4. Balance Sheet Components

Goodwill

The change in the carrying amount of goodwill at September 30, 2019 and December 31, 2018 was as follows:


	September 30,
	2019		December 31,
	(unaudited)		2018
Beginning balance	$	—	$	5,210,821
Impairment		—		(5,210,821)
Ending balance	$	—	$	—

Intangible Assets

Intangible assets at September 30, 2019 and December 31, 2018 consisted of the following:


	September 30,
	2019		December 31,
	(unaudited)		2018
Developed technology	$	25,000,000	$	25,000,000
Accumulated developed technology amortization		(3,611,112)		(2,361,111)
Developed technology, net		21,388,888		22,638,889
In-process research and development		8,800,000		8,800,000
Impairment		(4,000,000)		—
In process research and development, net		4,800,000		8,800,000
Trademarks		300,000		300,000
Accumulated trademark amortization		(43,333)		(28,333)
Trademarks, net		256,667		271,667
Total intangible assets, net	$	26,445,555	$	31,710,556

In June 2019 the Company determined that in-process research and development was impaired and recorded an impairment loss of $4.0 million in the statements of operations. Amortization expense was $421,667 and $1,265,001 for the three and nine months ended September 30, 2019, respectively, and $421,667 and $1,265,001 for the three and nine months ended September 30, 2018, respectively.

The following table summarizes the Company’s estimated future amortization expense of intangible assets with finite lives as of September 30, 2019:


	Amounts
2019 (remaining)	$	421,667
2020		1,686,667
2021		1,686,667
2022		1,686,667
2023		1,686,667
2024		1,686,667
Thereafter		12,790,553
	$	21,645,555