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Note 2 - Share Repurchase Program (Details Textual) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Feb. 06, 2019	Dec. 31, 2018	Nov. 01, 2018
Treasury Stock, Shares, Acquired		105,674
Treasury Stock, Value, Acquired, Cost Method		$ 742
Subsequent Event [Member]
Treasury Stock, Shares, Acquired	267,100
Treasury Stock, Acquired, Aggregate Number of Shares	372,774
Treasury Stock, Acquired, Aggregate Value	$ 2,697
Maximum [Member]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased			2,500,000

X

- Definition

The aggregate number of treasury shares acquired by the company.

+ References

No definition available.

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- Definition

The aggregate value of treasury stock acquired by the company.

+ References

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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.

+ References

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
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-Paragraph 1
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- Definition

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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