Goodwill and Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2018

Goodwill And Intangible Assets Disclosure [Abstract]

Summary of Intangible Assets

Intangible assets consisted of the following (in thousands):

	AverageRemaining	September 30,			December 31,
	Useful Life	2018			2017
Domain names	8 Months	$	1,268		$	1,268
Trademarks	59 Months		120			120
Software	10 Months		620			620
Capitalized learning content	37 Months		400			400
Trade names	26 Months		320			320
Developed technology	38 Months		5,320			5,320
Customer relationships	26 Months		2,910			2,910
Accumulated amortization			(4,022	)		(1,910	)
Total		$	6,936		$	9,048

Estimated Amortization Expense

Based on the recorded intangible assets at September 30, 2018, estimated amortization expense is expected to be as follows (in thousands):

	Amortization
Years Ending December 31,	Expense
Remainder of 2018	$	674
2019		2,626
2020		2,386
2021		1,250
2022		—
Total	$	6,936