Note 4 - Loans/Leases Receivable (Details) - Impaired Loans/Leases (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Impaired Loans/Leases with No Specific Allowance Recorded:
Impaired loans/leases with no specific allowance recorded, recorded investment	$ 3,130,879	$ 6,757,674	$ 4,372,125
Impaired loans/leases with no specific allowance recorded, unpaid principal balance	3,434,385	7,057,203	5,320,511
Impaired loans/leases with no specific allowance recorded, average recorded investment	10,691,723	11,583,623	12,767,263
Impaired loans/leases with no specific allowance recorded, interest income recognized	55,825	74,982	20,833
Impaired loans/leases with no specific allowance recorded, interest income recognized for cash payments received	55,825	74,982	20,833
Impaired Loans/Leases with Specific Allowance Recorded:
Impaired loans/leases with specific allowance recorded, recorded investment	15,875,762	12,322,746	19,922,086
Impaired loans/leases with specific allowance recorded, unpaid principal balance	18,008,843	13,838,755	20,197,297
Impaired loans/leases, related allowance	5,244,673	5,008,822	4,587,769
Impaired loans/leases with specific allowance recorded, average recorded investment	9,684,123	11,252,892	14,210,538
Impaired loans/leases with specific allowance recorded, interest income recognized	21,368	92,374	314,088
Impaired loans/leases with specific allowance recorded, interest income recognized for cash payments received	21,368	92,374	314,088
Total Impaired Loans/Leases:
Impaired loans/leases, recorded investment	19,006,641	19,080,420	24,294,211
Impaired loans/leases, unpaid principal balance	21,443,228	20,895,958	25,517,808
Impaired loans/leases, related allowance	5,244,673	5,008,822	4,587,769
Impaired loans/leases, average recorded investment	20,375,846	22,836,515	26,977,801
Impaired loans/leases, interest income recognized	77,193	167,356	334,921
Impaired loans/leases, interest income recognized for cash payments received	77,193	167,356	334,921
Commercial and Industrial [Member]
Impaired Loans/Leases with No Specific Allowance Recorded:
Impaired loans/leases with no specific allowance recorded, recorded investment	246,308	492,622	438,355
Impaired loans/leases with no specific allowance recorded, unpaid principal balance	342,391	568,951	1,203,710
Impaired loans/leases with no specific allowance recorded, average recorded investment	525,543	747,134	757,286
Impaired loans/leases with no specific allowance recorded, interest income recognized	7,599	7,749	7,910
Impaired loans/leases with no specific allowance recorded, interest income recognized for cash payments received	7,599	7,749	7,910
Impaired Loans/Leases with Specific Allowance Recorded:
Impaired loans/leases with specific allowance recorded, recorded investment	7,033,401	1,269,228	568,597
Impaired loans/leases with specific allowance recorded, unpaid principal balance	8,190,495	1,956,755	590,849
Impaired loans/leases, related allowance	3,300,199	927,453	280,170
Impaired loans/leases with specific allowance recorded, average recorded investment	3,159,985	1,222,449	499,036
Impaired loans/leases with specific allowance recorded, interest income recognized	14,837	33,703
Impaired loans/leases with specific allowance recorded, interest income recognized for cash payments received	14,837	33,703
Total Impaired Loans/Leases:
Impaired loans/leases, recorded investment	7,279,709	1,761,850	1,006,952
Impaired loans/leases, unpaid principal balance	8,532,886	2,525,706	1,794,559
Impaired loans/leases, related allowance	3,300,199	927,453	280,170
Impaired loans/leases, average recorded investment	3,685,528	1,969,583	1,256,322
Impaired loans/leases, interest income recognized	22,436	41,452	7,910
Impaired loans/leases, interest income recognized for cash payments received	22,436	41,452	7,910
Owner-Occupied Commercial Real Estate [Member]
Impaired Loans/Leases with No Specific Allowance Recorded:
Impaired loans/leases with no specific allowance recorded, recorded investment	67,415	392,542	503,321
Impaired loans/leases with no specific allowance recorded, unpaid principal balance	163,638	392,542	503,321
Impaired loans/leases with no specific allowance recorded, average recorded investment	548,464	1,881,823	624,766
Impaired Loans/Leases with Specific Allowance Recorded:
Impaired loans/leases with specific allowance recorded, recorded investment	620,896	159,247
Impaired loans/leases with specific allowance recorded, unpaid principal balance	620,896	159,247
Impaired loans/leases, related allowance	4,462	67,498
Impaired loans/leases with specific allowance recorded, average recorded investment	316,743	87,035
Total Impaired Loans/Leases:
Impaired loans/leases, recorded investment	688,311	551,789	503,321
Impaired loans/leases, unpaid principal balance	784,534	551,789	503,321
Impaired loans/leases, related allowance	4,462	67,498
Impaired loans/leases, average recorded investment	865,207	1,968,858	624,766
Commercial Construction, Land Development, and Other Land [Member]
Impaired Loans/Leases with No Specific Allowance Recorded:
Impaired loans/leases with no specific allowance recorded, recorded investment	31,936	1,943,168	678,523
Impaired loans/leases with no specific allowance recorded, unpaid principal balance	143,136	2,054,368	678,523
Impaired loans/leases with no specific allowance recorded, average recorded investment	1,656,401	2,666,039	3,359,435
Impaired loans/leases with no specific allowance recorded, interest income recognized			3,549
Impaired loans/leases with no specific allowance recorded, interest income recognized for cash payments received			3,549
Impaired Loans/Leases with Specific Allowance Recorded:
Impaired loans/leases with specific allowance recorded, recorded investment	337,076	888,547	3,967,583
Impaired loans/leases with specific allowance recorded, unpaid principal balance	577,894	1,011,747	3,967,583
Impaired loans/leases, related allowance	12,087	503,825	1,105,795
Impaired loans/leases with specific allowance recorded, average recorded investment	528,564	1,137,489	2,311,845
Impaired loans/leases with specific allowance recorded, interest income recognized		10,862	5,749
Impaired loans/leases with specific allowance recorded, interest income recognized for cash payments received		10,862	5,749
Total Impaired Loans/Leases:
Impaired loans/leases, recorded investment	369,012	2,831,715	4,646,106
Impaired loans/leases, unpaid principal balance	721,030	3,066,115	4,646,106
Impaired loans/leases, related allowance	12,087	503,825	1,105,795
Impaired loans/leases, average recorded investment	2,184,965	3,803,528	5,671,280
Impaired loans/leases, interest income recognized		10,862	9,298
Impaired loans/leases, interest income recognized for cash payments received		10,862	9,298
Non-Owner Occupied Commercial Real Estate [Member]
Impaired Loans/Leases with No Specific Allowance Recorded:
Impaired loans/leases with no specific allowance recorded, recorded investment	491,717	1,790,279	495,702
Impaired loans/leases with no specific allowance recorded, unpaid principal balance	491,717	1,902,279	495,702
Impaired loans/leases with no specific allowance recorded, average recorded investment	4,925,681	3,869,493	5,288,820
Impaired loans/leases with no specific allowance recorded, interest income recognized	13,283	58,534	2,017
Impaired loans/leases with no specific allowance recorded, interest income recognized for cash payments received	13,283	58,534	2,017
Impaired Loans/Leases with Specific Allowance Recorded:
Impaired loans/leases with specific allowance recorded, recorded investment	5,884,343	7,783,132	14,738,717
Impaired loans/leases with specific allowance recorded, unpaid principal balance	6,583,934	8,488,414	14,991,676
Impaired loans/leases, related allowance	1,153,471	2,603,381	2,899,247
Impaired loans/leases with specific allowance recorded, average recorded investment	4,240,000	7,426,299	10,949,295
Impaired loans/leases with specific allowance recorded, interest income recognized		45,926	308,339
Impaired loans/leases with specific allowance recorded, interest income recognized for cash payments received		45,926	308,339
Total Impaired Loans/Leases:
Impaired loans/leases, recorded investment	6,376,060	9,573,411	15,234,419
Impaired loans/leases, unpaid principal balance	7,075,651	10,390,693	15,487,378
Impaired loans/leases, related allowance	1,153,471	2,603,381	2,899,247
Impaired loans/leases, average recorded investment	9,165,681	11,295,792	16,238,115
Impaired loans/leases, interest income recognized	13,283	104,460	310,356
Impaired loans/leases, interest income recognized for cash payments received	13,283	104,460	310,356
Finance Leases Portfolio Segment [Member]
Impaired Loans/Leases with No Specific Allowance Recorded:
Impaired loans/leases with no specific allowance recorded, recorded investment	561,414	557,469	777,645
Impaired loans/leases with no specific allowance recorded, unpaid principal balance	561,414	557,469	777,645
Impaired loans/leases with no specific allowance recorded, average recorded investment	867,657	802,825	871,076
Impaired loans/leases with no specific allowance recorded, interest income recognized	31,911
Impaired loans/leases with no specific allowance recorded, interest income recognized for cash payments received	31,911
Impaired Loans/Leases with Specific Allowance Recorded:
Impaired loans/leases with specific allowance recorded, recorded investment	777,858	336,989	221,157
Impaired loans/leases with specific allowance recorded, unpaid principal balance	777,858	336,989	221,157
Impaired loans/leases, related allowance	356,996	192,847	125,000
Impaired loans/leases with specific allowance recorded, average recorded investment	514,144	97,846	90,610
Total Impaired Loans/Leases:
Impaired loans/leases, recorded investment	1,339,272	894,458	998,802
Impaired loans/leases, unpaid principal balance	1,339,272	894,458	998,802
Impaired loans/leases, related allowance	356,996	192,847	125,000
Impaired loans/leases, average recorded investment	1,381,801	900,671	961,686
Impaired loans/leases, interest income recognized	31,911
Impaired loans/leases, interest income recognized for cash payments received	31,911
Residential Portfolio Segment [Member]
Impaired Loans/Leases with No Specific Allowance Recorded:
Impaired loans/leases with no specific allowance recorded, recorded investment	1,060,770	1,071,927	944,211
Impaired loans/leases with no specific allowance recorded, unpaid principal balance	1,060,770	1,071,927	1,127,242
Impaired loans/leases with no specific allowance recorded, average recorded investment	1,269,213	1,010,027	1,050,160
Impaired loans/leases with no specific allowance recorded, interest income recognized	3,032	4,235	6,728
Impaired loans/leases with no specific allowance recorded, interest income recognized for cash payments received	3,032	4,235	6,728
Impaired Loans/Leases with Specific Allowance Recorded:
Impaired loans/leases with specific allowance recorded, recorded investment	727,959	1,044,820	273,045
Impaired loans/leases with specific allowance recorded, unpaid principal balance	763,537	1,044,820	273,045
Impaired loans/leases, related allowance	151,663	246,266	105,565
Impaired loans/leases with specific allowance recorded, average recorded investment	538,678	641,217	258,677
Impaired loans/leases with specific allowance recorded, interest income recognized	2,967	1,883
Impaired loans/leases with specific allowance recorded, interest income recognized for cash payments received	2,967	1,883
Total Impaired Loans/Leases:
Impaired loans/leases, recorded investment	1,788,729	2,116,747	1,217,256
Impaired loans/leases, unpaid principal balance	1,824,307	2,116,747	1,400,287
Impaired loans/leases, related allowance	151,663	246,266	105,565
Impaired loans/leases, average recorded investment	1,807,891	1,651,244	1,308,837
Impaired loans/leases, interest income recognized	5,999	6,118	6,728
Impaired loans/leases, interest income recognized for cash payments received	5,999	6,118	6,728
Consumer Portfolio Segment [Member]
Impaired Loans/Leases with No Specific Allowance Recorded:
Impaired loans/leases with no specific allowance recorded, recorded investment	671,319	509,667	534,368
Impaired loans/leases with no specific allowance recorded, unpaid principal balance	671,319	509,667	534,368
Impaired loans/leases with no specific allowance recorded, average recorded investment	898,764	606,282	815,720
Impaired loans/leases with no specific allowance recorded, interest income recognized		4,464	629
Impaired loans/leases with no specific allowance recorded, interest income recognized for cash payments received		4,464	629
Impaired Loans/Leases with Specific Allowance Recorded:
Impaired loans/leases with specific allowance recorded, recorded investment	494,229	840,783	152,987
Impaired loans/leases with specific allowance recorded, unpaid principal balance	494,229	840,783	152,987
Impaired loans/leases, related allowance	265,795	467,552	71,992
Impaired loans/leases with specific allowance recorded, average recorded investment	386,009	640,557	101,075
Impaired loans/leases with specific allowance recorded, interest income recognized	3,564
Impaired loans/leases with specific allowance recorded, interest income recognized for cash payments received	3,564
Total Impaired Loans/Leases:
Impaired loans/leases, recorded investment	1,165,548	1,350,450	687,355
Impaired loans/leases, unpaid principal balance	1,165,548	1,350,450	687,355
Impaired loans/leases, related allowance	265,795	467,552	71,992
Impaired loans/leases, average recorded investment	1,284,773	1,246,839	916,795
Impaired loans/leases, interest income recognized	3,564	4,464	629
Impaired loans/leases, interest income recognized for cash payments received	$ 3,564	$ 4,464	$ 629