Note 6 - Goodwill and Intangible Assets (Details Textual) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Goodwill, Ending Balance	$ 1,943		$ 1,943	$ 16,768
Goodwill, Impairment Loss	$ 0	$ 14,740	14,740	2,797
Amortization of Intangible Assets, Total			$ 2,537	$ 2,850	$ 3,080

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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