Note 15 - Common Stock (Details Textual) $ / shares in Units, $ in Millions |
12 Months Ended | ||||||
|---|---|---|---|---|---|---|---|
Nov. 16, 2016 |
Jan. 31, 2015
USD ($)
shares
|
Jul. 16, 2014
shares
|
Jun. 16, 2014 |
May 19, 2014
USD ($)
$ / shares
shares
|
Dec. 31, 2016 |
Dec. 31, 2015
shares
|
|
| Stockholders' Equity Note, Stock Split, Conversion Ratio | 2 | 3 | 2 | ||||
| Common Stock Dividends, Shares | 2 | ||||||
| Stock Issued During Period, Shares, New Issues | 1,051,000 | ||||||
| IPO [Member] | |||||||
| Stock Issued During Period, Shares, New Issues | 3,750,000 | ||||||
| Sale of Stock, Price Per Share | $ / shares | $ 15.167 | ||||||
| Proceeds from Issuance of Private Placement | $ | $ 52.1 | ||||||
| Metro Bancshares, Inc [Member] | |||||||
| Payments to Acquire Businesses, Gross | $ | $ 20.9 | ||||||
| Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | 1,273,184 | ||||||
| X | ||||||||||
- Definition Number of shares of equity interests issued or issuable to acquire entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Number of shares of common stock issued as dividends during the period. Excludes stock splits. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The cash inflow associated with the amount received from entity's raising of capital via private rather than public placement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction. No definition available.
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| X | ||||||||||
- Definition Number of new stock issued during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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