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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Name:	us-gaap_GoodwillImpairmentLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Note 6 - Goodwill (Details Textual) $ in Thousands		3 Months Ended		12 Months Ended
Note 6 - Goodwill (Details Textual) $ in Thousands	Mar. 31, 2021 USD ($)	Mar. 31, 2023 USD ($)	Mar. 31, 2021 USD ($)	Jun. 30, 2023 USD ($)
Number of Reporting Units				6
Goodwill, Impairment Loss				$ (0)
Engineering Technologies Group [Member]
Goodwill, Impairment Loss	$ 7,600		$ 7,600	$ (0)
Procon Operating Units [Member]
Goodwill, Written off Related to Sale of Business Unit		$ 200