Note 3 - Loans/Leases Receivable (Detail) - Impaired Loans/Leases (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 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	15,604,148	9,897,081
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized	3,457	0
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received	3,457	0
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	3,650,962		3,650,962	5,346,303
Impaired Loans/Leases with Specific Allowance Recorded - Average Recorded Investment	11,667,009	16,975,316
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized	85,084	19,850
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received	85,084	19,850
Total Impaired Loans/Leases:
Recorded Investment	25,161,521		25,161,521	29,859,163
Unpaid Principal Balance	27,317,874		27,317,874	31,101,724
Related Allowance	3,650,962		3,650,962	5,346,303
Average Recorded Investment	27,271,157	26,872,397	28,382,107
Interest Income Recognized	88,541	19,850	162,830
Interest Income Recognized for Cash Payments Received	88,541	19,850	162,830
Impaired Loans With No Specific Allowance Recorded [Member] | Commercial and Industrial [Member]
Impaired Loans/Leases with No Specific Allowance Recorded - Recorded Investment	679,015		679,015
Impaired Loans/Leases with No Specific Allowance Recorded - UnpaidPrincipal Balance	1,410,800		1,410,800
Impaired Loans/Leases with No Specific Allowance Recorded - Average Recorded Investment			1,230,600
Impaired Loans With No Specific Allowance Recorded [Member] | Owner-occupied commercial real estate [Member]
Impaired Loans/Leases with No Specific Allowance Recorded - Recorded Investment	555,729		555,729
Impaired Loans/Leases with No Specific Allowance Recorded - UnpaidPrincipal Balance	555,729		555,729
Impaired Loans/Leases with No Specific Allowance Recorded - Average Recorded Investment			711,463
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	1,427,018		1,427,018
Impaired Loans/Leases with No Specific Allowance Recorded - UnpaidPrincipal Balance	2,009,619		2,009,619
Impaired Loans/Leases with No Specific Allowance Recorded - Average Recorded Investment			5,041,106
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized			3,851
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received			3,851
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	4,700,668		4,700,668
Impaired Loans/Leases with No Specific Allowance Recorded - UnpaidPrincipal Balance	5,500,668		5,500,668
Impaired Loans/Leases with No Specific Allowance Recorded - Average Recorded Investment			6,864,499
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	569,233		569,233
Impaired Loans/Leases with No Specific Allowance Recorded - UnpaidPrincipal Balance	569,233		569,233
Impaired Loans/Leases with No Specific Allowance Recorded - Average Recorded Investment			804,542
Impaired Loans With No Specific Allowance Recorded [Member] | Residential Real Estate [Member]
Impaired Loans/Leases with No Specific Allowance Recorded - Recorded Investment	733,354		733,354
Impaired Loans/Leases with No Specific Allowance Recorded - UnpaidPrincipal Balance	733,354		733,354
Impaired Loans/Leases with No Specific Allowance Recorded - Average Recorded Investment			784,598
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized			3,346
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received			3,346
Impaired Loans With No Specific Allowance Recorded [Member] | Installment and Other Consumer [Member]
Impaired Loans/Leases with No Specific Allowance Recorded - Recorded Investment	963,365		963,365
Impaired Loans/Leases with No Specific Allowance Recorded - UnpaidPrincipal Balance	982,097		982,097
Impaired Loans/Leases with No Specific Allowance Recorded - Average Recorded Investment			972,903
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized			124
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received			124
Impaired Loans With No Specific Allowance Recorded [Member]
Impaired Loans/Leases with No Specific Allowance Recorded - Recorded Investment	9,628,382		9,628,382
Impaired Loans/Leases with No Specific Allowance Recorded - UnpaidPrincipal Balance	11,761,500		11,761,500
Impaired Loans/Leases with No Specific Allowance Recorded - Average Recorded Investment			16,409,711
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized			8,215
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received			8,215
Impaired Loans with Specific Allowance Recorded [Member] | Commercial and Industrial [Member]
Impaired Loans/Leases with Specific Allowance Recorded - Recorded Investment	332,889		332,889
Impaired Loans/Leases with Specific Allowance Recorded - Unpaid Principal Balance	332,889		332,889
Impaired Loans/Leases with Specific Allowance Recorded - Related Allowance	265,046		265,046
Impaired Loans/Leases with Specific Allowance Recorded - Average Recorded Investment			281,764
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized			3,951
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received			3,951
Total Impaired Loans/Leases:
Related Allowance	265,046		265,046
Impaired Loans with Specific Allowance Recorded [Member] | Owner-occupied commercial real estate [Member]
Impaired Loans/Leases with Specific Allowance Recorded - Recorded Investment	66,660		66,660
Impaired Loans/Leases with Specific Allowance Recorded - Unpaid Principal Balance	66,660		66,660
Impaired Loans/Leases with Specific Allowance Recorded - Related Allowance	1,276		1,276
Impaired Loans/Leases with Specific Allowance Recorded - Average Recorded Investment			66,660
Total Impaired Loans/Leases:
Related Allowance	1,276		1,276
Impaired Loans with Specific Allowance Recorded [Member] | Commercial construction, land development, and other land [Member]
Impaired Loans/Leases with Specific Allowance Recorded - Recorded Investment	2,352,865		2,352,865
Impaired Loans/Leases with Specific Allowance Recorded - Unpaid Principal Balance	2,376,100		2,376,100
Impaired Loans/Leases with Specific Allowance Recorded - Related Allowance	1,018,457		1,018,457
Impaired Loans/Leases with Specific Allowance Recorded - Average Recorded Investment			2,328,678
Total Impaired Loans/Leases:
Related Allowance	1,018,457		1,018,457
Impaired Loans with Specific Allowance Recorded [Member] | Non-owner occupied Commercial Real Estate [Member]
Impaired Loans/Leases with Specific Allowance Recorded - Recorded Investment	12,202,355		12,202,355
Impaired Loans/Leases with Specific Allowance Recorded - Unpaid Principal Balance	12,202,355		12,202,355
Impaired Loans/Leases with Specific Allowance Recorded - Related Allowance	2,155,993		2,155,993
Impaired Loans/Leases with Specific Allowance Recorded - Average Recorded Investment			8,771,552
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized			150,664
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received			150,664
Total Impaired Loans/Leases:
Related Allowance	2,155,993		2,155,993
Impaired Loans with Specific Allowance Recorded [Member] | Leases receivable [Member]
Impaired Loans/Leases with Specific Allowance Recorded - Recorded Investment	118,275		118,275
Impaired Loans/Leases with Specific Allowance Recorded - Unpaid Principal Balance	118,275		118,275
Impaired Loans/Leases with Specific Allowance Recorded - Related Allowance	90,000		90,000
Impaired Loans/Leases with Specific Allowance Recorded - Average Recorded Investment			100,425
Total Impaired Loans/Leases:
Related Allowance	90,000		90,000
Impaired Loans with Specific Allowance Recorded [Member] | Residential Real Estate [Member]
Impaired Loans/Leases with Specific Allowance Recorded - Recorded Investment	457,782		457,782
Impaired Loans/Leases with Specific Allowance Recorded - Unpaid Principal Balance	457,782		457,782
Impaired Loans/Leases with Specific Allowance Recorded - Related Allowance	117,877		117,877
Impaired Loans/Leases with Specific Allowance Recorded - Average Recorded Investment			421,985
Total Impaired Loans/Leases:
Related Allowance	117,877		117,877
Impaired Loans with Specific Allowance Recorded [Member] | Installment and Other Consumer [Member]
Impaired Loans/Leases with Specific Allowance Recorded - Recorded Investment	2,313		2,313
Impaired Loans/Leases with Specific Allowance Recorded - Unpaid Principal Balance	2,313		2,313
Impaired Loans/Leases with Specific Allowance Recorded - Related Allowance	2,313		2,313
Impaired Loans/Leases with Specific Allowance Recorded - Average Recorded Investment			1,332
Total Impaired Loans/Leases:
Related Allowance	2,313		2,313
Impaired Loans with Specific Allowance Recorded [Member]
Impaired Loans/Leases with Specific Allowance Recorded - Recorded Investment	15,533,139		15,533,139
Impaired Loans/Leases with Specific Allowance Recorded - Unpaid Principal Balance	15,556,374		15,556,374
Impaired Loans/Leases with Specific Allowance Recorded - Related Allowance	3,650,962		3,650,962
Impaired Loans/Leases with Specific Allowance Recorded - Average Recorded Investment			11,972,396
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized			154,615
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received			154,615
Total Impaired Loans/Leases:
Related Allowance	3,650,962		3,650,962
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	870,085	1,455,378
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	265,046		265,046	903,187
Impaired Loans/Leases with Specific Allowance Recorded - Average Recorded Investment	314,872	3,666,049
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized	1,971	1,705
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received	1,971	1,705
Total Impaired Loans/Leases:
Recorded Investment	1,011,904		1,011,904	2,152,855
Unpaid Principal Balance	1,743,689		1,743,689	2,771,809
Related Allowance	265,046		265,046	903,187
Average Recorded Investment	1,184,957	5,121,427	1,512,364
Interest Income Recognized	1,971	1,705	3,951
Interest Income Recognized for Cash Payments Received	1,971	1,705	3,951
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	668,313	1,737,998
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				217,059
Impaired Loans/Leases with Specific Allowance Recorded - Unpaid Principal Balance				217,059
Impaired Loans/Leases with Specific Allowance Recorded - Related Allowance	1,276		1,276	47,911
Impaired Loans/Leases with Specific Allowance Recorded - Average Recorded Investment	66,660	370,843
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized	0	18,145
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received	0	18,145
Total Impaired Loans/Leases:
Recorded Investment	622,389		622,389	953,669
Unpaid Principal Balance	622,389		622,389	953,669
Related Allowance	1,276		1,276	47,911
Average Recorded Investment	734,973	2,108,841	778,123
Interest Income Recognized	0	18,145
Interest Income Recognized for Cash Payments Received	0	18,145
Commercial construction, land development, and other land [Member]
Impaired Loans/Leases with No Specific Allowance Recorded - Average Recorded Investment	4,773,032	184,693
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized	1,683
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received	1,683
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	1,018,457		1,018,457	3,002,450
Impaired Loans/Leases with Specific Allowance Recorded - Average Recorded Investment	2,348,194	4,688,045
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	3,779,883		3,779,883	9,051,455
Unpaid Principal Balance	4,385,719		4,385,719	9,051,455
Related Allowance	1,018,457		1,018,457	3,002,450
Average Recorded Investment	7,121,226	4,872,738	7,369,784
Interest Income Recognized	1,683	0	3,851
Interest Income Recognized for Cash Payments Received	1,683	0	3,851
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	6,997,797	3,840,268
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	2,155,993		2,155,993	1,247,377
Impaired Loans/Leases with Specific Allowance Recorded - Average Recorded Investment	8,354,604	7,130,672
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized	83,113	0
Impaired Loans/Leases with Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received	83,113	0
Total Impaired Loans/Leases:
Recorded Investment	16,903,023		16,903,023	14,276,241
Unpaid Principal Balance	17,703,023		17,703,023	14,826,235
Related Allowance	2,155,993		2,155,993	1,247,377
Average Recorded Investment	15,352,401	10,970,940	15,636,051
Interest Income Recognized	83,113	0	151,558
Interest Income Recognized for Cash Payments Received	83,113	0	151,558
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	585,845	1,052,176
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	90,000		90,000	66,675
Impaired Loans/Leases with Specific Allowance Recorded - Average Recorded Investment	118,275	746,288
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	687,508		687,508	1,306,663
Unpaid Principal Balance	687,508		687,508	1,306,663
Related Allowance	90,000		90,000	66,675
Average Recorded Investment	704,120	1,798,464	904,967
Interest Income Recognized	0	0
Interest Income Recognized for Cash Payments Received	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	734,485	958,303
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized	1,673
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received	1,673
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	117,877		117,877	55,884
Impaired Loans/Leases with Specific Allowance Recorded - Average Recorded Investment	462,406	140,332
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	1,191,136		1,191,136	1,133,474
Unpaid Principal Balance	1,191,136		1,191,136	1,207,087
Related Allowance	117,877		117,877	55,884
Average Recorded Investment	1,196,891	1,098,635	1,206,583
Interest Income Recognized	1,673	0	3,346
Interest Income Recognized for Cash Payments Received	1,673	0	3,346
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	974,591	668,265
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized	101	0
Impaired Loans/Leases with No Specific Allowance Recorded - Interest Income Recognized for Cash Payments Received	101	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	2,313		2,313	22,819
Impaired Loans/Leases with Specific Allowance Recorded - Average Recorded Investment	1,998	233,087
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	965,678		965,678	984,806
Unpaid Principal Balance	984,410		984,410	984,806
Related Allowance	2,313		2,313	22,819
Average Recorded Investment	976,589	901,352	974,235
Interest Income Recognized	101	0	124
Interest Income Recognized for Cash Payments Received	$ 101	$ 0	$ 124