Intangible assets consist of the following (in thousands):


			Successor							Predecessor
			September 30, 2021							December 31, 2020
	Estimated		Gross		Accumulated			Net		Gross		Accumulated			Net
	Useful Lives		Amount		Amortization			Balance		Amount		Amortization			Balance
Trade Names		10	$	4,166	$	(263	)	$	3,903	$	4,744	$	(4,263	)	$	481
Patents		10		2,120		(141	)		1,979		-		-			-
Customer Relationships		17		-		-			-		14,592		(10,077	)		4,515
Non-Compete Agreements		3		-		-			-		3,478		(3,478	)		-
Total			$	6,286	$	(404	)	$	5,882	$	22,814	$	(17,818	)	$	4,996

Amortization expense for the Successor Quarter and Prior Predecessor Quarter was $0.1 million and $0.5 million, respectively. For the Successor Period, Current Predecessor Period and Prior Predecessor Period amortization expense was $0.5 million, $0.1 million and $0.9 million, respectively. Based on the carrying values of intangible assets of September 30, 2021, amortization expense for the next five years (2021 through 2025) is estimated to be $0.2 million for the remainder of 2021 and $0.6 million for the years 2022 through 2025.