Note 3 - Loans/Leases Receivable (Details) - Loans By Credit Quality Indicators (USD $)	Jun. 30, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	$ 1,163,870,062	$ 1,103,441,058
Commercial and Industrial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	444,280,023	407,294,743
Commercial and Industrial [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	22,616,136	11,355,713
Commercial and Industrial [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	13,598,162	13,037,673
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	480,494,321	431,688,129
Owner-Occupied Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	228,602,988	250,028,731
Owner-Occupied Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	10,214,621	8,318,232
Owner-Occupied Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	8,778,542	2,868,949
Owner-Occupied Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	247,596,151	261,215,912
Commercial Construction, Land Development, and Other Land [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	54,249,436	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	3,792,653	4,387,897
Commercial Construction, Land Development, and Other Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	58,042,089	57,844,902
Non-Owner Occupied Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	349,022,456	326,168,882
Non-Owner Occupied Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	1,475,286	3,310,017
Non-Owner Occupied Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	27,239,759	23,213,216
Non-Owner Occupied Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	377,737,501	352,692,115
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	1,076,154,903	1,035,361,275
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	34,306,043	24,572,048
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	$ 53,409,116	$ 43,507,735