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Note 13 - Shareholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
	Oct. 15, 2010	Dec. 31, 2016	Jul. 26, 2016	Dec. 31, 2015	Oct. 14, 2010
Stock Issued During Period, Shares, Acquisitions	3,360,000
Stock Issued During Period at Purchase Price Per Share, Acquisition	$ 15
Stock Issued During Period, Value, Acquisitions	$ 50.4
Percentage of Shares Sold of Common Stock Issued and Outstanding	87.60%
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01		$ 0.01	$ 2
Common Stock, Shares Authorized	100,000,000	100,000,000		100,000,000
Stock Repurchase Program, Number of Shares Authorized to be Repurchased			500,000
Treasury Stock, Shares, Acquired		72,471
Treasury Stock Acquired, Average Cost Per Share		$ 14.04

X

- Definition

The percentage represent current issued and outstanding common stock.

+ References

No definition available.

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Common stock at a purchase price per share for aggregate purchase price

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- Definition

Face amount or stated value per share of common stock.

+ 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(29))
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- Definition

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Number of shares of stock issued during the period pursuant to acquisitions.

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Value of stock issued pursuant to acquisitions during the period.

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- Definition

The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

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Total cost of shares repurchased divided by the total number of shares repurchased.

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Number of shares that have been repurchased during the period and are being held in treasury.

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