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Note 20 - Parent Company Only Financial Statements - Condensed Statements of Cash Flows (Details) (Parentheticals) - shares | 3 Months Ended | 12 Months Ended
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Jun. 30, 2016 | Dec. 31, 2016 | Dec. 31, 2015
Proceeds from issuance of common stock, net of issuance costs, shares (in shares) | 1,215,000 |  |
Common Stock Offering 1 [Member] | Parent Company [Member] |  |  |
Proceeds from issuance of common stock, net of issuance costs, shares (in shares) |  |  | 3,680,000
Common Stock Offering 2 [Member] | Parent Company [Member] |  |  |
Proceeds from issuance of common stock, net of issuance costs, shares (in shares) |  | 1,215,000 |

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