Note 4 - Share Repurchase Program (Details Textual) - USD ($) $ in Thousands	12 Months Ended	14 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Nov. 01, 2018
Treasury Stock, Shares, Acquired	267,300		372,974
Treasury Stock, Value, Acquired, Cost Method	$ 1,957	$ 742	$ 2,699
Maximum [Member]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased				2,500,000

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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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