Note 12 - Common Stock Offering and Balance Sheet Restructuring (Details) - USD ($)		1 Months Ended		3 Months Ended		12 Months Ended
	May. 13, 2015	Apr. 30, 2015	Jan. 31, 2015	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Note 12 - Common Stock Offering and Balance Sheet Restructuring (Details) [Line Items]
Repayments of Long-term Debt						$ 7,350,000	$ 2,125,000	$ 5,800,000
Debt Instrument, Interest Rate, Effective Percentage				2.60%		2.60%	2.50%
Gains (Losses) on Extinguishment of Debt				$ 209,416	$ (6,900,000)
Extinguishment of Debt, Amount					103,500,000
Common Stock Offering 1 [Member]
Note 12 - Common Stock Offering and Balance Sheet Restructuring (Details) [Line Items]
Proceeds from issuance of common stock, net of issuance costs, shares (in Shares)	3,680,000					3,680,000
Share Price (in Dollars per share)	$ 18.25
Proceeds from Issuance of Common Stock	$ 63,500,000					$ 63,484,123
Term Note [Member]
Note 12 - Common Stock Offering and Balance Sheet Restructuring (Details) [Line Items]
Repayments of Long-term Debt		$ 2,350,000	$ 2,350,000		$ 15,300,000
Debt Instrument, Interest Rate, Effective Percentage					3.27%
Series A Subordinated Notes [Member]
Note 12 - Common Stock Offering and Balance Sheet Restructuring (Details) [Line Items]
Repayments of Long-term Debt					$ 2,700,000
Debt Instrument, Interest Rate, Stated Percentage					6.00%
FHLB Advances and Wholesale Repurchase Agreements [Member]
Note 12 - Common Stock Offering and Balance Sheet Restructuring (Details) [Line Items]
Repayments of Long-term Debt					$ 85,500,000
Long-term Debt, Weighted Average Interest Rate					4.36%
Brokered CD's and Overnight FHLB Advances [Member]
Note 12 - Common Stock Offering and Balance Sheet Restructuring (Details) [Line Items]
Debt, Weighted Average Interest Rate					0.90%
Funded With the Proceeds from the Common Stock Issuance [Member]
Note 12 - Common Stock Offering and Balance Sheet Restructuring (Details) [Line Items]
Extinguishment of Debt, Amount					$ 63,500,000
Funded Through the Maturity of Low-yielding Securities [Member]
Note 12 - Common Stock Offering and Balance Sheet Restructuring (Details) [Line Items]
Extinguishment of Debt, Amount					27,700,000
Funded With Brokered CDs and Overnight FHLB Advances [Member]
Note 12 - Common Stock Offering and Balance Sheet Restructuring (Details) [Line Items]
Extinguishment of Debt, Amount					$ 12,300,000