Financial Statement Components (Tables)

12 Months Ended

Dec. 31, 2017

Statement Of Financial Position [Abstract]

Components of Cash and Cash Equivalents

Cash and cash equivalents consisted of the following (in thousands):

	December 31,		December 31,
	2017		2016
Cash	$	70,893	$	40,908
Money market funds		110,299		119,447
Total cash and cash equivalents	$	181,192	$	160,355

Components of Accounts Receivable, Net

Accounts receivable, net consisted of the following (in thousands):

	December 31,			December 31,
	2017			2016
Accounts receivable	$	42,243		$	25,687
Unbilled accounts receivable		3,808			4,990
Allowance for doubtful accounts		(712	)		(434	)
Accounts receivable, net	$	45,339		$	30,243

Components of Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consisted of the following (in thousands):

	December 31,		December 31,
	2017		2016
Prepaid expenses	$	13,690	$	9,780
Inventory		198		63
Other current assets		7,624		5,470
Total prepaid expenses and other current assets	$	21,512	$	15,313

Components of Property and Equipment, Net

Property and equipment, net consisted of the following (in thousands):

	December 31,			December 31,
	2017			2016
Computer hardware and software	$	74,555		$	61,546
Internal-use software development costs		18,217			9,931
Furniture and fixtures		6,293			4,508
Leasehold improvements		4,311			2,596
Property and equipment, gross		103,376			78,581
Less: accumulated depreciation and amortization		(60,078	)		(46,587	)
Property and equipment, net	$	43,298		$	31,994

Components of Accrued Liabilities

Accrued liabilities consisted of the following (in thousands):

	December 31,		December 31,
	2017		2016
Accrued compensation and benefits	$	18,578	$	14,041
Accrued sales, use, and telecom related taxes		11,828		7,220
Accrued marketing		7,020		5,082
Other accrued expenses		17,551		21,979
Total accrued liabilities	$	54,977	$	48,322

Summary of Carrying Values of Intangible Assets

The carrying values of intangible assets are as follows (in thousands):

				December 31, 2017				December 31, 2016
	Estimated Lives	Cost		Accumulated Amortization		Acquired Intangibles, Net		Accumulated Amortization		Acquired Intangibles, Net
Customer relationships	2 years	$	840	$	840	$	-	$	660	$	180
Developed technology	5 years		3,010		1,548		1,462		946		2,064
Total acquired intangible assets		$	3,850	$	2,388	$	1,462	$	1,606	$	2,244

Summary of Estimated Amortization Expense for Acquired Intangible Assets

Estimated amortization expense for acquired intangible assets for the following five fiscal years and thereafter is as follows (in thousands):

2018		602
2019		602
2020		258
2021		—
Total estimated amortization expense	$	1,462