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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 |  |  |

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