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Note 20 - Parent Company Only Financial Statements (Details) - Condensed Statements of Cash Flows (Parentheticals) - shares |  | 12 Months Ended
--- | --- | ---
May. 13, 2015 | Dec. 31, 2015 | Dec. 31, 2014
Common Stock Offering 1 [Member] |  |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |  |
Proceeds from issuance of common stock, net of issuance costs, shares | 3,680,000 | 3,680,000 |
Parent Company [Member] | Common Stock Offering 1 [Member] |  |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |  |
Proceeds from issuance of common stock, net of issuance costs, shares |  | 3,680,000 |
Parent Company [Member] | Series F Noncumulative Perpetual Preferred Stock [Member] |  |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |  |
Redemption of Series F Noncumulative Perpetual Preferred Stock, shares |  |  | 29,867

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