Note 3 - Loans/Leases Receivable (Detail) - Information For Impaired Loans/Leases by Classes of Financing Receivable (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:
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 No Specific Allowance Recorded - Recorded Investment				7,511,233
Impaired Loans/Leases with No Specific Allowance Recorded - Unpaid Principal Balance				8,253,794
Impaired Loans/Leases with Specific Allowance Recorded:
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
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
Commercial Real Estate
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
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
Commercial and Industrial [Member]
Impaired Loans/Leases with No Specific Allowance Recorded:
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 No Specific Allowance Recorded - Recorded Investment				360,947
Impaired Loans/Leases with No Specific Allowance Recorded - Unpaid Principal Balance				979,901
Impaired Loans/Leases with Specific Allowance Recorded:
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
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
Commercial Real Estate
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
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
Owner-occupied commercial real estate [Member]
Impaired Loans/Leases with No Specific Allowance Recorded:
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 No Specific Allowance Recorded - Recorded Investment				736,610
Impaired Loans/Leases with No Specific Allowance Recorded - Unpaid Principal Balance				736,610
Impaired Loans/Leases with Specific Allowance Recorded:
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
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
Commercial Real Estate
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
Recorded Investment	542,721		542,721	953,669
Unpaid Principal Balance	542,721		542,721	953,669
Related Allowance	0		0	47,911
Commercial construction, land development, and other land [Member]
Impaired Loans/Leases with No Specific Allowance Recorded:
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:
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
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
Commercial Real Estate
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
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
Non-owner occupied Commercial Real Estate [Member]
Impaired Loans/Leases with No Specific Allowance Recorded:
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 No Specific Allowance Recorded - Recorded Investment				3,936,826
Impaired Loans/Leases with No Specific Allowance Recorded - Unpaid Principal Balance				3,986,820
Impaired Loans/Leases with Specific Allowance Recorded:
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
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
Commercial Real Estate
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
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
Leases receivable [Member]
Impaired Loans/Leases with No Specific Allowance Recorded:
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 No Specific Allowance Recorded - Recorded Investment				1,094,178
Impaired Loans/Leases with No Specific Allowance Recorded - Unpaid Principal Balance				1,094,178
Impaired Loans/Leases with Specific Allowance Recorded:
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
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
Commercial Real Estate
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
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
Residential Real Estate [Member]
Impaired Loans/Leases with No Specific Allowance Recorded:
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 No Specific Allowance Recorded - Recorded Investment				788,685
Impaired Loans/Leases with No Specific Allowance Recorded - Unpaid Principal Balance				862,298
Impaired Loans/Leases with Specific Allowance Recorded:
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
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
Commercial Real Estate
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
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
Installment and Other Consumer [Member]
Impaired Loans/Leases with No Specific Allowance Recorded:
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 No Specific Allowance Recorded - Recorded Investment				593,987
Impaired Loans/Leases with No Specific Allowance Recorded - Unpaid Principal Balance				593,987
Impaired Loans/Leases with Specific Allowance Recorded:
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
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
Commercial Real Estate
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
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