On December 18, 2019, the Company entered into a merger agreement with TiVo in an all-stock merger of equals transaction. See “Note 1 – The Company and Basis of Presentation.”

The Company's reporting units include the Product Licensing segment and the Semiconductor and IP Licensing segment. Of the carrying value of goodwill, approximately $378.1 million was allocated to the Product Licensing segment and approximately $7.7 million was allocated to the Semiconductor and IP Licensing segment as of March 31, 2020 and December 31, 2019.

During the first quarter of 2020, the COVID-19 pandemic rapidly spread globally and has created unprecedented disruptions in economic activity and financial markets. Due to resulting changes in macroeconomic conditions, industry outlook, and a meaningful decline in the Company’s share price, indicators of potential goodwill impairment were identified. The Company proceeded with a quantitative interim goodwill impairment test as of March 31, 2020. Based on the quantitative assessment, the Company concluded that the fair value of the reporting units exceeded the carrying amount for both Product Licensing and Semiconductor and IP Licensing. As a result, no goodwill impairment charges were recognized in the three months ended March 31, 2020.

	Average	March 31, 2020							December 31, 2019
	Life (Years)	Gross Assets		Accumulated Amortization			Net		Gross Assets		Accumulated Amortization			Net
Acquired patents / core technology	3-15	$	151,184	$	(137,086	)	$	14,098	$	151,184	$	(135,952	)	$	15,232
Existing technology	5-10		206,878		(139,590	)		67,288		206,878		(130,890	)		75,988
Customer contracts and related relationships	3-9		291,769		(186,173	)		105,596		291,769		(174,741	)		117,028
Trademarks/trade name	4-10		40,083		(17,299	)		22,784		40,083		(16,056	)		24,027
Non-competition agreements	1		2,231		(2,231	)		—		2,231		(2,231	)		—
Total intangible assets		$	692,145	$	(482,379	)	$	209,766	$	692,145	$	(459,870	)	$	232,275

Amortization expense for the three months ended March 31, 2020 and 2019 amounted to $22.5 million and $25.5 million, respectively.

As of March 31, 2020, the estimated future amortization expense of total intangible assets was as follows (in thousands):