Note 7 - Goodwill (Details Textual) $ in Millions	3 Months Ended	6 Months Ended
Mar. 31, 2020 USD ($)	Mar. 31, 2020
Number of Reporting Units		2
COVID-19 Pandemic [Member] \| Telco [Member]
Goodwill, Impairment Loss	$ 4.8

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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