specific Allowance Recorded - Recorded Investment				390,819
Impaired Loans/Leases with Specific Allowance Recorded - Unpaid Principal Balance				390,819
Impaired Loans/Leases with Specific Allowance Recorded - Related Allowance	68,673		68,673	22,819
Impaired Loans/Leases with Specific Allowance Recorded - Average Recorded Investment	68,898	108,859
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized	0	0
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received	0	0
Total Impaired Loans/Leases:
Recorded Investment	759,478		759,478	984,806
Unpaid Principal Balance	759,478		759,478	984,806
Related Allowance	68,673		68,673	22,819
Average Recorded Investment	1,132,417	819,419	1,082,522
Interest Income Recognized	121	0	245
Interest Income Recognized for Cash Payments Received	$ 121	$ 0	$ 245