Note 8 - Goodwill (Details Textual) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Mar. 31, 2021	Mar. 31, 2021
Goodwill, Impairment Loss		$ 7.6
Engineering Technologies Group [Member]
Goodwill, Impairment Loss	$ 7.6	$ 7.6

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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