Goodwill and Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2018

Goodwill And Intangible Assets Disclosure [Abstract]

Summary of Intangible Assets

Intangible assets consisted of the following (in thousands):

	AverageRemaining	March 31,			December 31,
	Useful Life	2018			2017
Domain names	10 Months	$	1,268		$	1,268
Trademarks	1 Months		120			120
Software	16 Months		624			620
Capitalized learning content	43 Months		400			400
Trade names	32 Months		320			320
Developed technology	44 Months		5,320			5,320
Customer relationships	32 Months		2,910			2,910
Accumulated amortization			(2,674	)		(1,910	)
Total		$	8,288		$	9,048

Estimated Amortization Expense

Based on the recorded intangible assets at March 31, 2018, estimated amortization expense is expected to be as follows (in thousands):

	Amortization
Years Ending December 31,	Expense
Remainder of 2018	$	2,022
2019		2,626
2020		2,386
2021		1,254
2022		—
Total	$	8,288