The details of identifiable intangible assets as of December 31, 2020 and 2019 are shown below (in thousands except for lives):

Amortized Intangible Assets	Original Life (years)	Remaining Life (years)		Carrying Value December 31, 2019		Amortization			Carrying Value December 31, 2020
Customer Network (HGP)	12		2.0	$	92	$	(30	)	$	62
Trade Name (HGP)	14		4.0		642		(129	)		513
Customer Relationships (NLEX)	7.6		1.0		221		(110	)		111
Total					955		(269	)		686

Unamortized Intangible Assets
Trade Name (NLEX)	N/A	N/A			2,437		—			2,437
Total				$	3,392	$	(269	)	$	3,123


Amortized Intangible Assets	Original Life (years)	Remaining Life (years)		Carrying Value December 31, 2018		Amortization			Carrying Value December 31, 2019
Customer Network (HGP)	12		3.0	$	114	$	(22	)	$	92
Trade Name (HGP)	14		5.0		746		(104	)		642
Customer Relationships (NLEX)	7.6		2.0		330		(109	)		221
Total					1,190		(235	)		955

Unamortized Intangible Assets
Trade Name (NLEX)	N/A	N/A			2,437		—			2,437
Total				$	3,627	$	(235	)	$	3,392

Amortization expense during each of 2020 and 2019 was $0.3 million and $0.2 million, respectively. No significant residual value is estimated for these intangible assets.

The Company performed its annual impairment test for the year ended December 31, 2020, in the fourth quarter, and determined that no impairment charges were necessary.

The estimated amortization expense during future years is shown below (in thousands):

As part of its acquisitions, the Company recognized goodwill of $4.7 million related to HGP in 2012 and $3.5 million related to NLEX in 2014.

Goodwill consisted of the following at December 31, 2020 and 2019 (in thousands):

On September 13, 2019, the Company entered into an Amendment (the “Mann Amendment”) to the Employment Agreement (the “Mann Employment Agreement”) for Kenneth Mann, a named executive officer of the Company and the Senior Managing Director of Equity Partners. Pursuant to the terms of the Mann Amendment, Mr. Mann continued his employment with Equity Partners until December 31, 2019, after which time the Mann Employment Agreement and Mann Amendment terminated and Mr. Mann’s employment with Equity Partners ceased (the “Resignation Time”). As a result of the Mann Amendment, the Company recorded an impairment charge of $0.6 million at December 31, 2019 to reduce the carrying value of goodwill, which resulted from the acquisition of Equity Partners in 2011.

The Company performed its annual impairment test for the year ended December 31, 2020, in the fourth quarter, and determined that no additional impairment charges were necessary.