Note 1 - Nature of Operations, Basis of Presentation and Company Conditions - Schedule of Goodwill (Details) - USD ($) $ in Thousands	6 Months Ended	9 Months Ended
Jun. 30, 2022	Sep. 30, 2022
Goodwill - Balance	$ 100,899	$ 100,899
Acquisition of CFS		1,521
IMMCO purchase price allocation adjustment		537
September 30, 2022 - impairment	0	(95,951)
Goodwill - Balance		7,006
Renewables [Member]
Acquisition of CFS		0
IMMCO purchase price allocation adjustment		0
September 30, 2022 - impairment		0
Goodwill - Balance		7,006
Electric Power [Member]
IMMCO purchase price allocation adjustment		0
September 30, 2022 - impairment		(70,151)
Goodwill - Balance		0
Telecommunications [Member]
IMMCO purchase price allocation adjustment		537
September 30, 2022 - impairment		(25,800)
Goodwill - Balance		0
Electric Power [Member]
Goodwill - Balance	70,151	70,151
Acquisition of CFS		0
Telecommunications [Member]
Goodwill - Balance	23,742	23,742
Acquisition of CFS		1,521
Renewables [Member]
Goodwill - Balance	$ 7,006	$ 7,006

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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