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Note 11 - Other Borrowings and Subordinated Debentures - Long-term Debt (Details) (Parentheticals) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2017 | Dec. 31, 2016
Federal Home Loan Bank Advances [Member] | Minimum [Member] |  |
Fixed rate | 1.15% | 1.15%
Federal Home Loan Bank Advances [Member] | Maximum [Member] |  |
Fixed rate | 7.37% | 7.37%
Note Payable Due 10/15/2020 [Member] |  |
Fixed rate | 3.85% | 3.85%
Trust Preferred Securities Due 12/30/2033 Floating Rate of 2.8% Above Three Month LIBOR 1 [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |
Debt Instrument, Basis Spread on Variable Rate | 2.80% | 2.80%
Trust Preferred Securities Due 6/30/2035 [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |
Debt Instrument, Basis Spread on Variable Rate | 1.75% | 1.75%
Trust Preferred Securities Due 9/15/2037 [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |
Debt Instrument, Basis Spread on Variable Rate | 1.37% | 1.37%
Trust Preferred Securities Due 12/3/2033 [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |
Debt Instrument, Basis Spread on Variable Rate | 2.88% | 2.88%
Trust Preferred Securities Due 12/13/2034 [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |
Debt Instrument, Basis Spread on Variable Rate | 2.00% | 2.00%
Trust Preferred Securities, Due 6/6/2037 [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |
Debt Instrument, Basis Spread on Variable Rate | 1.57% | 1.57%
Trust Preferred Securities, Due 12/15/2035 [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |
Debt Instrument, Basis Spread on Variable Rate | 1.45% |

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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