Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2017

Goodwill And Intangible Assets Disclosure [Abstract]

Summary of Gross Carrying Amount and Accumulated Amortization for Intangible Assets Resulting from Acquisitions

The following table summarizes the gross carrying amount and accumulated amortization for intangible assets resulting from acquisitions (in thousands):

	Existing			Customer
	Technology			Relationship			Total
Amortization period (in years)		11.75		4.0 – 11.75
Gross carrying amount at December 31, 2016	$	4,600		$	10,639		$	15,239
Accumulated amortization		(2,809	)		(6,610	)		(9,419	)
Intangible Assets, net at December 31, 2016	$	1,791		$	4,029		$	5,820
Gross carrying amount at September 30, 2017	$	4,600		$	10,639		$	15,239
Accumulated amortization		(3,145	)		(7,366	)		(10,511	)
Intangible Assets, net at September 30, 2017	$	1,455		$	3,273		$	4,728

Amortization Expense Included in Condensed Consolidated Statements of Operations

The following table illustrates the amortization expense included in the condensed consolidated statements of operations for the three and nine months ended September 30, 2017 and 2016, respectively (in thousands):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Cost of revenue	$	112	$	112	$	336	$	336
Selling and marketing		252		252		756		756
Total	$	364	$	364	$	1,092	$	1,092

Estimated Future Amortization Expense of Purchased Intangible Assets with Definite Lives

The estimated annual future amortization expense for purchased intangible assets with definite lives over the next five years as of September 30, 2017 is as follows (in thousands):

2017 (remaining three months)	$	363
2018		1,455
2019		1,455
2020		1,455
Thereafter		—
Total	$	4,728