Note 3 - Loans/Leases Receivable (Details) - Loans By Credit Quality Indicators (USD $)	Mar. 31, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	$ 1,121,578,680	$ 1,103,441,058
Commercial and Industrial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	419,982,030	407,294,743
Commercial and Industrial [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	12,464,206	11,355,713
Commercial and Industrial [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	9,904,239	13,037,673
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	442,350,475	431,688,129
Owner-Occupied Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	250,623,915	250,028,731
Owner-Occupied Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	10,356,128	8,318,232
Owner-Occupied Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	8,503,481	2,868,949
Owner-Occupied Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	269,483,524	261,215,912
Commercial Construction, Land Development, and Other Land [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	50,250,005	51,868,919
Commercial Construction, Land Development, and Other Land [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating		1,588,086
Commercial Construction, Land Development, and Other Land [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	4,944,020	4,387,897
Commercial Construction, Land Development, and Other Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	55,194,025	57,844,902
Non-Owner Occupied Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	327,819,856	326,168,882
Non-Owner Occupied Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	1,765,205	3,310,017
Non-Owner Occupied Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	24,965,595	23,213,216
Non-Owner Occupied Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	354,550,656	352,692,115
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	1,048,675,806	1,035,361,275
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	24,585,539	24,572,048
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	$ 48,317,335	$ 43,507,735