Note 9 - Shareholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Treasury Stock, Value, Acquired, Cost Method	$ 753	$ 1,044
Share Repurchase Program [Member]
Treasury Stock, Shares, Acquired	157,255
Treasury Stock Acquired, Average Cost Per Share	$ 4.23
Treasury Stock, Value, Acquired, Cost Method	$ 700

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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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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