GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 31, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

Changes in the carrying amount of goodwill consisted of the following:

	December 31, 2024
	Industrial Operations		Energy Operations		Manufacturing Operations		Total
	(In thousands)
Beginning balance	$	7,541	$	1,449	$	—	$	8,990
Acquisition of business	—		—		20,628		20,628
Effect of foreign currency translation	—		—		(279)		(279)
Impairment losses	—		—		—		—
Ending balance	$	7,541	$	1,449	$	20,349	$	29,339

	December 31, 2023
	Industrial Operations		Energy Operations		Total
	(In thousands)
Beginning balance	$	7,541	$	—	$	7,541
Acquisition of business	—		1,449		1,449
Impairment losses	—		—		—
Ending balance	$	7,541	$	1,449	$	8,990

Schedule of Finite-Lived Intangible Assets

Other intangible assets, net consisted of the following:

	December 31, 2024
	Weighted Average Amortization Period	Gross Carrying Amount		Accumulated Amortization		Net Book Value
		(In thousands)
Patents:
Intellectual property operations	6 years	$	351,403	$	(332,211)	$	19,192
Industrial operations	7 years	3,400		(1,568)		1,832
Total patents		354,803		(333,779)		21,024
Customer relationships:
Industrial operations	7 years	5,300		(2,446)		2,854
Manufacturing operations	15 years	20,200		(269)		19,931
Total customer relationships		25,500		(2,715)		22,785
Trade name and trademarks
Industrial operations	7 years	3,430		(1,583)		1,847
Manufacturing operations	10 years	400		(8)		392
Manufacturing operations	Indefinite	8,009		—		8,009
Total trade name and trademarks		11,839		(1,591)		10,248
Developed technology - manufacturing operations	10 years	1,000		(20)		980
Favorable leases - manufacturing operations	1.9 years	704		(312)		392
Total		$	393,846	$	(338,417)	$	55,429

	December 31, 2023
	Weighted Average Amortization Period	Gross Carrying Amount		Accumulated Amortization		Net Book Value
		(In thousands)
Patents:
Intellectual property operations	6 years	$	341,403	$	(316,114)	$	25,289
Industrial operations	7 years	3,400		(1,083)		2,317
Total patents		344,803		(317,197)		27,606
Customer relationships - industrial operations	7 years	5,300		(1,689)		3,611
Trade name and trademarks - industrial operations	7 years	3,430		(1,091)		2,339
Total		$	353,533	$	(319,977)	$	33,556

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

The following table presents the scheduled annual aggregate amortization expense (in thousands):

Years Ending December 31,
2025	$	20,108
2026	5,796
2027	3,356
2028	2,957
2029	1,623
Thereafter	13,580
Total	$	47,420