Note 4 - Loans/Leases Receivable (Details) - Additional Information on Impaired Loans (USD $)	Jun. 30, 2013	Dec. 31, 2012
Impaired Loans/Leases with No Specific Allowance Recorded:
Impaired loans with no related allowance recorded investment	$ 7,592,244	$ 4,372,125
Impaired loans with no related allowance unpaid principal balance	9,722,723	5,320,511
Impaired Loans/Leases with Specific Allowance Recorded:
Impaired loans with related allowance recorded investment	17,902,183	19,922,086
Impaired loans with related allowance unpaid principal balance	18,164,961	20,197,297
Impaired loans related allowance	5,585,124	4,587,769
Total Impaired Loans/Leases:
Impaired loans recorded investment	25,494,427	24,294,211
Impaired loans unpaid principal balance	27,887,684	25,517,808
Impaired loans related allowance	5,585,124	4,587,769
Commercial and Industrial [Member]
Impaired Loans/Leases with No Specific Allowance Recorded:
Impaired loans with no related allowance recorded investment	678,239	438,355
Impaired loans with no related allowance unpaid principal balance	1,149,252	1,203,710
Impaired Loans/Leases with Specific Allowance Recorded:
Impaired loans with related allowance recorded investment	2,229,181	568,597
Impaired loans with related allowance unpaid principal balance	2,238,999	590,849
Impaired loans related allowance	1,039,328	280,170
Total Impaired Loans/Leases:
Impaired loans recorded investment	2,907,420	1,006,952
Impaired loans unpaid principal balance	3,388,251	1,794,559
Impaired loans related allowance	1,039,328	280,170
Owner-occupied commercial real estate [Member]
Impaired Loans/Leases with No Specific Allowance Recorded:
Impaired loans with no related allowance recorded investment	3,554,904	503,321
Impaired loans with no related allowance unpaid principal balance	4,934,815	503,321
Impaired Loans/Leases with Specific Allowance Recorded:
Impaired loans with related allowance recorded investment	980,236
Impaired loans with related allowance unpaid principal balance	980,236
Impaired loans related allowance	400,000
Total Impaired Loans/Leases:
Impaired loans recorded investment	4,535,140	503,321
Impaired loans unpaid principal balance	5,915,051	503,321
Impaired loans related allowance	400,000
Commercial construction, land development, and other land [Member]
Impaired Loans/Leases with No Specific Allowance Recorded:
Impaired loans with no related allowance recorded investment	300,000	678,523
Impaired loans with no related allowance unpaid principal balance	300,000	678,523
Impaired Loans/Leases with Specific Allowance Recorded:
Impaired loans with related allowance recorded investment	3,652,434	3,967,583
Impaired loans with related allowance unpaid principal balance	3,652,434	3,967,583
Impaired loans related allowance	1,428,466	1,105,795
Total Impaired Loans/Leases:
Impaired loans recorded investment	3,952,434	4,646,106
Impaired loans unpaid principal balance	3,952,434	4,646,106
Impaired loans related allowance	1,428,466	1,105,795
Other commercial real estate [Member]
Impaired Loans/Leases with No Specific Allowance Recorded:
Impaired loans with no related allowance recorded investment	224,719	495,702
Impaired loans with no related allowance unpaid principal balance	224,719	495,702
Impaired Loans/Leases with Specific Allowance Recorded:
Impaired loans with related allowance recorded investment	10,160,743	14,738,717
Impaired loans with related allowance unpaid principal balance	10,413,703	14,991,676
Impaired loans related allowance	2,475,091	2,899,247
Total Impaired Loans/Leases:
Impaired loans recorded investment	10,385,462	15,234,419
Impaired loans unpaid principal balance	10,638,422	15,487,378
Impaired loans related allowance	2,475,091	2,899,247
Leases receivable [Member]
Impaired Loans/Leases with No Specific Allowance Recorded:
Impaired loans with no related allowance recorded investment	542,497	777,645
Impaired loans with no related allowance unpaid principal balance	542,497	777,645
Impaired Loans/Leases with Specific Allowance Recorded:
Impaired loans with related allowance recorded investment	158,077	221,157
Impaired loans with related allowance unpaid principal balance	158,077	221,157
Impaired loans related allowance	116,077	125,000
Total Impaired Loans/Leases:
Impaired loans recorded investment	700,574	998,802
Impaired loans unpaid principal balance	700,574	998,802
Impaired loans related allowance	116,077	125,000
Residential Real Estate [Member]
Impaired Loans/Leases with No Specific Allowance Recorded:
Impaired loans with no related allowance recorded investment	1,271,905	944,211
Impaired loans with no related allowance unpaid principal balance	1,538,919	1,127,242
Impaired Loans/Leases with Specific Allowance Recorded:
Impaired loans with related allowance recorded investment	300,615	273,045
Impaired loans with related allowance unpaid principal balance	300,615	273,045
Impaired loans related allowance	90,235	105,565
Total Impaired Loans/Leases:
Impaired loans recorded investment	1,572,520	1,217,256
Impaired loans unpaid principal balance	1,839,534	1,400,287
Impaired loans related allowance	90,235	105,565
Installment and Other Consumer [Member]
Impaired Loans/Leases with No Specific Allowance Recorded:
Impaired loans with no related allowance recorded investment	1,019,980	534,368
Impaired loans with no related allowance unpaid principal balance	1,032,521	534,368
Impaired Loans/Leases with Specific Allowance Recorded:
Impaired loans with related allowance recorded investment	420,897	152,987
Impaired loans with related allowance unpaid principal balance	420,897	152,987
Impaired loans related allowance	35,927	71,992
Total Impaired Loans/Leases:
Impaired loans recorded investment	1,440,877	687,355
Impaired loans unpaid principal balance	1,453,418	687,355
Impaired loans related allowance	$ 35,927	$ 71,992