Note 3 - Loans/Leases Receivable (Details) - Loans By Credit Quality Indicators (USD $)	Sep. 30, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	$ 1,177,475,092	$ 1,103,441,058
Commercial and Industrial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	448,093,142	407,294,743
Commercial and Industrial [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	15,306,200	11,355,713
Commercial and Industrial [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	16,347,717	13,037,673
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	479,747,059	431,688,129
Owner-Occupied Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	241,429,419	250,028,731
Owner-Occupied Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	6,598,947	8,318,232
Owner-Occupied Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	3,047,994	2,868,949
Owner-Occupied Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	251,076,360	261,215,912
Commercial Construction, Land Development, and Other Land [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	66,448,462	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	3,407,562	4,387,897
Commercial Construction, Land Development, and Other Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	69,856,024	57,844,902
Non-Owner Occupied Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	349,173,522	326,168,882
Non-Owner Occupied Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	2,058,884	3,310,017
Non-Owner Occupied Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	25,563,243	23,213,216
Non-Owner Occupied Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	376,795,649	352,692,115
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	1,105,144,545	1,035,361,275
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	23,964,031	24,572,048
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Internally assigned risk rating	$ 48,366,516	$ 43,507,735