Note 9 - Segment Reporting - Segment Activity (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022		Mar. 31, 2021		Dec. 31, 2021
Revenues from external customers	$ 70,254		$ 5,561
Depreciation, Depletion and Amortization, Total	8,690	[1]	1,747	[2]
Interest expense	8,039		734
Income (loss) from operations	(1,788)		(15,622)
Expenditures for long-lived assets	1,402	[3]	3,638	[4]
Segment assets	411,415				$ 412,339
Goodwill	102,349				100,899
Other intangible assets, net	138,207				142,656
Electric Power Segment [Member]
Revenues from external customers	39,695		3,189
Depreciation, Depletion and Amortization, Total	6,975	[1]	217	[2]
Interest expense	4,071		1
Income (loss) from operations	(711)		(4,264)
Expenditures for long-lived assets	943	[3]	2,920	[4]
Segment assets	277,615				273,726
Goodwill	70,151				70,151
Other intangible assets, net	102,680				106,377
Telecommunications Segment [Member]
Revenues from external customers	16,095		0
Depreciation, Depletion and Amortization, Total	1,091	[1]	0	[2]
Interest expense	37		0
Income (loss) from operations	477		0
Expenditures for long-lived assets	423	[3]	0	[4]
Segment assets	86,058				80,800
Goodwill	25,192				23,742
Other intangible assets, net	28,412				28,571
Renewables Segment [Member]
Revenues from external customers	14,464		2,372
Depreciation, Depletion and Amortization, Total	608	[1]	1,089	[2]
Interest expense	2		15
Income (loss) from operations	428		(5,326)
Expenditures for long-lived assets	0	[3]	0	[4]
Segment assets	30,286				28,324
Goodwill	7,006				7,006
Other intangible assets, net	7,115				7,708
Other Segments [Member]
Revenues from external customers	0		0
Depreciation, Depletion and Amortization, Total	16	[1]	441	[2]
Interest expense	3,929		718
Income (loss) from operations	(1,982)		(6,032)
Expenditures for long-lived assets	36	[3]	$ 718	[4]
Segment assets	17,456				29,489
Goodwill	0				0
Other intangible assets, net	$ 0				$ 0

[1] For the Electric Power segment and the Telecommunications segment, depreciation and amortization includes $3.2 million and $0.2 million respectively, which was included in cost of revenues in the Condensed Consolidated Statements of Operations.

[2] For the Electric Power segment, depreciation and amortization includes $0.2 million, which was included in cost of revenues in the Condensed Consolidated Statements of Operations. Other category includes $432 thousand of depreciation and amortization from discontinued operations.

[3] Includes purchases of property, plant and equipment and other intangible assets. The Other category includes expenditures for discontinued operations of $10 thousand.

[4] Includes purchases of property, plant and equipment and other intangible assets. The Other category includes expenditures for discontinued operations of $705 thousand.