Goodwill and Intangible Assets

9 Months Ended

Sep. 30, 2019

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

5. Goodwill and Intangible Assets

Goodwill was $69,952,000 and $12,354,000 as of September 30, 2019 and December 31, 2018, respectively.

Intangible assets consisted of the following (in thousands):

	Average Remaining	September 30,			December 31,
	Useful Life	2019			2018
Domain names	0 Months	$	1,268		$	1,268
Trademarks	0 Months		120			120
Software	5 Months		620			620
Capitalized learning content	25 Months		400			400
Trade names	32 Months		3,686			320
Developed technology	44 Months		24,527			5,320
Customer relationships	32 Months		15,923			2,910
Accumulated amortization			(11,399	)		(4,696	)
Total		$	35,145		$	6,262

Amortization expense for intangible assets was $2,855,000 and $673,000 for the three months ended September 30, 2019 and 2018, respectively, and $6,703,000 and $2,112,000 for the nine months ended September 30, 2019 and 2018, respectively. Amortization expense for capitalized learning content and developed technology is recorded within cost of revenue in the consolidated statements of operations.

Based on the recorded intangible assets at September 30, 2019, estimated amortization expense is expected to be as follows (in thousands):

	Amortization
Years Ending December 31,	Expense
Remainder of 2019	$	2,632
2020		10,322
2021		9,186
2022		7,936
2023		4,446
Thereafter		623
Total	$	35,145