Note 7 - Goodwill (Details Textual) - USD ($) $ in Thousands	6 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Goodwill, Useful Life for Tax Purposes		15 years
Goodwill, Impairment Loss	$ 0	$ 0

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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