Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2018

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):

				Developed			Customer
	Trademarks			Technology			Relationships			Total
Amortization period (in years)	5			10 - 12			4 - 12
Gross carrying amount at December 31, 2017	$	—		$	4,600		$	10,639		$	15,239
Accumulated amortization	0				(3,257	)		(7,617	)		(10,874	)
Intangible assets, net at December 31, 2017	$	—		$	1,343		$	3,022		$	4,365
Gross carrying amount at December 31, 2018	$	600		$	8,300		$	15,039		$	23,939
Accumulated amortization		(77	)		(3,978	)		(8,904	)		(12,959	)
Intangible assets, net at December 31, 2018	$	523		$	4,322		$	6,135		$	10,980

Amortization Expense Included in Condensed Consolidated Statements of Operations

The following table illustrates the amortization expense included in the consolidated statements of operations for the years ended December 31, 2018 and 2017 (in thousands):

	Year Ended December 31,
	2018		2017
Cost of revenue	$	721	$	448
Selling and marketing		1,364		1,007
Total	$	2,085	$	1,455

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 is as follows (in thousands):

2019	$	2,386
2020		2,385
2021		930
2022		930
2023		853
Thereafter		3,496
Total	$	10,980

3VR and TSS

Summary of Carrying Amount of Goodwill Resulting from Acquisitions of 3VR and TSS

The following table summarizes the carrying amount of goodwill resulting from the acquisitions of 3VR and TSS (in thousands):

	Premises		Identity		Total
Balance at December 31, 2017	$	—	$	—	$	—
Acquisition of businesses		5,796		3,490		9,286
Balance at December 31, 2018	$	5,796	$	3,490	$	9,286