Note 5 - Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Schedule of Goodwill [Table Text Block]

(In thousands)	Electric Power			Telecommunications			Renewables		Other		Total
Balance, December 31, 2021	$	70,151		$	23,742		$	7,006	$	—	$	100,899
Acquisition of Coax Fiber Solutions		—			1,530			—		—		1,530
Working capital adjustment		—			528			—		—		528
Impairment		(70,151	)		(25,800	)		—		—		(95,951	)
Balance, December 31, 2022	$	—		$	—		$	7,006	$	—	$	7,006

Schedule of Intangible Assets and Goodwill [Table Text Block]

Finite-lived intangible assets (in thousands)			(In years)		December 31, 2022										December 31, 2021
	Estimated Useful Life (in years)		Weighted average remaining amortization period		Gross Carrying Amount		Accumulated Amortization			Impairment			Identifiable Intangible Assets, less Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization			Identifiable Intangible Assets, less Accumulated Amortization
Electric Power
Order backlog		1		—		9,186		(9,186	)		—			—		9,186		(1,148	)		8,038
Customer relationships - Front Line		15		13.89		84,012		(6,301	)		—			77,711		84,012		(700	)		83,312
Total Electric Power						93,198		(15,487	)		—			77,711		93,198		(1,848	)		91,350
Telecommunications
Customer Relationships - GTS		10		8.29	$	16,075	$	(2,760	)	$	—		$	13,315	$	16,075	$	(1,152	)	$	14,923
Customer Relationships - IMMCO		10		8.58		3,800		(547	)		—			3,253		3,800		(158	)		3,642
Customer Relationships - Full Moon		10		8.82		210		(25	)		—			185		210		(4	)		206
Technology - Know How		4		2.58		1,459		(519	)		—			940		1,459		(152	)		1,307
Software - IMMCO		3		1.23		1,126		(519	)		—			607		547		(93	)		454
Non-compete agreements - GTS		5		3.29		385		(132	)		—			253		385		(55	)		330
Total Telecommunications						23,055		(4,502	)		—			18,553		22,476		(1,614	)		20,862
Renewables
Customer Relationships		5		—		—		—			(4,323	)		—		8,647		(3,027	)		5,620
Trade name - Reach Construction Group		1		—		1,878		(1,878	)		—			—		1,878		(1,878	)		—
Non-compete agreements		5		2.25		3,212		(1,767	)		—			1,445		3,212		(1,124	)		2,088
Total Renewables						5,090		(3,645	)		(4,323	)		1,445		13,737		(6,029	)		7,708
Other category
Computer software		3		—		726		(726	)		—			—		713		(713	)		—
Product certifications		3		—		—		—			—			—		36		(36	)		—
Total Other category						726		(726	)		—			—		749		(749	)		—
Total identifiable finite-lived other intangible assets						122,069		(24,360	)		(4,323	)		97,709		130,160		(10,240	)		119,920
Identifiable indefinite-lived other intangible assets
Electric Power
Trade name - Front Line						15,027		—			(7,383	)		7,644		15,027		—			15,027
Telecommunications
Trade name - GTS						6,388		—			(1,746	)		4,642		6,388		—			6,388
Trade name - IMMCO						1,162		—			(182	)		980		1,162		—			1,162
Trade name - Full Moon						159		—			—			159		159		—			159
Total Telecommunications						7,709		—			(1,928	)		5,781		7,709		—			7,709
Total identifiable indefinite-lived other intangible assets						22,736		—			(9,311	)		13,425		22,736		—			22,736
Total identifiable other intangible assets					$	144,805	$	(24,360	)	$	(13,634	)	$	111,134	$	152,896	$	(10,240	)	$	142,656

Schedule of Finite-Lived Intangible Assets, Amortization Expense [Table Text Block]

	For the Years Ended December 31,
(In thousands)	2022		2021
Trade name	$	—	$	469
Customer relationships		8,915		3,744
Technology - Know How		368		152
Computer software		427		96
Noncompete agreements		720		697
Order Backlog		8,038		1,148
Intangibles held by discontinued operations		—		1,396
Total amortization	$	18,468	$	7,702

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

	For the Years Ended December 31,
											2028 and
(In thousands)	2023		2024		2025		2026		2027		thereafter		Totals
Customer relationships	$	7,609	$	7,609	$	7,609	$	7,609	$	7,609	$	56,419	$	94,464
Technology-Know How		365		365		210		—		—		—		940
Computer software		466		141		—		—		—		—		607
Non-compete agreements		719		719		238		22		—		—		1,698
Total amortization	$	9,159	$	8,834	$	8,057	$	7,631	$	7,609	$	56,419	$	97,709