10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

___________________________________

FORM 10-Q

___________________________________

(Mark One)

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2019

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For transition period from               to

Commission File Number 001-36773

___________________________________

WORKIVA INC.

(Exact name of registrant as specified in its charter)

___________________________________

Delaware (State or other jurisdiction of incorporation or organization)	47-2509828 (I.R.S. Employer Identification Number)
2900 University Blvd Ames, IA 50010 (888) 275-3125
(Address of principal executive offices and zip code)
(888) 275-3125
(Registrant's telephone number, including area code)
___________________________________

Indicate by check mark whether the Registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ý No o

Indicate by check mark whether the Registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the Registrant was required to submit such files). Yes ý No o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer ý	Accelerated filer o
Non-accelerated filer o	Smaller reporting company ☐
	Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act): Yes ☐ No ý

Securities registered pursuant to Section 12(b) of the Act:
Title of each class	Trading Symbol	Name of each exchange on which registered
Class A common stock, par value $0.001	WK	New York Stock Exchange

As of August 2, 2019, there were approximately 36,762,217 shares of the registrant's Class A common stock and 9,265,596 shares of the registrant's Class B common stock outstanding.

WORKIVA INC.

TABLE OF CONTENTS

		Page
	Part I. Financial Information
Item 1.	Unaudited Consolidated Financial Statements:	1
	Condensed Consolidated Balance Sheets as of June 30, 2019 and December 31, 2018	1
	Condensed Consolidated Statements of Operations for the Three and Six Months Ended June 30, 2019 and 2018	3
	Condensed Consolidated Statements of Comprehensive Loss for the Three and Six Months Ended June 30, 2019 and 2018	4
	Consolidated Statements of Changes in Stockholders' Equity (Deficit) for the Three and Six Months Ended June 30, 2019 and 2018	5
	Condensed Consolidated Statements of Cash Flows for the Three and Six Months Ended June 30, 2019 and 2018	7
	Notes to Condensed Consolidated Financial Statements	9
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	22
Item 3.	Quantitative and Qualitative Disclosure About Market Risk	36
Item 4.	Controls and Procedures	36
	Part II. Other Information
Item 1.	Legal Proceedings	37
Item 1A.	Risk Factors	37
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	37
Item 6.	Exhibits	38
	Signatures	S-1

i

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

Certain statements in this Quarterly Report on Form 10-Q are “forward-looking statements” within the meaning of Section 21E of the Securities Exchange Act of 1934, as amended, and are subject to the safe harbor created thereby. All statements contained in this Quarterly Report on Form 10-Q other than statements of historical facts, including statements regarding our future results of operations and financial position, our business strategy and plans and our objectives for future operations, are forward-looking statements. The words “believe,” “may,” “will,” “estimate,” “continue,” “anticipate,” “intend,” “expect” and similar expressions are intended to identify forward-looking statements. We have based these forward-looking statements largely on our current expectations and projections about future events and financial trends that we believe may affect our financial condition, results of operations, business strategy, short-term and long-term business operations and objectives, and financial needs. These forward-looking statements are subject to a number of risks, uncertainties and assumptions, including those described in “Item 1A. Risk Factors” of our Annual Report on Form 10-K for the year ended December 31, 2018, in “Item 1A. Risk Factors” in Part II of this Quarterly Report on Form 10-Q and in any subsequent filing we make with the SEC, as well as in any documents incorporated by reference that describe risks and factors that could cause results to differ materially from those projected in these forward-looking statements.

Moreover, we operate in a very competitive and rapidly changing environment. New risks emerge from time to time. It is not possible for our management to predict all risks, nor can we assess the impact of all factors on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements we may make. In light of these risks, uncertainties and assumptions, the future events and trends discussed in this Quarterly Report on Form 10-Q may not occur and actual results could differ materially and adversely from those anticipated or implied in the forward-looking statements.

Although we believe that the expectations reflected in the forward-looking statements are reasonable, we cannot guarantee future results, levels of activity, performance, achievements or events and circumstances reflected in the forward-looking statements will occur. We are under no duty to update any of these forward-looking statements after completion of this Quarterly Report on Form 10-Q to conform these statements to actual results or revised expectations.

ii

Part I. Financial Information

Item 1.  Financial Statements

WORKIVA INC. CONDENSED CONSOLIDATED BALANCE SHEETS
(in thousands, except share and per share amounts)
	As of June 30, 2019		As of December 31, 2018
	(unaudited)
ASSETS
Current assets
Cash and cash equivalents	$	94,713	$	77,584
Marketable securities	42,855		20,764
Accounts receivable, net of allowance for doubtful accounts of $1,000 and $956 at June 30, 2019 and December 31, 2018, respectively	47,206		65,107
Deferred commissions	11,380		8,178
Other receivables	1,236		1,181
Prepaid expenses	7,963		4,417
Total current assets	205,353		177,231
Property and equipment, net	41,046		41,468
Operating lease right-of-use assets	16,510		—
Deferred commissions, non-current	13,259		10,569
Intangible assets, net	1,832		1,266
Other assets	1,982		577
Total assets	$	279,982	$	231,111

1

WORKIVA INC. CONDENSED CONSOLIDATED BALANCE SHEETS (continued)
(in thousands, except share and per share amounts)
	As of June 30, 2019		As of December 31, 2018
	(unaudited)
LIABILITIES AND STOCKHOLDERS’ EQUITY (DEFICIT)
Current liabilities
Accounts payable	$	4,768	$	5,461
Accrued expenses and other current liabilities	42,147		36,353
Deferred revenue	156,234		148,545
Current portion of financing obligations	1,285		1,222
Total current liabilities	204,434		191,581
Deferred revenue, non-current	28,049		25,171
Other long-term liabilities	1,284		6,891
Operating lease liabilities, non-current	20,038		—
Financing obligations, non-current	16,550		17,208
Total liabilities	270,355		240,851
Stockholders’ equity (deficit)
Class A common stock, $0.001 par value per share, 1,000,000,000 shares authorized, 36,633,696 and 34,498,391 shares issued and outstanding at June 30, 2019 and December 31, 2018, respectively	37		34
Class B common stock, $0.001 par value per share, 500,000,000 shares authorized, 9,265,596 and 9,545,596 shares issued and outstanding at June 30, 2019 and December 31, 2018, respectively	9		10
Preferred stock, $0.001 par value per share, 100,000,000 shares authorized, no shares issued and outstanding	—		—
Additional paid-in-capital	332,161		297,145
Accumulated deficit	(322,812)		(307,027)
Accumulated other comprehensive income	232		98
Total stockholders’ equity (deficit)	9,627		(9,740)
Total liabilities and stockholders’ equity (deficit)	$	279,982	$	231,111

See accompanying notes.

2

WORKIVA INC. CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (in thousands, except share and per share amounts) (unaudited)
	Three months ended June 30,				Six months ended June 30,
	2019		2018		2019		2018
Revenue
Subscription and support	$	60,472	$	48,837	$	116,595	$	95,307
Professional services	13,012		10,293		26,852		23,729
Total revenue	73,484		59,130		143,447		119,036
Cost of revenue
Subscription and support	10,202		8,637		20,011		17,439
Professional services	10,475		7,659		20,202		15,368
Total cost of revenue	20,677		16,296		40,213		32,807
Gross profit	52,807		42,834		103,234		86,229
Operating expenses
Research and development	21,795		20,718		43,806		40,845
Sales and marketing	28,213		22,252		53,578		43,258
General and administrative	11,226		21,654		21,609		33,422
Total operating expenses	61,234		64,624		118,993		117,525
Loss from operations	(8,427)		(21,790)		(15,759)		(31,296)
Interest expense	(433)		(449)		(873)		(899)
Other income, net	530		492		850		835
Loss before (benefit) provision for income taxes	(8,330)		(21,747)		(15,782)		(31,360)
(Benefit) provision for income taxes	(8)		21		3		26
Net loss	$	(8,322)	$	(21,768)	(15,785)		(31,386)
Net loss per common share:
Basic and diluted	$	(0.18)	$	(0.50)	$	(0.35)	$	(0.73)
Weighted-average common shares outstanding - basic and diluted	46,166,660		43,234,655		45,700,559		43,048,110

See accompanying notes.

3

WORKIVA INC. CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (in thousands) (unaudited)
	Three months ended June 30,				Six months ended June 30,
	2019		2018		2019		2018
Net loss	$	(8,322)	$	(21,768)	$	(15,785)	$	(31,386)
Other comprehensive income, net of tax
Foreign currency translation adjustment, net of income tax benefit (expense) of $(2) and $0 for the three months ended June 30, 2019 and 2018, respectively, and net of income tax benefit (expense) of $(5) and $0 for the six months ended June 30, 2019 and 2018, respectively	6		42		15		31
Unrealized gain (loss) on available-for-sale securities, net of income tax benefit (expense) of $(26) and $0 for the three months ended June 30, 2019 and 2018, respectively, and net of income tax benefit (expense) of $(41) and $0 for the six months ended June 30, 2019 and 2018, respectively	76		17		119		(28)
Other comprehensive income, net of tax	82		59		134		3
Comprehensive loss	$	(8,240)	$	(21,709)	$	(15,651)	$	(31,383)

See accompanying notes.

4

WORKIVA INC. CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (DEFICIT)
(in thousands) (unaudited)
	Common Stock (Class A and B)
	Shares	Amount		Additional Paid-in-Capital		Accumulated Other Comprehensive Income		Accumulated Deficit		Total Stockholders' Equity (Deficit)
Balances at December 31, 2018	44,044	$	44	$	297,145	$	98	$	(307,027)	$	(9,740)
Stock-based compensation expense	—	—		8,193		—		—		8,193
Issuance of common stock upon exercise of stock options	961	1		11,054		—		—		11,055
Issuance of common stock under employee stock purchase plan	101	—		2,149		—		—		2,149
Issuance of restricted stock units	25	—		—		—		—		—
Tax withholding related to net share settlements of stock-based compensation awards	(10)	—		(390)		—		—		(390)
Net loss	—	—		—		—		(7,463)		(7,463)
Other comprehensive income	—	—		—		52		—		52
Balances at March 31, 2019	45,121	$	45	$	318,151	$	150	$	(314,490)	$	3,856
Stock-based compensation expense	—	—		8,513		—		—		8,513
Issuance of common stock upon exercise of stock options	455	1		5,497		—		—		5,498
Issuance of restricted stock units	323	—		—		—		—		—
Net loss	—	—		—		—		(8,322)		(8,322)
Other comprehensive income	—	—		—		82		—		82
Balances at June 30, 2019	45,899	$	46	$	332,161	$	232	$	(322,812)	$	9,627

5

WORKIVA INC. CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (DEFICIT) (continued)
(in thousands) (unaudited)
	Common Stock (Class A and B)
	Shares	Amount		Additional Paid-in-Capital		Accumulated Other Comprehensive Income		Accumulated Deficit		Total Stockholders' Deficit
Balances at December 31, 2017	42,369	$	42	$	248,289	$	72	$	(265,337)	$	(16,934)
Cumulative-effect adjustment in connection with the adoption of ASU 2014-09	—	—		—		—		8,381		8,381
Stock-based compensation expense	—	—		5,905		—		—		5,905
Issuance of common stock upon exercise of stock options	296	1		3,075		—		—		3,076
Issuance of common stock under employee stock purchase plan	80	—		1,370		—		—		1,370
Issuance of restricted stock units	9	—		—		—		—		—
Tax withholding related to net share settlements of stock-based compensation awards	(61)	—		(1,342)		—		—		(1,342)
Net loss	—	—		—		—		(9,618)		(9,618)
Other comprehensive loss	—	—		—		(56)		—		(56)
Balances at March 31, 2018	42,693	$	43	$	257,297	$	16	$	(266,574)	$	(9,218)
Stock-based compensation expense	—	—		10,465		—		—		10,465
Issuance of common stock upon exercise of stock options	328	—		3,317		—		—		3,317
Issuance of restricted stock units	64	—		—		—		—		—
Tax withholding related to net share settlements of stock-based compensation awards	(23)	—		(519)		—		—		(519)
Net loss	—	—		—		—		(21,768)		(21,768)
Other comprehensive loss	—	—		—		59		—		59
Balances at June 30, 2018	43,062	$	43	$	270,560	$	75	$	(288,342)	$	(17,664)

See accompanying notes.

6

WORKIVA INC. CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
(in thousands) (unaudited)
	Three months ended June 30,				Six months ended June 30,
	2019		2018		2019		2018
Cash flows from operating activities
Net loss	$	(8,322)	$	(21,768)	$	(15,785)	$	(31,386)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	971		876		1,874		1,748
Stock-based compensation expense	8,513		10,465		16,706		16,370
Provision for doubtful accounts	233		139		46		183
(Accretion) amortization of premiums and discounts on marketable securities, net	(23)		(15)		(104)		3
Deferred income tax	(28)		—		(46)		—
Changes in assets and liabilities:
Accounts receivable	3,133		(236)		17,951		6,306
Deferred commissions	(3,833)		(2,020)		(5,862)		(3,669)
Operating lease right-of-use asset	556		—		1,224		—
Other receivables	161		148		(53)		175
Prepaid expenses and other	(310)		(2,020)		(3,546)		(1,789)
Other assets	58		(110)		(1,406)		(168)
Accounts payable	1,206		(1,294)		(356)		1,383
Deferred revenue	8,295		8,747		10,282		6,402
Operating lease liability	(813)		—		(1,468)		—
Accrued expenses and other liabilities	8,966		4,542		4,425		3,679
Net cash provided by (used in) operating activities	18,763		(2,546)		23,882		(763)
Cash flows from investing activities
Purchase of property and equipment	(454)		(210)		(2,197)		(219)
Purchase of marketable securities	(18,562)		(11,283)		(40,717)		(11,283)
Maturities of marketable securities	11,500		3,900		18,890		4,400
Purchase of intangible assets	(577)		(64)		(661)		(128)
Net cash used in investing activities	(8,093)		(7,657)		(24,685)		(7,230)

7

WORKIVA INC. CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (continued)
(in thousands) (unaudited)
	Three months ended June 30,				Six months ended June 30,
	2019		2018		2019		2018
Cash flows from financing activities
Proceeds from option exercises	5,498		3,318		16,553		6,393
Taxes paid related to net share settlements of stock-based compensation awards	—		(519)		(390)		(1,861)
Proceeds from shares issued in connection with employee stock purchase plan	—		—		2,149		1,370
Principal payments on capital lease and financing obligations	(301)		(294)		(595)		(592)
Proceeds from government grants	—		22		—		22
Net cash provided by financing activities	5,197		2,527		17,717		5,332
Effect of foreign exchange rates on cash	110		(85)		215		(177)
Net increase (decrease) in cash and cash equivalents	15,977		(7,761)		17,129		(2,838)
Cash and cash equivalents at beginning of period	78,736		65,256		77,584		60,333
Cash and cash equivalents at end of period	$	94,713	$	57,495	$	94,713	$	57,495
Supplemental cash flow disclosure
Cash paid for interest	$	422	$	435	$	886	$	868
Cash paid for income taxes, net of refunds	$	28	$	54	$	261	$	56
Supplemental disclosure of noncash investing and financing activities
Allowance for tenant improvements	$	—	$	105	$	—	$	127
Purchases of property and equipment, accrued but not paid	$	444	$	254	$	444	$	254

See accompanying notes.

8

WORKIVA INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

1. Organization and Significant Accounting Policies

Organization

Workiva Inc., a Delaware corporation, and its wholly-owned subsidiaries (the “Company” or “we” or “us”) is a leading provider of cloud-based solutions for connected reporting and compliance. Our platform, Wdesk, is used by thousands of public and private companies, government agencies and higher-education institutions. Wdesk offers controlled collaboration, data linking, data integrations, granular permissions, process management and a full audit trail. We sell to customers in the areas of: finance and accounting; risk and controls; regulatory reporting; financial close, management and performance reporting; and statutory and corporate tax reporting. Our operational headquarters are located in Ames, Iowa, with additional offices located in the United States, Europe, the Asia-Pacific region and Canada.

We updated our accounting policies on the use of estimates, impairment of long-lived assets and leases as a result of our adopting Financial Accounting Standards Board (FASB) guidance issued in accounting standards codification (ASC) 842, Leases, under the Accounting Standards Update (ASU) 2016-02 (collectively the new lease standard). Otherwise, there have been no changes to our significant accounting policies described in our Annual Report on Form 10-K for the year ended December 31, 2018, filed with the SEC on February 20, 2019, that have had a material impact on our condensed consolidated financial statements and related notes.

Basis of Presentation and Principles of Consolidation

The financial information presented in the accompanying unaudited condensed consolidated financial statements has been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) and in accordance with rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) regarding interim financial reporting. Accordingly, the financial statements do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. The condensed consolidated balance sheet data as of December 31, 2018 was derived from audited financial statements, but does not include all disclosures required by U.S. GAAP. In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all adjustments, consisting primarily of normal recurring accruals, necessary for a fair presentation of our financial position and results of operations. The operating results for the three and six months ended June 30, 2019 are not necessarily indicative of the results expected for the full year ending December 31, 2019.

Seasonality has affected our revenue, expenses and cash flows from operations. Revenue from professional services has been higher in the first quarter as many of our customers file their Form 10-K in the first calendar quarter. Sales and marketing expense has been higher in the third quarter due to our annual user conference in September. In addition, the timing of the payments of cash bonuses to employees during the first and fourth calendar quarters may result in some seasonality in operating cash flow. The condensed consolidated financial information should be read in conjunction with “Management’s Discussion and Analysis of Financial Condition and Results of Operations” contained in this report and the consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2018 filed with the SEC on February 20, 2019.

The unaudited condensed consolidated financial statements include the accounts of Workiva Inc. and its wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. Additionally, certain prior period amounts have been reclassified for consistency with the current year presentation. The reclassification of the prior period amounts were not material to the previously reported consolidated financial statements.

9

Use of Estimates

The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States requires us to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. We base our estimates on historical experience and various other assumptions believed to be reasonable. These estimates include, but are not limited to, the allowance for doubtful accounts, the determination of the relative selling prices of our services, the measurement of material rights, health insurance claims incurred but not yet reported, valuation of available-for-sale marketable securities, useful lives of deferred contract costs, intangible assets and property and equipment, income taxes, discount rates used in the valuation of right-of-use assets and lease liabilities, and certain assumptions used in the valuation of equity awards. While these estimates are based on our best knowledge of current events and actions that may affect us in the future, actual results may differ materially from these estimates.

Impairment of Long-Lived Assets

Long-lived assets, such as property, equipment, right-of-use assets and software and intangible assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset or asset group may not be recoverable. If circumstances require that a long-lived asset or asset group be tested for possible impairment, we first compare the undiscounted cash flows expected to be generated by that long-lived asset or asset group to its carrying amount. If the carrying amount of the long-lived asset or asset group is not recoverable on an undiscounted cash flow basis, an impairment is recognized to the extent that the carrying amount exceeds its fair value.

Leases

We determine if an arrangement is a lease at inception. Operating leases are included in operating lease right-of-use ("ROU") assets, other current liabilities, and operating lease liabilities on our condensed consolidated balance sheets. We currently have no finance leases.

ROU assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. Operating lease ROU assets and operating lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at the commencement date. Our variable lease payments consist of non-lease services related to the lease. Variable lease payments are excluded from the ROU assets and lease liabilities and are recognized in the period in which the obligation for those payments is incurred. As our leases do not provide an implicit rate, we use our incremental borrowing rate based on the information available at the commencement date in determining the present value of lease payments. The operating lease ROU asset also includes any lease payments made and excludes lease incentives incurred. Our lease terms may include options to extend or terminate the lease when it is reasonably certain that we will exercise that option. Lease expense for minimum lease payments is recognized on a straight-line basis over the lease term.

We have lease agreements with lease and non-lease components. We have elected to account for these lease and non-lease components as a single lease component. We are also electing not to apply the recognition requirements to short-term leases of 12 months or less and instead will recognize lease payments as expense on a straight-line basis over the lease term.

10

Recently Adopted Accounting Pronouncements

In February 2016, the Financial Accounting Standards Board ("FASB") issued guidance codified in ASC 842, Leases, which supersedes the guidance in former ASC 840, Leases, to increase transparency and comparability among organizations by requiring recognition of right-of-use assets and lease liabilities on the balance sheet and disclosure of key information about leasing arrangements (with the exception of short-term leases).

In July 2018, the FASB issued an update (ASU 2018-11) to the existing transition guidance that allows entities to recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. Effective January 1, 2019, we adopted ASC 842 using this new transition guidance. The comparative information has not been restated and continues to be reported under the accounting standard in effect for those periods.

We have elected to use the package of practical expedients, which allows us to not (1) reassess whether any expired or existing contracts are considered or contain leases; (2) reassess the lease classification for any expired or existing leases; and (3) reassess the initial direct costs for any existing leases. We did not elect the hindsight practical expedient, which permits entities to use hindsight in determining the lease term and assessing impairment.

Adoption of the new standard had a material impact on our condensed consolidated balance sheets. The most significant impacts related to the recognition of right-of-use assets and lease liabilities for operating leases. The adoption of ASC 842 had no impact on our condensed consolidated statements of operations or total cash flows from operations.

The cumulative effect of the changes made to our consolidated January 1, 2019 balance sheet for the adoption of ASC 842 were as follows (in thousands):

	As of December 31, 2018		Adjustments due to ASC 842 adoption		As of January 1, 2019
Assets
Operating right-of-use asset	$	—	$	15,694	$	15,694
Liabilities
Accrued expenses and other current liabilities	36,353		2,319		38,672
Other long-term liabilities	6,891		(6,007)		884
Operating lease liabilities, non-current	—		19,382		19,382

In August 2018, the FASB issued ASU 2018-15, Intangibles - Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract, which clarifies the accounting for implementation costs in cloud computing arrangements. The update will become effective for interim and annual periods beginning after December 15, 2019 and may be adopted either retrospectively or prospectively. Early adoption is permitted. We adopted this standard prospectively effective April 1, 2019. The adoption of this new guidance did not have a material impact on our consolidated financial statements.

11

New Accounting Pronouncements Not Yet Adopted

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which amends the current accounting guidance and requires the measurement of all expected losses based on historical experience, current conditions and reasonable and supportable forecasts. For trade receivables, loans, and other financial instruments, we will be required to use a forward-looking expected loss model that reflects probable losses rather than the incurred loss model for recognizing credit losses. The standard will become effective for interim and annual periods beginning after December 15, 2019, with early adoption permitted. Application of the amendments is through a cumulative-effect adjustment to retained earnings as of the effective date. We plan to adopt this standard on the effective date and are currently evaluating the impact of this new standard on our consolidated financial statements.

2. Supplemental Consolidated Balance Sheet Information

Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consisted of the following (in thousands):

	As of June 30, 2019		As of December 31, 2018
Accrued vacation	$	7,947	$	6,906
Accrued commissions	5,372		7,265
Accrued bonuses	7,337		5,643
Estimated health insurance claims	1,170		1,100
ESPP employee contributions	2,797		2,156
Customer deposits	9,594		7,395
Operating lease liabilities	2,785		—
Accrued other liabilities	5,145		5,888
	$	42,147	$	36,353

3. Cash Equivalents and Marketable Securities

At June 30, 2019, marketable securities consisted of the following (in thousands):

	Amortized Cost		Unrealized Gains		Unrealized Losses		Aggregate Fair Value
Money market funds	$	71,937	$	—	$	—	$	71,937
U.S. treasury debt securities	3,931		5		—		3,936
U.S. corporate debt securities	38,833		97		(11)		38,919
	$	114,701	$	102	$	(11)	$	114,792
Included in cash and cash equivalents	$	71,937	$	—	$	—	$	71,937
Included in marketable securities	$	42,764	$	102	$	(11)	$	42,855

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At December 31, 2018, marketable securities consisted of the following (in thousands):

	Amortized Cost		Unrealized Gains		Unrealized Losses		Aggregate Fair Value
Money market funds	$	52,068	$	—	$	—	$	52,068
Commercial paper	7,448		—		—		7,448
U.S. treasury debt securities	2,494		—		(1)		2,493
U.S. corporate debt securities	10,890		—		(67)		10,823
	$	72,900	$	—	$	(68)	$	72,832
Included in cash and cash equivalents	$	52,068	$	—	$	—	$	52,068
Included in marketable securities	$	20,832	$	—	$	(68)	$	20,764

The following table presents gross unrealized losses and fair values for those marketable securities that were in an unrealized loss position as of June 30, 2019, aggregated by investment category and the length of time that individual securities have been in a continuous loss position (in thousands):

	As of June 30, 2019
	Less than 12 months				12 months or greater
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
U.S. treasury debt securities	$	—	$	—	$	—	$	—
U.S. corporate debt securities	996		(1)		3,494		(10)
Total	$	996	$	(1)	$	3,494	$	(10)

We do not believe any of the unrealized losses represented an other-than-temporary impairment based on our evaluation of available evidence, which includes our intent as of June 30, 2019 to hold these investments until the cost basis is recovered.

4. Fair Value Measurements

We determine the fair values of our financial instruments based on the fair value hierarchy, which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The fair value assumes that the transaction to sell the asset or transfer the liability occurs in the principal or most advantageous market for the asset or liability and establishes that the fair value of an asset or liability shall be determined based on the assumptions that market participants would use in pricing the asset or liability. The classification of a financial asset or liability within the hierarchy is based upon the lowest level input that is significant to the fair value measurement. The fair value hierarchy prioritizes the inputs into three levels that may be used to measure fair value:

Level 1 - Inputs are unadjusted quoted prices in active markets for identical assets or liabilities.

Level 2 - Inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument.

Level 3 - Inputs are unobservable inputs based on our assumptions.

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Financial Assets

Cash equivalents primarily consist of AAA-rated money market funds with overnight liquidity and no stated maturities. We classified cash equivalents as Level 1 due to the short-term nature of these instruments and measured the fair value based on quoted prices in active markets for identical assets.

When available, our marketable securities are valued using quoted prices for identical instruments in active markets. If we are unable to value our marketable securities using quoted prices for identical instruments in active markets, we value our investments using broker reports that utilize quoted market prices for comparable instruments. We validate, on a sample basis, the derived prices provided by the brokers by comparing their assessment of the fair values of our investments against the fair values of the portfolio balances of another third-party professional pricing service. As of June 30, 2019, all of our marketable securities were valued using quoted prices for comparable instruments in active markets and are classified as Level 2.

Based on our valuation of our money market funds and marketable securities, we concluded that they are classified in either Level 1 or Level 2, and we have no financial assets measured using Level 3 inputs. The following table presents information about our assets that are measured at fair value on a recurring basis using the above input categories (in thousands):

	Fair Value Measurements as of June 30, 2019						Fair Value Measurements as of December 31, 2018
Description	Total		Level 1		Level 2		Total		Level 1		Level 2
Money market funds	$	71,937	$	71,937	$	—	$	52,068	$	52,068	$	—
Commercial paper	—		—		—		7,448		—		7,448
U.S. treasury debt securities	3,936		—		3,936		2,493		—		2,493
U.S. corporate debt securities	38,919		—		38,919		10,823		—		10,823
	$	114,792	$	71,937	$	42,855	$	72,832	$	52,068	$	20,764
Included in cash and cash equivalents	$	71,937					$	52,068
Included in marketable securities	$	42,855					$	20,764

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5. Leases

Operating Leases

We lease certain office and residential space under non-cancelable operating leases with various lease terms through June 2043. Leases with an initial term of 12 months or less are not recorded on the balance sheet; we recognize lease expense for these leases on a straight-line basis over the lease term. Certain office leases include one or more options to renew, with renewal terms that can extend the lease term from 3 to 5 years. The exercise of lease renewal options is at our sole discretion and is generally excluded from the lease term at lease inception. Our leases generally require us to pay a proportionate share of real estate taxes, insurance, common area maintenance, and other operating costs in addition to a base or fixed rent.

The components of lease expense were as follows (in thousands):

	Three months ended June 30, 2019		Six months ended June 30, 2019
Operating lease cost	$	839	$	1,764
Short-term lease cost	299		538
Variable lease cost	229		432
	$	1,367	$	2,734

Supplemental cash flow information related to leases was as follows (in thousands):

	Three months ended June 30, 2019		Six months ended June 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	1,119	$	2,080
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	$	—	$	2,033

Other supplemental information related to leases was as follows:

	As of June 30, 2019
Weighted Average Remaining Lease Term (in years)
Operating leases	8.0
Weighted Average Discount Rate
Operating leases	5.7	%

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As of June 30, 2019, future estimated minimum lease payments under non-cancelable operating leases were as follows (in thousands):

	Operating Leases
Remainder of 2019	$	1,899
2020	4,200
2021	4,241
2022	3,872
2023	3,540
Thereafter	11,255
Total minimum lease payments	29,007
Less: Amount representing interest	(6,184)
Total	$	22,823

As of June 30, 2019, we did not have additional operating or financing leases that had not yet commenced.

6. Commitments and Contingencies

Other Purchase Commitments

In June 2019, we entered into certain non-cancelable agreements with third-party providers for our use of cloud services in the ordinary course of business. Under these agreements, we are committed to purchase $0.9 million in fiscal year 2019, $1.7 million in fiscal year 2020, $1.7 million in fiscal year 2021, and $0.9 million in fiscal year 2022.

Litigation

From time to time we may become involved in legal proceedings or be subject to claims arising in the ordinary course of our business. We evaluate the development of legal matters on a regular basis and accrue a liability when we believe a loss is probable and the amount can be reasonably estimated. Although the results of litigation and claims cannot be predicted with certainty, we currently believe that the final outcome of any currently pending legal proceedings to which we are a party will not have a material adverse effect on our business, operating results, financial condition or cash flows. Regardless of the outcome, litigation can have an adverse impact on us because of defense and settlement costs, diversion of management resources and other factors.

7. Stock-Based Compensation

We grant stock-based incentive awards to attract, motivate and retain qualified employees, non-employee directors and consultants, and to align their financial interests with those of our stockholders. We utilize stock-based compensation in the form of restricted stock awards, restricted stock units, options to purchase Class A common stock and Employee Stock Purchase Plan (“ESPP”) purchase rights.

As of June 30, 2019, awards outstanding under the 2009 Plan consisted of stock options, and awards outstanding under the 2014 Plan consisted of stock options and restricted stock units.

As of June 30, 2019, 2,381,097 shares of Class A common stock were available for grant under the 2014 Plan.

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Our ESPP became effective on June 13, 2017. Under the ESPP, eligible employees are granted options to purchase shares of Class A common stock at the lower of 85% of the fair market value of the stock at the time of grant or 85% of the fair market value at the time of exercise. Options to purchase shares are granted twice yearly on or about January 15 and July 15 and are exercisable on or about the succeeding July 14 and January 14, respectively, of each year. As of June 30, 2019, 4,719,674 shares of Class A common stock were available for issuance under the ESPP. No participant may purchase more than $12,500 worth of common stock in a six-month offering period.

Stock-Based Compensation Expense

Stock-based compensation expense was recorded in the following cost and expense categories consistent with the respective employee or service provider’s related cash compensation (in thousands):

	Three months ended June 30,				Six months ended June 30,
	2019		2018		2019		2018
Cost of revenue
Subscription and support	$	399	$	228	$	756	$	399
Professional services	431		146		840		296
Operating expenses
Research and development	1,851		1,495		3,751		2,516
Sales and marketing	2,032		1,440		3,996		2,553
General and administrative	3,800		7,156		7,363		10,606
Total	$	8,513	$	10,465	$	16,706	$	16,370

Stock Options

The following table summarizes the option activity under the Plans for the six months ended June 30, 2019:

	Options	Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value
					(in thousands)
Outstanding at December 31, 2018	6,400,175	$	13.65	6.1	$	142,340
Granted	—	—
Forfeited	(26,160)	17.66
Exercised	(1,416,176)	11.69
Outstanding at June 30, 2019	4,957,839	$	14.19	5.9	$	217,653
Exercisable at June 30, 2019	4,047,243	$	13.59	5.6	$	180,085

Options to purchase Class A common stock generally vest over a three- or four-year period and are generally granted for a term of ten years. The total intrinsic value of options exercised during the six months ended June 30, 2019 and 2018 was $53.3 million and $8.7 million, respectively.

No options were granted during the six months ended June 30, 2019 and 2018. The total fair value of options vested during the six months ended June 30, 2019 and 2018 was approximately $3.9

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million and $8.4 million, respectively. Total unrecognized compensation expense of $5.6 million related to options will be recognized over a weighted-average period of 1.7 years.

Restricted Stock Units

Restricted stock units granted to employees generally vest over a three- or four-year period in equal, annual installments or with three-year cliff vesting. Restricted stock units granted to non-employee members of our Board of Directors generally have one-year cliff vesting from the date of grant. The recipient of a restricted stock unit award under the Plan will have no rights as a stockholder until share certificates are issued by us, but, at the discretion of our Compensation Committee, has the right to receive a dividend equivalent payment in the form of additional restricted stock units. Additionally, until the shares are issued, they have no voting rights and may not be bought or sold. The fair value for restricted stock units is calculated based on the stock price on the date of grant. The total fair value of restricted stock units vested during the six months ended June 30, 2019 and 2018 was approximately $6.3 million and $7.2 million, respectively.

The following table summarizes the restricted stock unit activity under the Plan for the six months ended June 30, 2019:

	Number of Shares	Weighted- Average Grant Date Fair Value
Unvested at December 31, 2018	2,359,261	$	23.95
Granted	800,726	42.12
Forfeited	(54,893)	27.39
Vested(1)	(324,749)	19.52
Unvested at June 30, 2019	2,780,345	$	29.63

(1) As of June 30, 2019, recipients of 250,750 shares had elected to defer settlement of the vested restricted stock units in accordance with our Nonqualified Deferred Compensation Plan resulting in total deferred units of 531,292 as of June 30, 2019. 

Compensation expense associated with unvested restricted stock units is recognized on a straight-line basis over the vesting period. At June 30, 2019, there was approximately $60.6 million of total unrecognized compensation expense related to restricted stock units, which is expected to be recognized over a weighted-average period of 2.5 years.

Employee Stock Purchase Plan

The fair value of each share issued under the ESPP is estimated on the date of grant using the Black-Scholes option-pricing model. Expected volatility is based on the historical volatility of our common stock. The expected term represents the period of time the ESPP purchase rights are expected to be outstanding. The expected term for the ESPP purchase rights approximates the offering period. The risk-free interest rate is based on yields on U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) with a maturity similar to the estimated expected term of the ESPP purchase rights.

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The fair value of our ESPP purchase rights was estimated assuming no expected dividends and the following weighted-average assumptions:

	Six months ended June 30,
	2019	2018
Expected term (in years)	0.5	0.5
Risk-free interest rate	2.6%	1.8%
Expected volatility	48.6%	22.2%

There were no grants made pursuant to the ESPP during the three months ended June 30, 2019 and 2018. During the six months ended June 30, 2019, 100,949 shares of common stock were purchased under the ESPP at a weighted-average price of $21.29 per share, resulting in cash proceeds of $2.1 million.

Compensation expense associated with ESPP purchase rights is recognized on a straight-line basis over the vesting period. At June 30, 2019, there was approximately $65,000 of total unrecognized compensation expense related to the ESPP, which is expected to be recognized over a weighted-average period of 0.03 years.

8. Revenue Recognition

Disaggregation of Revenue

The following table presents our revenues disaggregated by industry (in thousands). Certain prior year amounts have been reclassified to conform with current period presentation. These reclassifications have no impact on total revenue.

	Three months ended June 30,				Six months ended June 30,
	2019		2018		2019		2018
Information technology	$	10,001	$	7,786	$	19,163	$	15,145
Consumer discretionary	8,329		6,819		16,308		13,670
Industrials	8,212		6,944		16,004		13,816
Diversified financials	8,263		6,453		15,701		13,351
Banks	6,945		5,741		13,623		11,584
Healthcare	6,930		5,095		13,514		10,439
Energy	5,446		4,646		11,090		9,498
Other	19,358		15,646		38,044		31,533
Total revenues	$	73,484	$	59,130	$	143,447	$	119,036

The following table presents our revenues disaggregated by type of good or service (in thousands):

	Three months ended June 30,				Six months ended June 30,
	2019		2018		2019		2018
Subscription and support	$	60,472	$	48,837	$	116,595	$	95,307
XBRL professional services	9,522		6,916		20,932		16,768
Other services	3,490		3,377		5,920		6,961
Total revenues	$	73,484	$	59,130	$	143,447	$	119,036

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Deferred Revenue

We recognized $51.6 million and $43.3 million of revenue during the three months ended June 30, 2019 and 2018, respectively, that was included in the deferred revenue balances at the beginning of the respective periods. We recognized $88.1 million and $77.0 million of revenue during the six months ended June 30, 2019 and 2018, respectively, that was included in the deferred revenue balances at the beginning of the respective periods.

Transaction Price Allocated to the Remaining Performance Obligations

As of June 30, 2019, we expect revenue of approximately $197.7 million to be recognized from remaining performance obligations for subscription contracts. We expect to recognize approximately $160.8 million of these remaining performance obligations over the next 12 months, with the balance recognized thereafter.

9. Net Loss Per Share

Basic net loss per share is computed by dividing the net loss by the weighted-average number of shares of common stock outstanding during the period. Diluted net loss per share is computed by giving effect to all potential shares of common stock, including our outstanding stock options, stock related to unvested restricted stock units, and common stock issuable pursuant to the ESPP to the extent dilutive. Basic and diluted net loss per share was the same for each period presented, as the inclusion of all potential common shares outstanding would have been anti-dilutive.

The net loss per share is allocated based on the participation rights of the Class A and Class B common shares as if the loss for the year has been distributed. As the liquidation and dividend rights are identical, the net loss is allocated on a proportionate basis.

A reconciliation of the denominator used in the calculation of basic and diluted loss per share is as follows (in thousands, except share and per share data):

	Three months ended
	June 30, 2019				June 30, 2018
	Class A		Class B		Class A		Class B
Numerator
Net loss	$	(6,626)	$	(1,696)	$	(16,755)	$	(5,013)
Denominator
Weighted-average common shares outstanding - basic and diluted	36,758,866		9,407,794		33,278,982		9,955,673
Basic and diluted net loss per share	$	(0.18)	$	(0.18)	$	(0.50)	$	(0.50)

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	Six months ended
	June 30, 2019				June 30, 2018
	Class A		Class B		Class A		Class B
Numerator
Net loss	$	(12,523)	$	(3,262)	$	(24,040)	$	(7,346)
Denominator
Weighted-average common shares outstanding - basic and diluted	36,255,515		9,445,044		32,972,720		10,075,390
Basic and diluted net loss per share	$	(0.35)	$	(0.35)	$	(0.73)	$	(0.73)

The anti-dilutive securities excluded from the weighted-average shares used to calculate the diluted net loss per common share were as follows:

	As of
	June 30, 2019	June 30, 2018
Shares subject to outstanding common stock options	4,957,839	7,415,412
Shares subject to unvested restricted stock units	2,780,345	2,046,275
Shares issuable pursuant to the ESPP	89,311	102,756

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following discussion and analysis of our financial condition and results of our operations should be read in conjunction with the condensed consolidated financial statements and related notes included elsewhere in this report and in our Annual Report on Form 10-K filed with the Securities and Exchange Commission on February 20, 2019. In addition to historical consolidated financial information, this discussion contains forward-looking statements that involve risks and uncertainties. Our actual results could differ materially from those discussed below. Factors that could cause or contribute to these differences include, but are not limited to, those identified below, and those discussed in “Item 1A. Risk Factors” of our Annual Report on Form 10-K for the year ended December 31, 2018, in “Item 1A. Risk Factors” in Part II of this Quarterly Report on Form 10-Q and in any subsequent filing we make with the SEC.

Overview

Workiva is a leading provider of cloud-based solutions for connected reporting and compliance. Our platform, Wdesk, is used by thousands of public and private companies, government agencies and higher-education institutions. Wdesk offers controlled collaboration, data linking, data integrations, granular permissions, process management and a full audit trail. Wdesk users are able to combine narrative with their data, which greatly improves insight in their financial, regulatory and management reporting processes. As of June 30, 2019, 3,421 organizations, including more than 75% of Fortune 500^® companies, subscribed to our Wdesk platform.⁽¹⁾

(1) Claim not confirmed by FORTUNE or Fortune Media IP Limited. FORTUNE^® and FORTUNE 500^® are registered trademarks of Fortune Media IP Limited and are used under license. FORTUNE and Fortune Media IP Limited are not affiliated with, and do not endorse products or services of, Workiva Inc.

Our customers can connect Wdesk with data in more than 100 cloud and on-premise applications. In June 2018, we expanded our Wdesk platform with Wdata, which combines new data preparation capabilities with existing connectors and Application Programming Interfaces (APIs) to help our customers more easily capture, enrich and connect large datasets to Wdesk. Integrating enterprise business systems with our platform eliminates manual steps in the reporting and analysis process after the data leaves our customers' Enterprise Resource Planning (ERP) and other data systems and enables data assurance throughout the entire reporting process with an immutable audit trail. Wdata also enables a broader set of business users to explore complex data at scale and better manage data transformations in the office of the CFO.

We market our solutions under six broad categories: SEC Reporting, Management Reporting, Integrated Risk, Capital Markets, Global Statutory Reporting, and Regulated Reporting. Within those categories, Workiva offers the following solutions: SEC Reporting, SEDAR Reporting, Financial Reporting, Connected Financials, Management Reporting, Audit Management, Controls Management, Enterprise Risk Management, Policies and Procedures, Capital Markets, Prospectus Fund, Shareholder Reports, Insurance Statutory Reporting, Insurance Prospectus, CAFR/AFR, Stress Testing, Living Will, Tax Reporting, CASS Compliance, Global Statutory Reporting, IFRS 17.

We operate our business on a Software-as-a-Service (SaaS) model. Customers enter into annual or multi-year subscription contracts to gain access to Wdesk. Our subscription fee includes the use of our software and technical support. Prior to the third quarter of 2018, our subscription pricing was based primarily on the number of corporate entities, number of users, level of customer support and length of contract. Thereafter, we began converting existing customer orders to, and signing new orders primarily based on, a solution-based licensing model. Under this new model, operating metrics related to a customer's expected use of each solution determine the price. The solution-based model has a higher contract value than the seat-based model because it typically offers customers unlimited seats per solution and a reduced administrative workload. We expect a substantial majority of our subscription revenue will

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be priced on the solution-based licensing model by year-end 2019. We charge customers additional fees primarily for document setup and XBRL tagging services.

We generate sales primarily through our direct sales force and, to a lesser extent, our customer success and professional services teams. In addition, we augment our direct sales channel with partnerships. Our advisory and service partners offer a wider range of domain and functional expertise that broadens the capabilities of Wdesk, bringing scale and support to customers and prospects. Our technology partners enable more data and process integrations to help customers connect critical transactional systems directly to Wdesk, which becomes a central repository of trusted data, with powerful linking, auditability and control features.

Our integrated platform, subscription-based model and exceptional customer support have contributed to a low rate of customer turnover while achieving strong revenue growth. Our subscription and support revenue retention rate was 95.4% (excluding add-on seats) for the twelve months ended June 30, 2019.

We continue to invest in the development of our solutions, infrastructure and sales and marketing to drive long-term growth. Our full-time employee headcount expanded to 1,421 at June 30, 2019 from 1,287 at June 30, 2018, an increase of 10.4%.

We have achieved significant revenue growth in recent periods. Our revenue grew to $73.5 million and $143.4 million during the three and six months ended June 30, 2019, respectively, from $59.1 million and $119.0 million during the three and six months ended June 30, 2018, respectively. We incurred net losses of $8.3 million and $15.8 million during the three and six months ended June 30, 2019, respectively, compared to $21.8 million and $31.4 million during the three and six months ended June 30, 2018, respectively.

Converting existing customer orders to a solution-based licensing model has contributed to the acceleration of growth in our subscription revenue year-to-date, and we expect it to continue to do so through the remainder of 2019. This conversion has also contributed to the improvement in our subscription and support revenue retention rate including add-ons for the same periods. We expect the benefit of this contribution to wane beginning in the last quarter of 2019. Accordingly, we will need to find new sources of revenue to sustain our growth rate beyond 2019. To maintain our revenue growth for the longer term, we have been accelerating our investments in talent, processes and technology, particularly for expansion in EMEA, integrated risk, statutory reporting and Wdata. If these investments do not meet our expectations, we may be unable to sustain our revenue growth rate. We expect these investments to increase operating losses in absolute terms and as a percentage of revenue at least through the second half of 2019, ahead of any incremental revenue contribution they may generate after 2019.

Key Factors Affecting Our Performance

Generate Growth From Existing Customers. Wdesk can exhibit a powerful network effect within an enterprise, meaning that the usefulness of our platform attracts additional users and more data. Since solution-based licensing offers our customers an unlimited number of seats for each solution purchased, we expect customers to add more seats in Wdesk over time. As more employees in an enterprise use Wdesk, additional opportunities for collaboration and automation drive demand among their colleagues for additional solutions. Furthermore, converting customer orders to solution-based licensing typically generates a one-time increase in contract value for each solution.

Pursue New Customers. Our first software solution enabled customers to streamline and automate their SEC regulatory filing process. In 2013, we began expanding into adjacent markets challenged with managing large, complex processes with many contributors and disparate sets of business data. We currently sell to new customers in the areas of finance and accounting; risk and controls; regulatory

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reporting; financial close, management and performance reporting; and statutory and corporate tax reporting. We intend to continue to build our sales and marketing organization and leverage our brand equity to attract new customers.

Offer More Solutions. We intend to introduce new solutions to continue to meet growing demand for our Wdesk platform. Our close and trusted relationships with our customers are a source for new use cases, features and solutions. We have a disciplined process for tracking, developing and releasing new solutions that are designed to have immediate, broad applicability; a strong value proposition; and a high return on investment for both Workiva and our customers. Our advance planning team assesses customer needs, conducts industry-based research and defines new markets. This vetting process involves our sales, product marketing, customer success, professional services, research and development, finance and senior management teams.

Expand Across Enterprises. Our success in delivering multiple solutions has created demand from customers for a broader-based, enterprise-wide Wdesk platform. In response, we have been improving our technology and realigning sales and marketing to capitalize on our growing enterprise-wide opportunities. We believe this expansion will add seats and revenue and continue to support our high revenue retention rates. However, we expect that enterprise-wide deals will be larger and more complex, which tend to lengthen the sales cycle.

Add Partners. We continue to expand our relationships with partners, including consulting and advisory firms, technology partners, and implementation partners. Our global partners, including global strategic consulting and advisory firms, identify opportunities for our platform to help companies transform financial reporting and integrated risk processes. We also partner with regional accounting, consulting and implementation partners. These highly skilled regional partners provide subject-matter expertise in the implementation of specific solutions and extend our direct sales force by referring opportunities to us. Technology partners expand the ecosystem of our connected reporting and compliance platform and enable data connections and process integrations to further transform critical business functions, as we capitalize on growing demand for enterprise-wide opportunities. We believe that our partner ecosystem extends our global reach, accelerates the usage and adoption of our platform, and enables more efficient delivery of professional services.

Investment in growth. We plan to continue to invest in the development of our Wdesk platform to enhance our current offerings and build new features. In addition, we expect to continue to invest in our sales, marketing, professional services and customer success organizations to drive additional revenue and support the needs of our growing customer base and to take advantage of opportunities that we have identified in EMEA, as well as use cases for integrated risk, statutory reporting and Wdata.

Seasonality. Our revenue from professional services has some degree of seasonality. Many of our customers employ our professional services just before they file their Form 10-K, often in the first calendar quarter. Our sales and marketing expense also has some degree of seasonality. Sales and marketing expense is generally higher in the third quarter since we hold our annual user conference in September. In addition, the timing of the payments of cash bonuses to employees during the first and fourth calendar quarters may result in some seasonality in operating cash flow.

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Key Performance Indicators

	Three months ended June 30,						Six months ended June 30,
	2019			2018			2019			2018
	(dollars in thousands)
Financial metrics
Total revenue	$	73,484		$	59,130		$	143,447		$	119,036
Percentage increase in total revenue	24.3		%	19.7		%	20.5		%	17.5		%
Subscription and support revenue	$	60,472		$	48,837		$	116,595		$	95,307
Percentage increase in subscription and support revenue	23.8		%	19.2		%	22.3		%	18.4		%
Subscription and support as a percent of total revenue	82.3		%	82.6		%	81.3		%	80.1		%

	As of June 30,
	2019	2018
Operating metrics
Number of customers	3,421	3,222
Subscription and support revenue retention rate	95.4%	95.6%
Subscription and support revenue retention rate including add-ons	114.5%	106.9%
Number of customers with annual contract value $100k+	558	366
Number of customers with annual contract value $150k+	238	161

Total customers. We believe total number of customers is a key indicator of our financial success and future revenue potential. We define a customer as an entity with an active subscription contract as of the measurement date. Our customer is typically a parent company or, in a few cases, a significant subsidiary that works with us directly. Companies with publicly listed securities account for a substantial majority of our customers.

Subscription and support revenue retention rate. We calculate our subscription and support revenue retention rate based on all customers that were active at the end of the same calendar quarter of the prior year (“base customers”). We begin by annualizing the subscription and support revenue recorded in the same calendar quarter of the prior year for those base customers who are still active at the end of the current quarter. We divide the result by the annualized subscription and support revenue in the same quarter of the prior year for all base customers.

Our subscription and support revenue retention rate was 95.4% as of June 30, 2019, down slightly compared to the rate as of June 30, 2018. We believe that our success in maintaining a high rate of revenue retention is attributable primarily to our robust technology platform and strong customer service.

Subscription and support revenue retention rate including add-ons. Add-on revenue includes the change in both solutions and seats purchased and pricing for existing customers. We calculate our subscription and support revenue retention rate including add-ons by annualizing the subscription and support revenue recorded in the current quarter for our base customers that were active at the end of the current quarter. We divide the result by the annualized subscription and support revenue in the same quarter of the prior year for all base customers.

Our subscription and support revenue retention rate including add-ons was 114.5% as of the quarter ended June 30, 2019, up from 106.9% as of June 30, 2018.

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In the first quarter of 2019, we began calculating revenue retention rates using quarterly ASC 606 revenue instead of our prior method using monthly ASC 605 revenue. We expect quarterly measurements will be less variable than the single month measurements we previously reported.

Annual contract value. Our annual contract value (“ACV”) for each customer is calculated by annualizing the subscription and support revenue recognized during each quarter. We believe the increase in the number of larger contracts shows our progress in expanding our customers' adoption of Wdesk.

Components of Results of Operations

Revenue

We generate revenue through the sale of subscriptions to our cloud-based software and the delivery of professional services. We serve a wide range of customers in many industries, and our revenue is not concentrated with any single customer or small group of customers. For the six months ended June 30, 2019 and 2018, no single customer represented more than 1% of our revenue, and our largest 10 customers accounted for less than 5% of our revenue in the aggregate.

We generate sales directly through our sales force and partners. We also identify some sales opportunities with existing customers through our customer success and professional services teams.

Our customer contracts typically range in length from twelve to 36 months. We typically invoice our customers for subscription fees in advance, with payment due at the start of the subscription term. From time to time, we offer limited incentives for customers to enter into contract terms of more than one year, typically for terms of two or three years. Our arrangements do not contain general rights of return.

Subscription and Support Revenue. We recognize subscription and support revenue on a ratable basis over the contract term beginning on the date that our service is made available to the customer. Amounts that are invoiced are initially recorded as deferred revenue.

Professional Services Revenue. We believe our professional services facilitate the sale of our subscription service to certain customers. To date, most of our professional services have consisted of document set up, XBRL tagging, and consulting with our customers on business processes and best practices for using Wdesk. Our professional services are not required for customers to utilize our solution. We recognize revenue for document set ups when the service is complete and control has transferred to the customer. Revenues from XBRL tagging and consulting services are recognized as the services are performed.

Cost of Revenue

Cost of revenue consists primarily of personnel and related costs directly associated with our professional services, customer success teams and training personnel, including salaries, benefits, bonuses, and stock-based compensation; the costs of contracted third-party vendors; the costs of server usage by our customers; information technology costs; and facility costs. Costs of server usage are comprised primarily of fees paid to Google Cloud Platform and Amazon Web Services.

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Sales and Marketing Expenses

Sales and marketing expenses consist primarily of personnel and related costs, including salaries, benefits, bonuses, commissions, travel, and stock-based compensation. Other costs included in this expense are marketing and promotional events, our annual user conference, online marketing, product marketing, information technology costs, and facility costs. Sales commissions paid where the amortization period is one year or less are expensed as incurred. All other sales commissions are considered incremental costs of obtaining a contract with a customer and are deferred and amortized on a straight-line basis over a period of benefit that we have determined to be three years.

Research and Development Expenses

Research and development expenses consist primarily of personnel and related costs, including salaries, benefits, bonuses, and stock-based compensation; costs of server usage by our developers; information technology costs; and facility costs.

General and Administrative Expenses

General and administrative expenses consist primarily of personnel and related costs for our executive, finance and accounting, legal, human resources, and administrative personnel, including salaries, benefits, bonuses, and stock-based compensation; legal, accounting, and other professional service fees; other corporate expenses; information technology costs; and facility costs.

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Results of Operations

The following table sets forth selected consolidated statement of operations data for each of the periods indicated:

	Three months ended June 30,				Six months ended June 30,
	2019		2018		2019		2018
	(in thousands)
Revenue
Subscription and support	$	60,472	$	48,837	$	116,595	$	95,307
Professional services	13,012		10,293		26,852		23,729
Total revenue	73,484		59,130		143,447		119,036
Cost of revenue
Subscription and support(1)	10,202		8,637		20,011		17,439
Professional services(1)	10,475		7,659		20,202		15,368
Total cost of revenue	20,677		16,296		40,213		32,807
Gross profit	52,807		42,834		103,234		86,229
Operating expenses
Research and development(1)	21,795		20,718		43,806		40,845
Sales and marketing(1)	28,213		22,252		53,578		43,258
General and administrative(1)	11,226		21,654		21,609		33,422
Total operating expenses	61,234		64,624		118,993		117,525
Loss from operations	(8,427)		(21,790)		(15,759)		(31,296)
Interest expense	(433)		(449)		(873)		(899)
Other income, net	530		492		850		835
Loss before provision for income taxes	(8,330)		(21,747)		(15,782)		(31,360)
(Benefit) provision for income taxes	(8)		21		3		26
Net loss	$	(8,322)	$	(21,768)	$	(15,785)	$	(31,386)

(1)  Stock-based compensation expense included in these line items was as follows:

	Three months ended June 30,				Six months ended June 30,
	2019		2018		2019		2018
	(in thousands)
Cost of revenue
Subscription and support	$	399	$	228	$	756	$	399
Professional services	431		146		840		296
Operating expenses
Research and development	1,851		1,495		3,751		2,516
Sales and marketing	2,032		1,440		3,996		2,553
General and administrative	3,800		7,156		7,363		10,606
Total stock-based compensation expense	$	8,513	$	10,465	$	16,706	$	16,370

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The following table sets forth our consolidated statement of operations data as a percentage of revenue for each of the periods indicated:

	Three months ended June 30,				Six months ended June 30,
	2019		2018		2019		2018
Revenue
Subscription and support	82.3	%	82.6	%	81.3	%	80.1	%
Professional services	17.7		17.4		18.7		19.9
Total revenue	100.0		100.0		100.0		100.0
Cost of revenue
Subscription and support	13.9		14.6		14.0		14.7
Professional services	14.3		13.0		14.1		12.9
Total cost of revenue	28.2		27.6		28.1		27.6
Gross profit	71.8		72.4		71.9		72.4
Operating expenses
Research and development	29.7		35.0		30.5		34.3
Sales and marketing	38.4		37.6		37.4		36.3
General and administrative	15.3		36.6		15.1		28.1
Total operating expenses	83.4		109.2		83.0		98.7
Loss from operations	(11.6)		(36.8)		(11.1)		(26.3)
Interest expense	(0.6)		(0.8)		(0.6)		(0.8)
Other income, net	0.7		0.8		0.6		0.7
Loss before provision for income taxes	(11.5)		(36.8)		(11.1)		(26.4)
Provision for income taxes	—		—		—		—
Net loss	(11.5)	%	(36.8)	%	(11.1)	%	(26.4)	%

Comparison of Three and Six Months Ended June 30, 2019 and 2018

Revenue

	Three months ended June 30,					Six months ended June 30,
	2019		2018		% Change	2019		2018		% Change
	(dollars in thousands)
Revenue
Subscription and support	$	60,472	$	48,837	23.8%	$	116,595	$	95,307	22.3%
Professional services	$	13,012	$	10,293	26.4%	$	26,852	$	23,729	13.2%
Total revenue	$	73,484	$	59,130	24.3%	$	143,447	$	119,036	20.5%

Total revenue increased $14.4 million for the three months ended June 30, 2019 compared to the same quarter a year ago due primarily to a $11.6 million increase in subscription and support revenue. Growth in subscription and support revenue in the second quarter was attributable to strong demand for a broad range of solutions and the continued conversion of existing customer accounts to a solution-based licensing model. Additionally, professional services revenue increased $2.7 million due primarily to an increase in certain XBRL professional services that we do not expect to continue in the next two quarters. The total number of our customers expanded 6.2% from June 30, 2018 to June 30, 2019.

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Total revenue increased $24.4 million for the six months ended June 30, 2019 compared to the same period a year ago due primarily to a $21.3 million increase in subscription and support revenue. Growth in professional services revenue was attributable primarily to an increase in XBRL tagging services. Professional services revenue increased at a slower rate than subscription and support revenue for the six months ended June 30, 2019 compared to the same period a year ago. As our customers become familiar with our platform, they typically become more self sufficient and require fewer professional services. We expect the revenue growth rate from subscription and support to continue to outpace revenue growth from professional services on an annual basis.

Cost of Revenue

	Three months ended June 30,					Six months ended June 30,
	2019		2018		% Change	2019		2018		% Change
	(dollars in thousands)
Cost of revenue
Subscription and support	$	10,202	$	8,637	18.1%	$	20,011	$	17,439	14.7%
Professional services	10,475		7,659		36.8%	20,202		15,368		31.5%
Total cost of revenue	$	20,677	$	16,296	26.9%	$	40,213	$	32,807	22.6%

Cost of revenue increased $4.4 million during the three months ended June 30, 2019 compared to the same quarter a year ago due primarily to $2.9 million in higher cash-based compensation, benefits and travel costs due in part to increased headcount, $0.5 million of additional stock-based compensation and a $0.5 million increase in consulting fees. These increases in headcount and consulting fees were due to our continued investment and support of our new platform and solutions.

Cost of revenue increased $7.4 million during the six months ended June 30, 2019 compared to the same period a year ago, due primarily to an increase in cash-based compensation, benefits and travel costs of $4.6 million due in part to higher headcount, $0.9 million of additional stock-based compensation, a $1.0 million increase in consulting fees and a $0.7 million rise in the cost of cloud infrastructure services to support our expanding customer base. The increases in headcount and consulting fees were the result of our continued investment in and support of our new platform and solutions.

Operating Expenses

	Three months ended June 30,					Six months ended June 30,
	2019		2018		% Change	2019		2018		% Change
	(dollars in thousands)
Operating expenses
Research and development	$	21,795	$	20,718	5.2%	$	43,806	$	40,845	7.2%
Sales and marketing	28,213		22,252		26.8%	53,578		43,258		23.9%
General and administrative	11,226		21,654		(48.2)%	21,609		33,422		(35.3)%
Total operating expenses	$	61,234	$	64,624	(5.2)%	$	118,993	$	117,525	1.2%

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Research and Development

Research and development expenses increased $1.1 million in the three months ended June 30, 2019 compared to the same quarter a year ago due primarily to $0.3 million in higher cash-based compensation and benefits, $0.4 million in additional stock-based compensation and a $0.2 million increase in the cost of cloud infrastructure services. We continue to dedicate resources to developing the next generation of Wdesk, which has resulted in an increased investment in research and development.

Research and development expenses increased $3.0 million in the six months ended June 30, 2019 compared to the same period a year ago due primarily to higher cash-based compensation, benefits, and travel costs of $1.0 million, additional stock-based compensation of $1.2 million and a $0.8 million increase in the cost of cloud infrastructure services.

Sales and Marketing

Sales and marketing expenses increased $6.0 million during the three months ended June 30, 2019 compared to the three months ended June 30, 2018 due primarily to $4.4 million in higher cash-based compensation, benefits, travel costs, $0.6 million in additional stock-based compensation and a $0.5 million increase in the cost of marketing programs. Headcount in sales and marketing increased 16.8% in the quarter ended June 30, 2019 compared to the same quarter a year ago. We expect to continue to invest in sales and marketing employees for future revenue growth. The increase in the cost of marketing programs is due to increased partnership and international expansion activity.

Sales and marketing expenses increased $10.3 million during the six months ended June 30, 2019 compared to the same period a year ago due primarily to higher cash-based compensation, benefits, and travel costs of $7.6 million, additional stock-based compensation of $1.4 million, an increase in professional service fees of $0.4 million related to consulting and recruiting, and an increase in the cost of marketing programs of $0.5 million. The increase in marketing programs was due to increased partnership and international marketing activities.

General and Administrative

General and administrative expenses decreased $10.4 million in the three months ended June 30, 2019 compared to the same quarter a year ago due primarily to lower cash-based compensation, benefits, and travel costs of $7.3 million and reduced stock-based compensation expense of $3.4 million. General and administrative expense as a percentage of revenue improved to 15.3% in the latest quarter from 36.6% the same quarter last year due primarily to a reduction of expenses for executive compensation.

General and administrative expenses decreased $11.8 million during the six months ended June 30, 2019 compared to the same period a year ago. This decrease was due primarily to $8.3 million in lower cash-based compensation, benefits and travel as well as a $3.4 million decrease in stock-based compensation. In the second quarter of 2018, we recorded an additional $5.9 million and $3.6 million of cash-based and equity-based compensation, respectively, pursuant to a separation agreement with our former CEO.

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Non-Operating Income (Expenses)

	Three months ended June 30,				Six months ended June 30,
	2019		2018		2019		2018
	(dollars in thousands)
Interest expense	$	(433)	$	(449)	$	(873)	$	(899)
Other income, net	530		492		850		835

Interest Expense and Other Income, Net

Interest expense and Other income, net remained relatively flat during the three and six months ended June 30, 2019 compared to the same period a year ago.

Liquidity and Capital Resources

	Three months ended June 30,				Six months ended June 30,
	2019		2018		2019		2018
	(in thousands)
Cash flow provided by (used in) operating activities	$	18,763	$	(2,546)	$	23,882	$	(763)
Cash flow used in investing activities	(8,093)		(7,657)		(24,685)		(7,230)
Cash flow provided by financing activities	5,197		2,527		17,717		5,332
Net increase (decrease) in cash and cash equivalents, net of impact of exchange rates	$	15,977	$	(7,761)	$	17,129	$	(2,838)

As of June 30, 2019, our cash, cash equivalents and marketable securities totaled $137.6 million. To date, we have financed our operations primarily through the proceeds of our initial public offering, private placements of equity, debt that was settled in equity and cash from operating activities. We have generated significant operating losses and negative cash flows from operating activities as reflected in our accumulated deficit and consolidated statements of cash flows. We expect to continue to incur operating losses in the future. As a result, we may require additional capital resources to continue to grow our business. We believe that current cash and cash equivalents, cash flows from operating activities, availability under our existing credit facility and the ability to offer and sell securities pursuant to our shelf registration statement will be sufficient to fund our operations for at least the next twelve months.

In August 2014, we entered into a $15.0 million credit facility with Silicon Valley Bank. Borrowing capacity is equal to the most recent month’s subscription and support revenue multiplied by a percentage that adjusts based on the prior quarter’s customer retention rate. The credit facility can be used to fund working capital and general business requirements. The credit facility is secured by all of our assets and has first priority over our other debt obligations and requires us to maintain certain financial covenants, including the maintenance of at least $5.0 million of cash on hand or unused borrowing capacity. The credit facility contains certain restrictive covenants that limit our ability to transfer or dispose of assets, merge with other companies or consummate certain changes of control, acquire other companies, pay dividends, incur additional indebtedness and liens, effect changes in management and enter into new businesses. The credit facility has a variable interest rate equal to the bank’s prime lending rate with interest payable monthly and the principal balance due at maturity. The credit facility matures in August 2020.

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Pursuant to the credit facility, a letter of credit totaling $500,000 was outstanding at June 30, 2019. This letter of credit, which reduces the availability under the credit facility, was issued as a maintenance deposit for an office lease. The letter of credit expires every year but has a feature that automatically renews the term for an additional year with an ultimate expiration date of February 28, 2030.

We filed a universal shelf registration statement on Form S-3 with the SEC, which became effective August 10, 2017. Under the shelf registration statement, we may offer and sell, from time to time in the future in one or more public offerings, our Class A common stock, preferred stock, debt securities, warrants, rights and units. The aggregate initial offering price of all securities sold by us under the shelf registration statement will not exceed $250.0 million.

Operating Activities

For the three months ended June 30, 2019, cash provided by operating activities was $18.8 million. The primary factors affecting our operating cash flows during the period were our net loss of $8.3 million, adjusted for non-cash charges of $1.0 million for depreciation and amortization of our property and equipment and intangible assets, $8.5 million of stock-based compensation expense, and a $17.4 million net change in operating assets and liabilities. The primary drivers of the changes in operating assets and liabilities were a $3.1 million decrease in accounts receivable, a $8.3 million increase in deferred revenue, a $9.0 million increase in accrued expenses and other liabilities and a $1.2 million increase in accounts payable partially offset by a $3.8 million increase in deferred commissions. Customer growth and contract renewals for longer terms accounted for most of the increase in deferred revenue. We offer limited incentives for customers to enter into contract terms for more than one year. Deferred commissions increased due primarily to payments made to our sales force related to the direct and incremental costs of obtaining a customer contract. The decrease in accounts receivable and the increases in accounts payable and accrued expenses and other liabilities were attributable primarily to the timing of our billings, cash collections, and cash payments.

For the three months ended June 30, 2018, cash used in operating activities was $2.5 million. The primary factors affecting our operating cash flows during the period were our net loss of $21.8 million, adjusted for non-cash charges of $0.9 million for depreciation and amortization of our property and equipment and intangible assets, $10.5 million of stock-based compensation expense (including $3.6 million pursuant to a separation agreement with our former CEO), and a $7.8 million net change in operating assets and liabilities. Included in our net loss during the second quarter of 2018 was a $6.6 million cash payment made to our former CEO pursuant to a separation agreement. The primary drivers of the changes in operating assets and liabilities were a $8.7 million increase in deferred revenue, a $4.5 million increase in accrued expenses and other liabilities partially offset by a $2.0 million increase in deferred commissions, a $2.0 million increase in prepaid expenses and a $1.3 million decrease in accounts payable. Customer growth and contract renewals for longer terms accounted for most of the increase in deferred revenue. Deferred commissions increased primarily due to additional payments made to our sales force related to the direct and incremental costs of obtaining a customer contract. The increase in accrued expenses and other liabilities and decrease in accounts payable were primarily attributable to the timing of our cash payments. The increase in prepaid expenses was attributable primarily to an upfront payment for our annual user conference.

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For the six months ended June 30, 2019, cash provided by operating activities was $23.9 million. The primary factors affecting our operating cash flows during the period were our net loss of $15.8 million, adjusted for non-cash charges of $1.9 million for depreciation and amortization of our property and equipment and intangible assets, $16.7 million of stock-based compensation expense, and a $21.2 million net change in operating assets and liabilities. The primary drivers of the changes in operating assets and liabilities were a $10.3 million increase in deferred revenue, a $4.4 million increase in accrued expenses and other liabilities, and a $18.0 million decrease in accounts receivable partially offset by a $5.9 million increase in deferred commissions, a $3.5 million increase in prepaid expenses and a $1.4 million increase in other assets. Customer growth and contract renewals for longer terms accounted for most of the increase in deferred revenue. The increase in deferred commissions was primarily due to payments made to our sales force related to the direct and incremental costs of obtaining a customer contract. The increase in accrued expenses and other liabilities and decrease in accounts receivable were primarily attributable to the timing of our billings, cash collections, and cash payments. The increases in other assets and prepaid expenses was attributable primarily to timing of payments relating to cloud infrastructure services and our annual user conference.

For the six months ended June 30, 2018, cash used in operating activities was $0.8 million. The primary factors affecting our operating cash flows during the period were our net loss of $31.4 million, adjusted for non-cash charges of $1.7 million for depreciation and amortization of our property and equipment and intangible assets, $16.4 million of stock-based compensation expense (including $3.6 million pursuant to a separation agreement with our former CEO), and a $12.3 million net change in operating assets and liabilities. Included in our net loss during the six months ended June 30, 2018 was a $6.6 million cash payment made to our former CEO pursuant to a separation agreement. The primary drivers of the changes in operating assets and liabilities were a $6.4 million increase in deferred revenue, a $3.7 million increase in accrued expenses and other liabilities, a $1.4 million increase in accounts payable and a $6.3 million decrease in accounts receivable partially offset by a $3.7 million increase in deferred commissions and a $1.8 million increase in prepaid expenses. Customer growth and contract renewals for longer terms accounted for most of the increase in deferred revenue. The increase in deferred commissions was primarily due to additional payments made to our sales force related to the direct and incremental costs of obtaining a customer contract. The increases in accounts payable and accrued expenses and other liabilities and decrease in accounts receivable were primarily attributable to the timing of our billings, cash collections, and cash payments. The increase in prepaid expenses was attributable primarily to an upfront payment for our annual user conference.

Investing Activities

Cash used in investing activities of $8.1 million for the three months ended June 30, 2019 was due primarily to $18.6 million in purchases of marketable securities, $0.5 million of capital expenditures and $0.6 million in purchases of intangible assets partially offset by $11.5 million from maturities of marketable securities. Our capital expenditures were associated primarily with computer equipment in support of expanding our workforce.

Cash used in investing activities of $7.7 million for the three months ended June 30, 2018 was due primarily to $11.3 million in purchases of marketable securities partially offset by proceeds of $3.9 million from maturities of marketable securities.

Cash used in investing activities of $24.7 million for the six months ended June 30, 2019 was due primarily to $40.7 million in purchases of marketable securities, $2.2 million in capital expenditures and $0.7 million in purchases of intangible assets partially offset by proceeds of $18.9 million from maturities of marketable securities. Our capital expenditures were associated primarily with computer and technology purchases in support of expanding our workforce.

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Cash used in investing activities of $7.2 million for the six months ended June 30, 2018 was due primarily to $11.3 million in purchases of marketable securities partially offset by proceeds of $4.4 million from maturities of marketable securities.

Financing Activities

Cash provided by financing activities of $5.2 million for the three months ended June 30, 2019 was due primarily to $5.5 million in proceeds from option exercises.

Cash provided by financing activities of $2.5 million for the three months ended June 30, 2018 was due primarily to $3.3 million in proceeds from option exercises partially offset by $0.5 million in taxes paid related to the net share settlements of stock-based compensation awards and $0.3 million in payments on capital lease and financing obligations.

Cash provided by financing activities of $17.7 million for the six months ended June 30, 2019 was due primarily to $16.6 million in proceeds from option exercises and $2.1 million in proceeds from shares issued in connection with our employee stock purchase plan partially offset by $0.4 million in taxes paid related to the net share settlements of stock-based compensation awards and $0.6 million in payments on financing obligations.

Cash provided by financing activities of $5.3 million for the six months ended June 30, 2018 was due primarily to $6.4 million in proceeds from option exercises and $1.4 million in proceeds from shares issued in connection with our employee stock purchase plan partially offset by $1.9 million in taxes paid related to the net share settlements of stock-based compensation awards and $0.6 million in payments on capital lease and financing obligations.

Contractual Obligations and Commitments

In June 2019, we entered into certain non-cancelable agreements with third-party providers for our use of cloud services in the ordinary course of business. Under these agreements, we are committed to purchase $0.9 million in fiscal year 2019, $1.7 million in fiscal year 2020, $1.7 million in fiscal year 2021, and $0.9 million in fiscal year 2022. Other than these cloud services purchase commitments, there were no material changes in our contractual obligations and commitments from those disclosed in the Annual Report on Form 10-K for the year ended December 31, 2018 filed with the SEC on February 20, 2019.

Off-Balance Sheet Arrangements

During all periods presented, we did not have any relationships with unconsolidated entities or financial partnerships, such as entities often referred to as structured finance or special purpose entities, which would have been established for the purpose of facilitating off-balance sheet arrangements or other contractually narrow or limited purposes. As a result, we are not exposed to any financing, liquidity, market or credit risk that could arise if we had engaged in those types of relationships.

Critical Accounting Policies and Estimates

Our condensed consolidated financial statements are prepared in accordance with accounting principles generally accepted in the United States. U.S. GAAP. The preparation of these condensed consolidated financial statements requires us to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue, costs and expenses, income taxes and related disclosures. On an ongoing basis, we evaluate our estimates and assumptions. Our actual results may differ from these estimates under different assumptions or conditions.

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During the six months ended June 30, 2019, there were no significant changes to our critical accounting policies and estimates as described in the financial statements contained in the Annual Report on Form 10-K for the year ended December 31, 2018 filed with the SEC on February 20, 2019.

Item 3. Quantitative and Qualitative Disclosures about Market Risk 

For quantitative and qualitative disclosures about market risk, see “Item 7A., Quantitative and Qualitative Disclosures About Market Risk” of our Annual Report on Form 10-K for the year ended December 31, 2018. Our exposures to market risk have not changed materially since December 31, 2018.

Item 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

Under the supervision and with the participation of our principal executive officer and principal financial officer, our management conducted an evaluation of the effectiveness of the design and operation of our disclosure controls and procedures, as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act, as of the end of the period covered by this report. Our disclosure controls and procedures are intended to provide assurance at a reasonable level that the information we are required to disclose in reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in SEC rules and forms, and that such information is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosures.

In designing and evaluating our disclosure controls and procedures, management recognizes that any disclosure controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives. In addition, the design of disclosure controls and procedures must reflect the fact that there are resource constraints and that management is required to apply its judgment in evaluating the benefits of possible controls and procedures relative to their costs.

Based on management’s evaluation, our principal executive officer and principal financial officer concluded that our disclosure controls and procedures are designed to, and are effective to, provide assurance at a reasonable level that the information we are required to disclose in reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in SEC rules and forms, and that such information is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosures.

Changes in Internal Control Over Financial Reporting

Under the supervision and with the participation of our management, including our principal executive officer and principal financial officer, we conducted an evaluation of any changes in our internal control over financial reporting (as such term is defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) that occurred during our most recently completed fiscal quarter. Based on that evaluation, our principal executive officer and principal financial officer concluded that there has not been any material change in our internal control over financial reporting during the quarter covered by this report that materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

36

Part II. Other Information

Item 1. Legal Proceedings

From time to time we may become involved in legal proceedings or be subject to claims arising in the ordinary course of our business. We are not presently a party to any legal proceedings that in the opinion of our management, if determined adversely to us, would have a material adverse effect on our business, financial condition, operating results or cash flows. Regardless of the outcome, litigation can have an adverse impact on us because of defense and settlement costs, diversion of management resources and other factors.

Item 1A. Risk Factors

In addition to the other information set forth in this report, you should carefully consider the factors discussed in Part I, “Item 1A. Risk Factors” in our 2018 Annual Report on Form 10-K, which could materially affect our business, financial condition or future results. Other than the item noted below, there have been no material changes during fiscal 2019 to the risk factors that were included in the Form 10-K.

Risks Related to Our Business and Industry

Our reported financial results may be adversely affected by changes in accounting principles generally accepted in the United States, including those related to leases.

Generally accepted accounting principles in the United States are subject to interpretation by the Financial Accounting Standards Board (FASB), the SEC, and various bodies formed to promulgate and interpret appropriate accounting principles. A change in these principles or interpretations could have a significant effect on our reported financial results and could affect the reporting of transactions completed before the announcement of a change.

In February 2016, the FASB issued guidance codified in ASC 842, Leases (ASU 2016-02), which amends the guidance in former ASC 840, Leases. We adopted this new standard on the effective date of January 1, 2019. The application of this guidance resulted in the addition of right-of-use assets and lease liabilities on the consolidated balance sheet. We have implemented changes to our accounting processes, internal controls and disclosures to support the new standard. See Note 1 to our accompanying condensed consolidated financial statements for information about ASU 2016-02.

Any difficulties in implementing new or revised accounting principles could cause us to fail to meet our financial reporting obligations, which could result in regulatory discipline, harm investors’ confidence in us, and adversely affect our stock price.

Item 2. Unregistered Sales of Securities and Use of Proceeds

Sales of Unregistered Securities

Not applicable.

Use of Proceeds from Public Offerings of Common Stock

There has been no material change in the planned use of proceeds from our initial public offering as described in our final prospectus filed with the SEC pursuant to Rule 424(b) under the Securities Act on December 12, 2014.

37

Item 6. Exhibits

The following exhibits are being filed herewith or incorporated by reference herein:

Exhibit Number	Description
31.1	Certification of the Chief Executive Officer, pursuant to Rule 13a-14(a)/15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification of the Chief Financial Officer, pursuant to Rule 13a-14(a)/15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1	Certification of the Chief Executive Officer, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2	Certification of the Chief Financial Officer, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101	The following financial information from Workiva Inc.'s Quarterly Report on Form 10-Q for the quarter ended June 30, 2019 formatted in Inline XBRL (Extensible Business Reporting Language) includes: (i) the Condensed Consolidated Balance Sheets, (ii) the Condensed Consolidated Statements of Operations, (iii) the Condensed Consolidated Statements of Comprehensive Loss, (iv) the Consolidated Statements of Changes in Stockholders Equity (Deficit), (v) the Condensed Consolidated Statements of Cash Flows, and (vi) Notes to the Condensed Consolidated Financial Statements.

38

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized on this 6th day of August, 2019.

WORKIVA INC.
By:	/s/ Martin J. Vanderploeg, Ph.D.
Name:	Martin J. Vanderploeg, Ph.D.
Title:	President and Chief Executive Officer
By:	/s/ J. Stuart Miller
Name:	J. Stuart Miller
Title:	Executive Vice President and Chief Financial Officer
By:	/s/ Jill Klindt
Name:	Jill Klindt
Title:	Senior Vice President, Treasurer and Chief Accounting Officer

S-1

EX-31.1

CERTIFICATION UNDER SECTION 302 OF THE

SARBANES-OXLEY ACT OF 2002

I, Martin J. Vanderploeg, Ph.D., certify that:

1.  I have reviewed this Quarterly Report on Form 10-Q of Workiva Inc.;

2.  Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.  Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.  The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and have:

a.  Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.  Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.  Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.  Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.  The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a.  All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b.  Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

August 6, 2019 /s/ Martin J. Vanderploeg, Ph.D. Martin J. Vanderploeg, Ph.D. President and Chief Executive Officer (Principal Executive Officer)

EX-31.2

CERTIFICATION UNDER SECTION 302 OF THE

SARBANES-OXLEY ACT OF 2002

I, J. Stuart Miller, certify that:

1.  I have reviewed this Quarterly Report on Form 10-Q of Workiva Inc.;

2.  Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.  Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.  The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and have:

a.  Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.  Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.  Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.  Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.  The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a.  All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b.  Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

August 6, 2019 /s/ J. Stuart Miller J. Stuart Miller Executive Vice President and Chief Financial Officer (Principal Financial Officer)

EX-32.1

CERTIFICATION UNDER SECTION 906 OF THE

SARBANES-OXLEY ACT OF 2002

I, Martin J. Vanderploeg, President and Chief Executive Officer of Workiva Inc. (the “Company”), do hereby certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

1.the Quarterly Report on Form 10-Q of the Company for the period ended June 30, 2019 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2.the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company for the periods presented therein.

August 6, 2019 /s/ Martin J. Vanderploeg, Ph.D. Martin J. Vanderploeg, Ph.D. President and Chief Executive Officer (Principal Executive Officer)

EX-32.2

CERTIFICATION UNDER SECTION 906 OF THE

SARBANES-OXLEY ACT OF 2002

I, J. Stuart Miller, Chief Financial Officer of Workiva Inc. (the “Company”), do hereby certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

1.the Quarterly Report on Form 10-Q of the Company for the period ended June 30, 2019 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2.the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company for the periods presented therein.

August 6, 2019 /s/ J. Stuart Miller J. Stuart Miller Executive Vice President and Chief Financial Officer (Principal Financial Officer)

XML

Cover Page - shares	6 Months Ended
	Jun. 30, 2019	Aug. 02, 2019
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2019
Document Transition Report	false
Entity File Number	001-36773
Entity Registrant Name	WORKIVA INC
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	47-2509828
Entity Address, Address Line One	2900 University Blvd
Entity Address, City or Town	Ames
Entity Address, State or Province	IA
Entity Address, Postal Zip Code	50010
City Area Code	888
Local Phone Number	275-3125
Entity Central Index Key	0001445305
Document Fiscal Year Focus	2019
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Amendment Flag	false
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Title of 12(b) Security	Class A common stock, par value $0.001
Trading Symbol	WK
Security Exchange Name	NYSE
Class A Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		36,762,217
Class B Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		9,265,596

XML

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 94,713	$ 77,584
Marketable securities	42,855	20,764
Accounts receivable, net of allowance for doubtful accounts of $1000 and $956 at June 30, 2019 and December 31, 2018, respectively	47,206	65,107
Deferred commissions	11,380	8,178
Other receivables	1,236	1,181
Prepaid expenses	7,963	4,417
Total current assets	205,353	177,231
Property and equipment, net	41,046	41,468
Operating lease right-of-use assets	16,510
Deferred commissions, non-current	13,259	10,569
Intangible assets, net	1,832	1,266
Other assets	1,982	577
Total assets	279,982	231,111
Current liabilities
Accounts payable	4,768	5,461
Accrued expenses and other current liabilities	42,147	36,353
Deferred revenue	156,234	148,545
Current portion of financing obligations	1,285
Current portion of financing obligations		1,222
Total current liabilities	204,434	191,581
Deferred revenue, non-current	28,049	25,171
Other long-term liabilities	1,284	6,891
Operating lease liabilities, non-current	20,038
Financing obligations, non-current	16,550
Financing obligations, non-current		17,208
Total liabilities	270,355	240,851
Stockholders’ equity (deficit)
Preferred stock, $0.001 par value per share, 100,000,000 shares authorized, no shares issued and outstanding	0	0
Additional paid-in-capital	332,161	297,145
Accumulated deficit	(322,812)	(307,027)
Accumulated other comprehensive income	232	98
Total stockholders’ equity (deficit)	9,627	(9,740)
Total liabilities and stockholders’ equity (deficit)	279,982	231,111
Class A Common Stock
Stockholders’ equity (deficit)
Common stock	37	34
Class B Common Stock
Stockholders’ equity (deficit)
Common stock	$ 9	$ 10

XML

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Allowance for doubtful accounts	$ 1,000	$ 956
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized	100,000,000	100,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Class A Common Stock
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, share authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	36,633,696	34,498,391
Common stock, shares outstanding	36,633,696	34,498,391
Class B Common Stock
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, share authorized	500,000,000	500,000,000
Common stock, shares issued	9,265,596	9,545,596
Common stock, shares outstanding	9,265,596	9,545,596

XML

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue
Total revenues	$ 73,484	$ 59,130	$ 143,447	$ 119,036
Cost of revenue
Total cost of revenue	20,677	16,296	40,213	32,807
Gross profit	52,807	42,834	103,234	86,229
Operating expenses
Research and development	21,795	20,718	43,806	40,845
Sales and marketing	28,213	22,252	53,578	43,258
General and administrative	11,226	21,654	21,609	33,422
Total operating expenses	61,234	64,624	118,993	117,525
Loss from operations	(8,427)	(21,790)	(15,759)	(31,296)
Interest expense	(433)	(449)	(873)	(899)
Other income, net	530	492	850	835
Loss before (benefit) provision for income taxes	(8,330)	(21,747)	(15,782)	(31,360)
(Benefit) provision for income taxes	(8)	21	3	26
Net loss	$ (8,322)	$ (21,768)	$ (15,785)	$ (31,386)
Net loss per common share:
Basic and diluted (in dollars per share)	$ (0.18)	$ (0.50)	$ (0.35)	$ (0.73)
Weighted-average common shares outstanding - basic and diluted (in shares)	46,166,660	43,234,655	45,700,559	43,048,110
Subscription and support
Revenue
Total revenues	$ 60,472	$ 48,837	$ 116,595	$ 95,307
Cost of revenue
Total cost of revenue	10,202	8,637	20,011	17,439
Professional Services
Revenue
Total revenues	13,012	10,293	26,852	23,729
Cost of revenue
Total cost of revenue	$ 10,475	$ 7,659	$ 20,202	$ 15,368

XML

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net loss	$ (8,322)	$ (21,768)	$ (15,785)	$ (31,386)
Other comprehensive income (loss), net of tax
Foreign currency translation adjustment, net of income tax benefit (expense) of $(2) and $0 for the three months ended June 30, 2019 and 2018, respectively, and net of income tax benefit (expense) of $(5) and $0 for the six months ended June 30, 2019 and 2018, respectively	6	42	15	31
Unrealized gain (loss) on available-for-sale securities, net of income tax benefit (expense) of $(26) and $0 for the three months ended June 30, 2019 and 2018, respectively, and net of income tax benefit (expense) of $(41) and $0 for the six months ended June 30, 2019 and 2018, respectively	76	17	119	(28)
Other comprehensive income (loss), net of tax	82	59	134	3
Comprehensive loss	$ (8,240)	$ (21,709)	$ (15,651)	$ (31,383)

XML

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Foreign currency translation adjustment, tax (expense) benefit	$ (2)	$ 0	$ (5)	$ 0
Unrealized gain on available-for-sale securities, tax benefit (expense)	$ (26)	$ 0	$ (41)	$ 0

XML

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Thousands	Total	Common Stock (Class A and B)	Additional Paid-in-Capital	Accumulated Other Comprehensive Income	Accumulated Deficit
Shares, Outstanding, Beginning at Dec. 31, 2017		42,369,000
Beginning of the period at Dec. 31, 2017	$ (16,934)	$ 42	$ 248,289	$ 72	$ (265,337)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	5,905		5,905
Issuance of common stock upon exercise of stock options (in shares)		296,000
Issuance of common stock upon exercise of stock options	3,076	$ 1	3,075
Issuance of common stock under employee stock purchase plan (in shares)		80,000
Issuance of common stock under employee stock purchase plan	1,370		1,370
Issuance of restricted stock units (in shares)		9,000
Tax withholding related to net share settlements of stock-based compensation awards (in shares)		(61,000)
Tax withholding related to net share settlements of stock-based compensation awards	(1,342)		(1,342)
Net loss	(9,618)				(9,618)
Other comprehensive income (loss)	(56)			(56)
End of period at Mar. 31, 2018	(9,218)	$ 43	257,297	16	(266,574)
Shares, Outstanding, Ending at Mar. 31, 2018		42,693,000
Shares, Outstanding, Beginning at Dec. 31, 2017		42,369,000
Beginning of the period at Dec. 31, 2017	(16,934)	$ 42	248,289	72	(265,337)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(31,386)
Other comprehensive income (loss)	3
End of period at Jun. 30, 2018	(17,664)	$ 43	270,560	75	(288,342)
Shares, Outstanding, Ending at Jun. 30, 2018		43,062,000
Shares, Outstanding, Beginning at Mar. 31, 2018		42,693,000
Beginning of the period at Mar. 31, 2018	(9,218)	$ 43	257,297	16	(266,574)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	10,465		10,465
Issuance of common stock upon exercise of stock options (in shares)		328,000
Issuance of common stock upon exercise of stock options	3,317		3,317
Issuance of restricted stock units (in shares)		64,000
Tax withholding related to net share settlements of stock-based compensation awards (in shares)		(23,000)
Tax withholding related to net share settlements of stock-based compensation awards	(519)		(519)
Net loss	(21,768)				(21,768)
Other comprehensive income (loss)	59			59
End of period at Jun. 30, 2018	(17,664)	$ 43	270,560	75	(288,342)
Shares, Outstanding, Ending at Jun. 30, 2018		43,062,000
Shares, Outstanding, Beginning at Dec. 31, 2018		44,044,000
Beginning of the period at Dec. 31, 2018	(9,740)	$ 44	297,145	98	(307,027)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	8,193		8,193
Issuance of common stock upon exercise of stock options (in shares)		961,000
Issuance of common stock upon exercise of stock options	11,055	$ 1	11,054
Issuance of common stock under employee stock purchase plan (in shares)		101,000
Issuance of common stock under employee stock purchase plan	2,149		2,149
Issuance of restricted stock units (in shares)		25,000
Tax withholding related to net share settlements of stock-based compensation awards (in shares)		(10,000)
Tax withholding related to net share settlements of stock-based compensation awards	(390)		(390)
Net loss	(7,463)				(7,463)
Other comprehensive income (loss)	52			52
End of period at Mar. 31, 2019	3,856	$ 45	318,151	150	(314,490)
Shares, Outstanding, Ending at Mar. 31, 2019		45,121,000
Shares, Outstanding, Beginning at Dec. 31, 2018		44,044,000
Beginning of the period at Dec. 31, 2018	$ (9,740)	$ 44	297,145	98	(307,027)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)	1,416,176
Net loss	$ (15,785)
Other comprehensive income (loss)	134
End of period at Jun. 30, 2019	9,627	$ 46	332,161	232	(322,812)
Shares, Outstanding, Ending at Jun. 30, 2019		45,899,000
Shares, Outstanding, Beginning at Mar. 31, 2019		45,121,000
Beginning of the period at Mar. 31, 2019	3,856	$ 45	318,151	150	(314,490)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	8,513		8,513
Issuance of common stock upon exercise of stock options (in shares)		455,000
Issuance of common stock upon exercise of stock options	5,498	$ 1	5,497
Issuance of restricted stock units (in shares)		323,000
Net loss	(8,322)				(8,322)
Other comprehensive income (loss)	82			82
End of period at Jun. 30, 2019	$ 9,627	$ 46	$ 332,161	$ 232	$ (322,812)
Shares, Outstanding, Ending at Jun. 30, 2019		45,899,000

XML

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities
Net loss	$ (8,322)	$ (21,768)	$ (15,785)	$ (31,386)
Adjustments to reconcile net loss to net cash provided by operating activities
Depreciation and amortization	971	876	1,874	1,748
Stock-based compensation expense	8,513	10,465	16,706	16,370
Provision for doubtful accounts	233	139	46	183
(Accretion) amortization of premiums and discounts on marketable securities, net	(23)	(15)	(104)	3
Deferred income tax	(28)	0	(46)	0
Changes in assets and liabilities:
Accounts receivable	3,133	(236)	17,951	6,306
Deferred commissions	(3,833)	(2,020)	(5,862)	(3,669)
Operating lease right-of-use asset	556		1,224
Other receivables	161	148	(53)	175
Prepaid expenses and other	(310)	(2,020)	(3,546)	(1,789)
Other assets	58	(110)	(1,406)	(168)
Accounts payable	1,206	(1,294)	(356)	1,383
Deferred revenue	8,295	8,747	10,282	6,402
Operating lease liability	(813)		(1,468)
Accrued expenses and other liabilities	8,966	4,542	4,425	3,679
Net cash provided by (used in) operating activities	18,763	(2,546)	23,882	(763)
Cash flows from investing activities
Purchase of property and equipment	(454)	(210)	(2,197)	(219)
Purchase of marketable securities	(18,562)	(11,283)	(40,717)	(11,283)
Maturities of marketable securities	11,500	3,900	18,890	4,400
Purchase of intangible assets	(577)	(64)	(661)	(128)
Net cash used in investing activities	(8,093)	(7,657)	(24,685)	(7,230)
Cash flows from financing activities
Proceeds from option exercises	5,498	3,318	16,553	6,393
Taxes paid related to net share settlements of stock-based compensation awards	0	(519)	(390)	(1,861)
Proceeds from shares issued in connection with employee stock purchase plan	0	0	2,149	1,370
Principal payments on capital lease and financing obligations	(301)	(294)	(595)	(592)
Proceeds from government grants	0	22	0	22
Net cash provided by financing activities	5,197	2,527	17,717	5,332
Effect of foreign exchange rates on cash	110	(85)	215	(177)
Net increase (decrease) in cash and cash equivalents	15,977	(7,761)	17,129	(2,838)
Cash and cash equivalents at beginning of period	78,736	65,256	77,584	60,333
Cash and cash equivalents at end of period	94,713	57,495	94,713	57,495
Supplemental cash flow disclosure
Cash paid for interest	422	435	886	868
Cash paid for income taxes, net of refunds	28	54	261	56
Supplemental disclosure of noncash investing and financing activities
Allowance for tenant improvements	0	105	0	127
Purchases of property and equipment, accrued but not paid	$ 444	$ 254	$ 444	$ 254

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Organization and Significant Accounting Policies

6 Months Ended

Jun. 30, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization and Significant Accounting Policies

Organization and Significant Accounting Policies

Organization

Workiva Inc., a Delaware corporation, and its wholly-owned subsidiaries (the “Company” or “we” or “us”) is a leading provider of cloud-based solutions for connected reporting and compliance. Our platform, Wdesk, is used by thousands of public and private companies, government agencies and higher-education institutions. Wdesk offers controlled collaboration, data linking, data integrations, granular permissions, process management and a full audit trail. We sell to customers in the areas of: finance and accounting; risk and controls; regulatory reporting; financial close, management and performance reporting; and statutory and corporate tax reporting. Our operational headquarters are located in Ames, Iowa, with additional offices located in the United States, Europe, the Asia-Pacific region and Canada.

We updated our accounting policies on the use of estimates, impairment of long-lived assets and leases as a result of our adopting Financial Accounting Standards Board (FASB) guidance issued in accounting standards codification (ASC) 842, Leases, under the Accounting Standards Update (ASU) 2016-02 (collectively the new lease standard). Otherwise, there have been no changes to our significant accounting policies described in our Annual Report on Form 10-K for the year ended December 31, 2018, filed with the SEC on February 20, 2019, that have had a material impact on our condensed consolidated financial statements and related notes.

Basis of Presentation and Principles of Consolidation

The financial information presented in the accompanying unaudited condensed consolidated financial statements has been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) and in accordance with rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) regarding interim financial reporting. Accordingly, the financial statements do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. The condensed consolidated balance sheet data as of December 31, 2018 was derived from audited financial statements, but does not include all disclosures required by U.S. GAAP. In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all adjustments, consisting primarily of normal recurring accruals, necessary for a fair presentation of our financial position and results of operations. The operating results for the three and six months ended June 30, 2019 are not necessarily indicative of the results expected for the full year ending December 31, 2019.

Seasonality has affected our revenue, expenses and cash flows from operations. Revenue from professional services has been higher in the first quarter as many of our customers file their Form 10-K in the first calendar quarter. Sales and marketing expense has been higher in the third quarter due to our annual user conference in September. In addition, the timing of the payments of cash bonuses to employees during the first and fourth calendar quarters may result in some seasonality in operating cash flow. The condensed consolidated financial information should be read in conjunction with “Management’s Discussion and Analysis of Financial Condition and Results of Operations” contained in this report and the consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2018 filed with the SEC on February 20, 2019.

The unaudited condensed consolidated financial statements include the accounts of Workiva Inc. and its wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. Additionally, certain prior period amounts have been reclassified for consistency with the current year presentation. The reclassification of the prior period amounts were not material to the previously reported consolidated financial statements.

Use of Estimates

The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States requires us to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. We base our estimates on historical experience and various other assumptions believed to be reasonable. These estimates include, but are not limited to, the allowance for doubtful accounts, the determination of the relative selling prices of our services, the measurement of material rights, health insurance claims incurred but not yet reported, valuation of available-for-sale marketable securities, useful lives of deferred contract costs, intangible assets and property and equipment, income taxes, discount rates used in the valuation of right-of-use assets and lease liabilities, and certain assumptions used in the valuation of equity awards. While these estimates are based on our best knowledge of current events and actions that may affect us in the future, actual results may differ materially from these estimates.

Impairment of Long-Lived Assets

Long-lived assets, such as property, equipment, right-of-use assets and software and intangible assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset or asset group may not be recoverable. If circumstances require that a long-lived asset or asset group be tested for possible impairment, we first compare the undiscounted cash flows expected to be generated by that long-lived asset or asset group to its carrying amount. If the carrying amount of the long-lived asset or asset group is not recoverable on an undiscounted cash flow basis, an impairment is recognized to the extent that the carrying amount exceeds its fair value.

Leases

We determine if an arrangement is a lease at inception. Operating leases are included in operating lease right-of-use ("ROU") assets, other current liabilities, and operating lease liabilities on our condensed consolidated balance sheets. We currently have no finance leases.

ROU assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. Operating lease ROU assets and operating lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at the commencement date. Our variable lease payments consist of non-lease services related to the lease. Variable lease payments are excluded from the ROU assets and lease liabilities and are recognized in the period in which the obligation for those payments is incurred. As our leases do not provide an implicit rate, we use our incremental borrowing rate based on the information available at the commencement date in determining the present value of lease payments. The operating lease ROU asset also includes any lease payments made and excludes lease incentives incurred. Our lease terms may include options to extend or terminate the lease when it is reasonably certain that we will exercise that option. Lease expense for minimum lease payments is recognized on a straight-line basis over the lease term.

We have lease agreements with lease and non-lease components. We have elected to account for these lease and non-lease components as a single lease component. We are also electing not to apply the recognition requirements to short-term leases of 12 months or less and instead will recognize lease payments as expense on a straight-line basis over the lease term.

Recently Adopted Accounting Pronouncements

In February 2016, the Financial Accounting Standards Board ("FASB") issued guidance codified in ASC 842, Leases, which supersedes the guidance in former ASC 840, Leases, to increase transparency and comparability among organizations by requiring recognition of right-of-use assets and lease liabilities on the balance sheet and disclosure of key information about leasing arrangements (with the exception of short-term leases).

In July 2018, the FASB issued an update (ASU 2018-11) to the existing transition guidance that allows entities to recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. Effective January 1, 2019, we adopted ASC 842 using this new transition guidance. The comparative information has not been restated and continues to be reported under the accounting standard in effect for those periods.

We have elected to use the package of practical expedients, which allows us to not (1) reassess whether any expired or existing contracts are considered or contain leases; (2) reassess the lease classification for any expired or existing leases; and (3) reassess the initial direct costs for any existing leases. We did not elect the hindsight practical expedient, which permits entities to use hindsight in determining the lease term and assessing impairment.

Adoption of the new standard had a material impact on our condensed consolidated balance sheets. The most significant impacts related to the recognition of right-of-use assets and lease liabilities for operating leases. The adoption of ASC 842 had no impact on our condensed consolidated statements of operations or total cash flows from operations.

The cumulative effect of the changes made to our consolidated January 1, 2019 balance sheet for the adoption of ASC 842 were as follows (in thousands):

	As of December 31, 2018		Adjustments due to ASC 842 adoption		As of January 1, 2019
Assets
Operating right-of-use asset	$	—	$	15,694	$	15,694
Liabilities
Accrued expenses and other current liabilities	36,353		2,319		38,672
Other long-term liabilities	6,891		(6,007)		884
Operating lease liabilities, non-current	—		19,382		19,382

In August 2018, the FASB issued ASU 2018-15, Intangibles - Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract, which clarifies the accounting for implementation costs in cloud computing arrangements. The update will become effective for interim and annual periods beginning after December 15, 2019 and may be adopted either retrospectively or prospectively. Early adoption is permitted. We adopted this standard prospectively effective April 1, 2019. The adoption of this new guidance did not have a material impact on our consolidated financial statements.

New Accounting Pronouncements Not Yet Adopted

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which amends the current accounting guidance and requires the measurement of all expected losses based on historical experience, current conditions and reasonable and supportable forecasts. For trade receivables, loans, and other financial instruments, we will be required to use a forward-looking expected loss model that reflects probable losses rather than the incurred loss model for recognizing credit losses. The standard will become effective for interim and annual periods beginning after December 15, 2019, with early adoption permitted. Application of the amendments is through a cumulative-effect adjustment to retained earnings as of the effective date. We plan to adopt this standard on the effective date and are currently evaluating the impact of this new standard on our consolidated financial statements.

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Supplemental Consolidated Balance Sheet Information

6 Months Ended

Jun. 30, 2019

Payables and Accruals [Abstract]

Supplemental Consolidated Balance Sheet Information

Supplemental Consolidated Balance Sheet Information

Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consisted of the following (in thousands):

	As of June 30, 2019		As of December 31, 2018
Accrued vacation	$	7,947	$	6,906
Accrued commissions	5,372		7,265
Accrued bonuses	7,337		5,643
Estimated health insurance claims	1,170		1,100
ESPP employee contributions	2,797		2,156
Customer deposits	9,594		7,395
Operating lease liabilities	2,785		—
Accrued other liabilities	5,145		5,888
	$	42,147	$	36,353

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Cash Equivalents and Marketable Securities

6 Months Ended

Jun. 30, 2019

Investments, Debt and Equity Securities [Abstract]

Cash Equivalents and Marketable Securities

Cash Equivalents and Marketable Securities

At June 30, 2019, marketable securities consisted of the following (in thousands):

	Amortized Cost		Unrealized Gains		Unrealized Losses		Aggregate Fair Value
Money market funds	$	71,937	$	—	$	—	$	71,937
U.S. treasury debt securities	3,931		5		—		3,936
U.S. corporate debt securities	38,833		97		(11)		38,919
	$	114,701	$	102	$	(11)	$	114,792
Included in cash and cash equivalents	$	71,937	$	—	$	—	$	71,937
Included in marketable securities	$	42,764	$	102	$	(11)	$	42,855

At December 31, 2018, marketable securities consisted of the following (in thousands):

	Amortized Cost		Unrealized Gains		Unrealized Losses		Aggregate Fair Value
Money market funds	$	52,068	$	—	$	—	$	52,068
Commercial paper	7,448		—		—		7,448
U.S. treasury debt securities	2,494		—		(1)		2,493
U.S. corporate debt securities	10,890		—		(67)		10,823
	$	72,900	$	—	$	(68)	$	72,832
Included in cash and cash equivalents	$	52,068	$	—	$	—	$	52,068
Included in marketable securities	$	20,832	$	—	$	(68)	$	20,764

The following table presents gross unrealized losses and fair values for those marketable securities that were in an unrealized loss position as of June 30, 2019, aggregated by investment category and the length of time that individual securities have been in a continuous loss position (in thousands):

	As of June 30, 2019
	Less than 12 months				12 months or greater
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
U.S. treasury debt securities	$	—	$	—	$	—	$	—
U.S. corporate debt securities	996		(1)		3,494		(10)
Total	$	996	$	(1)	$	3,494	$	(10)

We do not believe any of the unrealized losses represented an other-than-temporary impairment based on our evaluation of available evidence, which includes our intent as of June 30, 2019 to hold these investments until the cost basis is recovered.

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Fair Value Measurements

6 Months Ended

Jun. 30, 2019

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

We determine the fair values of our financial instruments based on the fair value hierarchy, which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The fair value assumes that the transaction to sell the asset or transfer the liability occurs in the principal or most advantageous market for the asset or liability and establishes that the fair value of an asset or liability shall be determined based on the assumptions that market participants would use in pricing the asset or liability. The classification of a financial asset or liability within the hierarchy is based upon the lowest level input that is significant to the fair value measurement. The fair value hierarchy prioritizes the inputs into three levels that may be used to measure fair value:

Level 1 - Inputs are unadjusted quoted prices in active markets for identical assets or liabilities.

Level 2 - Inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument.

Level 3 - Inputs are unobservable inputs based on our assumptions.

Financial Assets

Cash equivalents primarily consist of AAA-rated money market funds with overnight liquidity and no stated maturities. We classified cash equivalents as Level 1 due to the short-term nature of these instruments and measured the fair value based on quoted prices in active markets for identical assets.

When available, our marketable securities are valued using quoted prices for identical instruments in active markets. If we are unable to value our marketable securities using quoted prices for identical instruments in active markets, we value our investments using broker reports that utilize quoted market prices for comparable instruments. We validate, on a sample basis, the derived prices provided by the brokers by comparing their assessment of the fair values of our investments against the fair values of the portfolio balances of another third-party professional pricing service. As of June 30, 2019, all of our marketable securities were valued using quoted prices for comparable instruments in active markets and are classified as Level 2.

Based on our valuation of our money market funds and marketable securities, we concluded that they are classified in either Level 1 or Level 2, and we have no financial assets measured using Level 3 inputs. The following table presents information about our assets that are measured at fair value on a recurring basis using the above input categories (in thousands):

	Fair Value Measurements as of June 30, 2019						Fair Value Measurements as of December 31, 2018
Description	Total		Level 1		Level 2		Total		Level 1		Level 2
Money market funds	$	71,937	$	71,937	$	—	$	52,068	$	52,068	$	—
Commercial paper	—		—		—		7,448		—		7,448
U.S. treasury debt securities	3,936		—		3,936		2,493		—		2,493
U.S. corporate debt securities	38,919		—		38,919		10,823		—		10,823
	$	114,792	$	71,937	$	42,855	$	72,832	$	52,068	$	20,764
Included in cash and cash equivalents	$	71,937					$	52,068
Included in marketable securities	$	42,855					$	20,764

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Leases

6 Months Ended

Jun. 30, 2019

Leases [Abstract]

Leases

Leases

Operating Leases

We lease certain office and residential space under non-cancelable operating leases with various lease terms through June 2043. Leases with an initial term of 12 months or less are not recorded on the balance sheet; we recognize lease expense for these leases on a straight-line basis over the lease term. Certain office leases include one or more options to renew, with renewal terms that can extend the lease term from 3 to 5 years. The exercise of lease renewal options is at our sole discretion and is generally excluded from the lease term at lease inception. Our leases generally require us to pay a proportionate share of real estate taxes, insurance, common area maintenance, and other operating costs in addition to a base or fixed rent.

The components of lease expense were as follows (in thousands):

	Three months ended June 30, 2019		Six months ended June 30, 2019
Operating lease cost	$	839	$	1,764
Short-term lease cost	299		538
Variable lease cost	229		432
	$	1,367	$	2,734

Supplemental cash flow information related to leases was as follows (in thousands):

	Three months ended June 30, 2019		Six months ended June 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	1,119	$	2,080
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	$	—	$	2,033

Other supplemental information related to leases was as follows:

	As of June 30, 2019
Weighted Average Remaining Lease Term (in years)
Operating leases	8.0
Weighted Average Discount Rate
Operating leases	5.7	%

As of June 30, 2019, future estimated minimum lease payments under non-cancelable operating leases were as follows (in thousands):

	Operating Leases
Remainder of 2019	$	1,899
2020	4,200
2021	4,241
2022	3,872
2023	3,540
Thereafter	11,255
Total minimum lease payments	29,007
Less: Amount representing interest	(6,184)
Total	$	22,823

As of June 30, 2019, we did not have additional operating or financing leases that had not yet commenced.

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Commitments and Contingencies

6 Months Ended

Jun. 30, 2019

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Other Purchase Commitments

In June 2019, we entered into certain non-cancelable agreements with third-party providers for our use of cloud services in the ordinary course of business. Under these agreements, we are committed to purchase $0.9 million in fiscal year 2019, $1.7 million in fiscal year 2020, $1.7 million in fiscal year 2021, and $0.9 million in fiscal year 2022.

Litigation

From time to time we may become involved in legal proceedings or be subject to claims arising in the ordinary course of our business. We evaluate the development of legal matters on a regular basis and accrue a liability when we believe a loss is probable and the amount can be reasonably estimated. Although the results of litigation and claims cannot be predicted with certainty, we currently believe that the final outcome of any currently pending legal proceedings to which we are a party will not have a material adverse effect on our business, operating results, financial condition or cash flows. Regardless of the outcome, litigation can have an adverse impact on us because of defense and settlement costs, diversion of management resources and other factors.

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Stock-Based Compensation

6 Months Ended

Jun. 30, 2019

Share-based Payment Arrangement [Abstract]

Stock-Based Compensation

Stock-Based Compensation

We grant stock-based incentive awards to attract, motivate and retain qualified employees, non-employee directors and consultants, and to align their financial interests with those of our stockholders. We utilize stock-based compensation in the form of restricted stock awards, restricted stock units, options to purchase Class A common stock and Employee Stock Purchase Plan (“ESPP”) purchase rights.

As of June 30, 2019, awards outstanding under the 2009 Plan consisted of stock options, and awards outstanding under the 2014 Plan consisted of stock options and restricted stock units.

As of June 30, 2019, 2,381,097 shares of Class A common stock were available for grant under the 2014 Plan.

Our ESPP became effective on June 13, 2017. Under the ESPP, eligible employees are granted options to purchase shares of Class A common stock at the lower of 85% of the fair market value of the stock at the time of grant or 85% of the fair market value at the time of exercise. Options to purchase shares are granted twice yearly on or about January 15 and July 15 and are exercisable on or about the succeeding July 14 and January 14, respectively, of each year. As of June 30, 2019, 4,719,674 shares of Class A common stock were available for issuance under the ESPP. No participant may purchase more than $12,500 worth of common stock in a six-month offering period.

Stock-Based Compensation Expense

Stock-based compensation expense was recorded in the following cost and expense categories consistent with the respective employee or service provider’s related cash compensation (in thousands):

	Three months ended June 30,				Six months ended June 30,
	2019		2018		2019		2018
Cost of revenue
Subscription and support	$	399	$	228	$	756	$	399
Professional services	431		146		840		296
Operating expenses
Research and development	1,851		1,495		3,751		2,516
Sales and marketing	2,032		1,440		3,996		2,553
General and administrative	3,800		7,156		7,363		10,606
Total	$	8,513	$	10,465	$	16,706	$	16,370

Stock Options

The following table summarizes the option activity under the Plans for the six months ended June 30, 2019:

	Options	Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value
					(in thousands)
Outstanding at December 31, 2018	6,400,175	$	13.65	6.1	$	142,340
Granted	—	—
Forfeited	(26,160)	17.66
Exercised	(1,416,176)	11.69
Outstanding at June 30, 2019	4,957,839	$	14.19	5.9	$	217,653
Exercisable at June 30, 2019	4,047,243	$	13.59	5.6	$	180,085

Options to purchase Class A common stock generally vest over a three- or four-year period and are generally granted for a term of ten years. The total intrinsic value of options exercised during the six months ended June 30, 2019 and 2018 was $53.3 million and $8.7 million, respectively.

No options were granted during the six months ended June 30, 2019 and 2018. The total fair value of options vested during the six months ended June 30, 2019 and 2018 was approximately $3.9

million and $8.4 million, respectively. Total unrecognized compensation expense of $5.6 million related to options will be recognized over a weighted-average period of 1.7 years.

Restricted Stock Units

Restricted stock units granted to employees generally vest over a three- or four-year period in equal, annual installments or with three-year cliff vesting. Restricted stock units granted to non-employee members of our Board of Directors generally have one-year cliff vesting from the date of grant. The recipient of a restricted stock unit award under the Plan will have no rights as a stockholder until share certificates are issued by us, but, at the discretion of our Compensation Committee, has the right to receive a dividend equivalent payment in the form of additional restricted stock units. Additionally, until the shares are issued, they have no voting rights and may not be bought or sold. The fair value for restricted stock units is calculated based on the stock price on the date of grant. The total fair value of restricted stock units vested during the six months ended June 30, 2019 and 2018 was approximately $6.3 million and $7.2 million, respectively.

The following table summarizes the restricted stock unit activity under the Plan for the six months ended June 30, 2019:

	Number of Shares	Weighted- Average Grant Date Fair Value
Unvested at December 31, 2018	2,359,261	$	23.95
Granted	800,726	42.12
Forfeited	(54,893)	27.39
Vested(1)	(324,749)	19.52
Unvested at June 30, 2019	2,780,345	$	29.63

(1) As of June 30, 2019, recipients of 250,750 shares had elected to defer settlement of the vested restricted stock units in accordance with our Nonqualified Deferred Compensation Plan resulting in total deferred units of 531,292 as of June 30, 2019. 

Compensation expense associated with unvested restricted stock units is recognized on a straight-line basis over the vesting period. At June 30, 2019, there was approximately $60.6 million of total unrecognized compensation expense related to restricted stock units, which is expected to be recognized over a weighted-average period of 2.5 years.

Employee Stock Purchase Plan

The fair value of each share issued under the ESPP is estimated on the date of grant using the Black-Scholes option-pricing model. Expected volatility is based on the historical volatility of our common stock. The expected term represents the period of time the ESPP purchase rights are expected to be outstanding. The expected term for the ESPP purchase rights approximates the offering period. The risk-free interest rate is based on yields on U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) with a maturity similar to the estimated expected term of the ESPP purchase rights.

The fair value of our ESPP purchase rights was estimated assuming no expected dividends and the following weighted-average assumptions:

	Six months ended June 30,
	2019	2018
Expected term (in years)	0.5	0.5
Risk-free interest rate	2.6%	1.8%
Expected volatility	48.6%	22.2%

There were no grants made pursuant to the ESPP during the three months ended June 30, 2019 and 2018. During the six months ended June 30, 2019, 100,949 shares of common stock were purchased under the ESPP at a weighted-average price of $21.29 per share, resulting in cash proceeds of $2.1 million.

Compensation expense associated with ESPP purchase rights is recognized on a straight-line basis over the vesting period. At June 30, 2019, there was approximately $65,000 of total unrecognized compensation expense related to the ESPP, which is expected to be recognized over a weighted-average period of 0.03 years.

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Revenue Recognition

6 Months Ended

Jun. 30, 2019

Revenue from Contract with Customer [Abstract]

Revenue Recognition

Revenue Recognition

Disaggregation of Revenue

The following table presents our revenues disaggregated by industry (in thousands). Certain prior year amounts have been reclassified to conform with current period presentation. These reclassifications have no impact on total revenue.

	Three months ended June 30,				Six months ended June 30,
	2019		2018		2019		2018
Information technology	$	10,001	$	7,786	$	19,163	$	15,145
Consumer discretionary	8,329		6,819		16,308		13,670
Industrials	8,212		6,944		16,004		13,816
Diversified financials	8,263		6,453		15,701		13,351
Banks	6,945		5,741		13,623		11,584
Healthcare	6,930		5,095		13,514		10,439
Energy	5,446		4,646		11,090		9,498
Other	19,358		15,646		38,044		31,533
Total revenues	$	73,484	$	59,130	$	143,447	$	119,036

The following table presents our revenues disaggregated by type of good or service (in thousands):

	Three months ended June 30,				Six months ended June 30,
	2019		2018		2019		2018
Subscription and support	$	60,472	$	48,837	$	116,595	$	95,307
XBRL professional services	9,522		6,916		20,932		16,768
Other services	3,490		3,377		5,920		6,961
Total revenues	$	73,484	$	59,130	$	143,447	$	119,036

Deferred Revenue

We recognized $51.6 million and $43.3 million of revenue during the three months ended June 30, 2019 and 2018, respectively, that was included in the deferred revenue balances at the beginning of the respective periods. We recognized $88.1 million and $77.0 million of revenue during the six months ended June 30, 2019 and 2018, respectively, that was included in the deferred revenue balances at the beginning of the respective periods.

Transaction Price Allocated to the Remaining Performance Obligations

As of June 30, 2019, we expect revenue of approximately $197.7 million to be recognized from remaining performance obligations for subscription contracts. We expect to recognize approximately $160.8 million of these remaining performance obligations over the next 12 months, with the balance recognized thereafter.

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Net Loss Per Share

6 Months Ended

Jun. 30, 2019

Earnings Per Share [Abstract]

Net Loss Per Share

Net Loss Per Share

Basic net loss per share is computed by dividing the net loss by the weighted-average number of shares of common stock outstanding during the period. Diluted net loss per share is computed by giving effect to all potential shares of common stock, including our outstanding stock options, stock related to unvested restricted stock units, and common stock issuable pursuant to the ESPP to the extent dilutive. Basic and diluted net loss per share was the same for each period presented, as the inclusion of all potential common shares outstanding would have been anti-dilutive.

The net loss per share is allocated based on the participation rights of the Class A and Class B common shares as if the loss for the year has been distributed. As the liquidation and dividend rights are identical, the net loss is allocated on a proportionate basis.

A reconciliation of the denominator used in the calculation of basic and diluted loss per share is as follows (in thousands, except share and per share data):

	Three months ended
	June 30, 2019				June 30, 2018
	Class A		Class B		Class A		Class B
Numerator
Net loss	$	(6,626)	$	(1,696)	$	(16,755)	$	(5,013)
Denominator
Weighted-average common shares outstanding - basic and diluted	36,758,866		9,407,794		33,278,982		9,955,673
Basic and diluted net loss per share	$	(0.18)	$	(0.18)	$	(0.50)	$	(0.50)

	Six months ended
	June 30, 2019				June 30, 2018
	Class A		Class B		Class A		Class B
Numerator
Net loss	$	(12,523)	$	(3,262)	$	(24,040)	$	(7,346)
Denominator
Weighted-average common shares outstanding - basic and diluted	36,255,515		9,445,044		32,972,720		10,075,390
Basic and diluted net loss per share	$	(0.35)	$	(0.35)	$	(0.73)	$	(0.73)

The anti-dilutive securities excluded from the weighted-average shares used to calculate the diluted net loss per common share were as follows:

	As of
	June 30, 2019	June 30, 2018
Shares subject to outstanding common stock options	4,957,839	7,415,412
Shares subject to unvested restricted stock units	2,780,345	2,046,275
Shares issuable pursuant to the ESPP	89,311	102,756

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Organization and Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

The financial information presented in the accompanying unaudited condensed consolidated financial statements has been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) and in accordance with rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) regarding interim financial reporting. Accordingly, the financial statements do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. The condensed consolidated balance sheet data as of December 31, 2018 was derived from audited financial statements, but does not include all disclosures required by U.S. GAAP. In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all adjustments, consisting primarily of normal recurring accruals, necessary for a fair presentation of our financial position and results of operations. The operating results for the three and six months ended June 30, 2019 are not necessarily indicative of the results expected for the full year ending December 31, 2019.

Principles of Consolidation

All intercompany accounts and transactions have been eliminated in consolidation.

Reclassifications

Additionally, certain prior period amounts have been reclassified for consistency with the current year presentation.

Use of Estimates

The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States requires us to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. We base our estimates on historical experience and various other assumptions believed to be reasonable. These estimates include, but are not limited to, the allowance for doubtful accounts, the determination of the relative selling prices of our services, the measurement of material rights, health insurance claims incurred but not yet reported, valuation of available-for-sale marketable securities, useful lives of deferred contract costs, intangible assets and property and equipment, income taxes, discount rates used in the valuation of right-of-use assets and lease liabilities, and certain assumptions used in the valuation of equity awards. While these estimates are based on our best knowledge of current events and actions that may affect us in the future, actual results may differ materially from these estimates.

Impairment of Long-Lived Assets

Long-lived assets, such as property, equipment, right-of-use assets and software and intangible assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset or asset group may not be recoverable. If circumstances require that a long-lived asset or asset group be tested for possible impairment, we first compare the undiscounted cash flows expected to be generated by that long-lived asset or asset group to its carrying amount. If the carrying amount of the long-lived asset or asset group is not recoverable on an undiscounted cash flow basis, an impairment is recognized to the extent that the carrying amount exceeds its fair value.

Leases

We determine if an arrangement is a lease at inception. Operating leases are included in operating lease right-of-use ("ROU") assets, other current liabilities, and operating lease liabilities on our condensed consolidated balance sheets. We currently have no finance leases.

ROU assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. Operating lease ROU assets and operating lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at the commencement date. Our variable lease payments consist of non-lease services related to the lease. Variable lease payments are excluded from the ROU assets and lease liabilities and are recognized in the period in which the obligation for those payments is incurred. As our leases do not provide an implicit rate, we use our incremental borrowing rate based on the information available at the commencement date in determining the present value of lease payments. The operating lease ROU asset also includes any lease payments made and excludes lease incentives incurred. Our lease terms may include options to extend or terminate the lease when it is reasonably certain that we will exercise that option. Lease expense for minimum lease payments is recognized on a straight-line basis over the lease term.

We have lease agreements with lease and non-lease components. We have elected to account for these lease and non-lease components as a single lease component. We are also electing not to apply the recognition requirements to short-term leases of 12 months or less and instead will recognize lease payments as expense on a straight-line basis over the lease term.

Recently Adopted Accounting Pronouncements and New Accounting Pronouncements Not Yet Adopted

Recently Adopted Accounting Pronouncements

In February 2016, the Financial Accounting Standards Board ("FASB") issued guidance codified in ASC 842, Leases, which supersedes the guidance in former ASC 840, Leases, to increase transparency and comparability among organizations by requiring recognition of right-of-use assets and lease liabilities on the balance sheet and disclosure of key information about leasing arrangements (with the exception of short-term leases).

In July 2018, the FASB issued an update (ASU 2018-11) to the existing transition guidance that allows entities to recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. Effective January 1, 2019, we adopted ASC 842 using this new transition guidance. The comparative information has not been restated and continues to be reported under the accounting standard in effect for those periods.

We have elected to use the package of practical expedients, which allows us to not (1) reassess whether any expired or existing contracts are considered or contain leases; (2) reassess the lease classification for any expired or existing leases; and (3) reassess the initial direct costs for any existing leases. We did not elect the hindsight practical expedient, which permits entities to use hindsight in determining the lease term and assessing impairment.

Adoption of the new standard had a material impact on our condensed consolidated balance sheets. The most significant impacts related to the recognition of right-of-use assets and lease liabilities for operating leases. The adoption of ASC 842 had no impact on our condensed consolidated statements of operations or total cash flows from operations.

The cumulative effect of the changes made to our consolidated January 1, 2019 balance sheet for the adoption of ASC 842 were as follows (in thousands):

	As of December 31, 2018		Adjustments due to ASC 842 adoption		As of January 1, 2019
Assets
Operating right-of-use asset	$	—	$	15,694	$	15,694
Liabilities
Accrued expenses and other current liabilities	36,353		2,319		38,672
Other long-term liabilities	6,891		(6,007)		884
Operating lease liabilities, non-current	—		19,382		19,382

In August 2018, the FASB issued ASU 2018-15, Intangibles - Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract, which clarifies the accounting for implementation costs in cloud computing arrangements. The update will become effective for interim and annual periods beginning after December 15, 2019 and may be adopted either retrospectively or prospectively. Early adoption is permitted. We adopted this standard prospectively effective April 1, 2019. The adoption of this new guidance did not have a material impact on our consolidated financial statements.

New Accounting Pronouncements Not Yet Adopted

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which amends the current accounting guidance and requires the measurement of all expected losses based on historical experience, current conditions and reasonable and supportable forecasts. For trade receivables, loans, and other financial instruments, we will be required to use a forward-looking expected loss model that reflects probable losses rather than the incurred loss model for recognizing credit losses. The standard will become effective for interim and annual periods beginning after December 15, 2019, with early adoption permitted. Application of the amendments is through a cumulative-effect adjustment to retained earnings as of the effective date. We plan to adopt this standard on the effective date and are currently evaluating the impact of this new standard on our consolidated financial statements.

Fair Value of Financial Instruments

Cash equivalents primarily consist of AAA-rated money market funds with overnight liquidity and no stated maturities. We classified cash equivalents as Level 1 due to the short-term nature of these instruments and measured the fair value based on quoted prices in active markets for identical assets. When available, our marketable securities are valued using quoted prices for identical instruments in active markets. If we are unable to value our marketable securities using quoted prices for identical instruments in active markets, we value our investments using broker reports that utilize quoted market prices for comparable instruments. We validate, on a sample basis, the derived prices provided by the brokers by comparing their assessment of the fair values of our investments against the fair values of the portfolio balances of another third-party professional pricing service.

Stock-based Compensation

The fair value of each share issued under the ESPP is estimated on the date of grant using the Black-Scholes option-pricing model. Expected volatility is based on the historical volatility of our common stock. The expected term represents the period of time the ESPP purchase rights are expected to be outstanding. The expected term for the ESPP purchase rights approximates the offering period. The risk-free interest rate is based on yields on U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) with a maturity similar to the estimated expected term of the ESPP purchase rights.

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Organization and Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of New Accounting Pronouncements and Changes in Accounting Principles

The cumulative effect of the changes made to our consolidated January 1, 2019 balance sheet for the adoption of ASC 842 were as follows (in thousands):

	As of December 31, 2018		Adjustments due to ASC 842 adoption		As of January 1, 2019
Assets
Operating right-of-use asset	$	—	$	15,694	$	15,694
Liabilities
Accrued expenses and other current liabilities	36,353		2,319		38,672
Other long-term liabilities	6,891		(6,007)		884
Operating lease liabilities, non-current	—		19,382		19,382

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Supplemental Consolidated Balance Sheet Information (Tables)

6 Months Ended

Jun. 30, 2019

Payables and Accruals [Abstract]

Schedule of Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consisted of the following (in thousands):

	As of June 30, 2019		As of December 31, 2018
Accrued vacation	$	7,947	$	6,906
Accrued commissions	5,372		7,265
Accrued bonuses	7,337		5,643
Estimated health insurance claims	1,170		1,100
ESPP employee contributions	2,797		2,156
Customer deposits	9,594		7,395
Operating lease liabilities	2,785		—
Accrued other liabilities	5,145		5,888
	$	42,147	$	36,353

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Cash Equivalents and Marketable Securities (Tables)

6 Months Ended

Jun. 30, 2019

Investments, Debt and Equity Securities [Abstract]

Schedule of Marketable Securities

At June 30, 2019, marketable securities consisted of the following (in thousands):

	Amortized Cost		Unrealized Gains		Unrealized Losses		Aggregate Fair Value
Money market funds	$	71,937	$	—	$	—	$	71,937
U.S. treasury debt securities	3,931		5		—		3,936
U.S. corporate debt securities	38,833		97		(11)		38,919
	$	114,701	$	102	$	(11)	$	114,792
Included in cash and cash equivalents	$	71,937	$	—	$	—	$	71,937
Included in marketable securities	$	42,764	$	102	$	(11)	$	42,855

At December 31, 2018, marketable securities consisted of the following (in thousands):

	Amortized Cost		Unrealized Gains		Unrealized Losses		Aggregate Fair Value
Money market funds	$	52,068	$	—	$	—	$	52,068
Commercial paper	7,448		—		—		7,448
U.S. treasury debt securities	2,494		—		(1)		2,493
U.S. corporate debt securities	10,890		—		(67)		10,823
	$	72,900	$	—	$	(68)	$	72,832
Included in cash and cash equivalents	$	52,068	$	—	$	—	$	52,068
Included in marketable securities	$	20,832	$	—	$	(68)	$	20,764

Schedule of Cash and Cash Equivalents

At June 30, 2019, marketable securities consisted of the following (in thousands):

	Amortized Cost		Unrealized Gains		Unrealized Losses		Aggregate Fair Value
Money market funds	$	71,937	$	—	$	—	$	71,937
U.S. treasury debt securities	3,931		5		—		3,936
U.S. corporate debt securities	38,833		97		(11)		38,919
	$	114,701	$	102	$	(11)	$	114,792
Included in cash and cash equivalents	$	71,937	$	—	$	—	$	71,937
Included in marketable securities	$	42,764	$	102	$	(11)	$	42,855

At December 31, 2018, marketable securities consisted of the following (in thousands):

	Amortized Cost		Unrealized Gains		Unrealized Losses		Aggregate Fair Value
Money market funds	$	52,068	$	—	$	—	$	52,068
Commercial paper	7,448		—		—		7,448
U.S. treasury debt securities	2,494		—		(1)		2,493
U.S. corporate debt securities	10,890		—		(67)		10,823
	$	72,900	$	—	$	(68)	$	72,832
Included in cash and cash equivalents	$	52,068	$	—	$	—	$	52,068
Included in marketable securities	$	20,832	$	—	$	(68)	$	20,764

Schedule of Available-for-sale Securities, Continuous Unrealized Loss Position

The following table presents gross unrealized losses and fair values for those marketable securities that were in an unrealized loss position as of June 30, 2019, aggregated by investment category and the length of time that individual securities have been in a continuous loss position (in thousands):

	As of June 30, 2019
	Less than 12 months				12 months or greater
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
U.S. treasury debt securities	$	—	$	—	$	—	$	—
U.S. corporate debt securities	996		(1)		3,494		(10)
Total	$	996	$	(1)	$	3,494	$	(10)

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Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2019

Fair Value Disclosures [Abstract]

Schedule of Assets Measured on Recurring Basis

The following table presents information about our assets that are measured at fair value on a recurring basis using the above input categories (in thousands):

	Fair Value Measurements as of June 30, 2019						Fair Value Measurements as of December 31, 2018
Description	Total		Level 1		Level 2		Total		Level 1		Level 2
Money market funds	$	71,937	$	71,937	$	—	$	52,068	$	52,068	$	—
Commercial paper	—		—		—		7,448		—		7,448
U.S. treasury debt securities	3,936		—		3,936		2,493		—		2,493
U.S. corporate debt securities	38,919		—		38,919		10,823		—		10,823
	$	114,792	$	71,937	$	42,855	$	72,832	$	52,068	$	20,764
Included in cash and cash equivalents	$	71,937					$	52,068
Included in marketable securities	$	42,855					$	20,764

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Leases (Tables)

6 Months Ended

Jun. 30, 2019

Leases [Abstract]

Summary of Lease Expense Components, Supplemental Cash Flow Information and Other Information

The components of lease expense were as follows (in thousands):

	Three months ended June 30, 2019		Six months ended June 30, 2019
Operating lease cost	$	839	$	1,764
Short-term lease cost	299		538
Variable lease cost	229		432
	$	1,367	$	2,734

Supplemental cash flow information related to leases was as follows (in thousands):

	Three months ended June 30, 2019		Six months ended June 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	1,119	$	2,080
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	$	—	$	2,033

Other supplemental information related to leases was as follows:

	As of June 30, 2019
Weighted Average Remaining Lease Term (in years)
Operating leases	8.0
Weighted Average Discount Rate
Operating leases	5.7	%

Summary of Future Estimated Minimum Lease Payments

As of June 30, 2019, future estimated minimum lease payments under non-cancelable operating leases were as follows (in thousands):

	Operating Leases
Remainder of 2019	$	1,899
2020	4,200
2021	4,241
2022	3,872
2023	3,540
Thereafter	11,255
Total minimum lease payments	29,007
Less: Amount representing interest	(6,184)
Total	$	22,823

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Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2019

Share-based Payment Arrangement [Abstract]

Schedule of Stock-based Compensation Expense

Stock-based compensation expense was recorded in the following cost and expense categories consistent with the respective employee or service provider’s related cash compensation (in thousands):

	Three months ended June 30,				Six months ended June 30,
	2019		2018		2019		2018
Cost of revenue
Subscription and support	$	399	$	228	$	756	$	399
Professional services	431		146		840		296
Operating expenses
Research and development	1,851		1,495		3,751		2,516
Sales and marketing	2,032		1,440		3,996		2,553
General and administrative	3,800		7,156		7,363		10,606
Total	$	8,513	$	10,465	$	16,706	$	16,370

Schedule of Stock-Option Activity

The following table summarizes the option activity under the Plans for the six months ended June 30, 2019:

	Options	Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value
					(in thousands)
Outstanding at December 31, 2018	6,400,175	$	13.65	6.1	$	142,340
Granted	—	—
Forfeited	(26,160)	17.66
Exercised	(1,416,176)	11.69
Outstanding at June 30, 2019	4,957,839	$	14.19	5.9	$	217,653
Exercisable at June 30, 2019	4,047,243	$	13.59	5.6	$	180,085

Summary of Restricted Stock Units

The following table summarizes the restricted stock unit activity under the Plan for the six months ended June 30, 2019:

	Number of Shares	Weighted- Average Grant Date Fair Value
Unvested at December 31, 2018	2,359,261	$	23.95
Granted	800,726	42.12
Forfeited	(54,893)	27.39
Vested(1)	(324,749)	19.52
Unvested at June 30, 2019	2,780,345	$	29.63

(1) As of June 30, 2019, recipients of 250,750 shares had elected to defer settlement of the vested restricted stock units in accordance with our Nonqualified Deferred Compensation Plan resulting in total deferred units of 531,292 as of June 30, 2019.

Schedule of Valuation Assumptions, Employee Stock Purchase Plans

The fair value of our ESPP purchase rights was estimated assuming no expected dividends and the following weighted-average assumptions:

	Six months ended June 30,
	2019	2018
Expected term (in years)	0.5	0.5
Risk-free interest rate	2.6%	1.8%
Expected volatility	48.6%	22.2%

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Revenue Recognition (Tables)

6 Months Ended

Jun. 30, 2019

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following table presents our revenues disaggregated by industry (in thousands). Certain prior year amounts have been reclassified to conform with current period presentation. These reclassifications have no impact on total revenue.

	Three months ended June 30,				Six months ended June 30,
	2019		2018		2019		2018
Information technology	$	10,001	$	7,786	$	19,163	$	15,145
Consumer discretionary	8,329		6,819		16,308		13,670
Industrials	8,212		6,944		16,004		13,816
Diversified financials	8,263		6,453		15,701		13,351
Banks	6,945		5,741		13,623		11,584
Healthcare	6,930		5,095		13,514		10,439
Energy	5,446		4,646		11,090		9,498
Other	19,358		15,646		38,044		31,533
Total revenues	$	73,484	$	59,130	$	143,447	$	119,036

The following table presents our revenues disaggregated by type of good or service (in thousands):

	Three months ended June 30,				Six months ended June 30,
	2019		2018		2019		2018
Subscription and support	$	60,472	$	48,837	$	116,595	$	95,307
XBRL professional services	9,522		6,916		20,932		16,768
Other services	3,490		3,377		5,920		6,961
Total revenues	$	73,484	$	59,130	$	143,447	$	119,036

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Net Loss Per Share (Tables)

6 Months Ended

Jun. 30, 2019

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

A reconciliation of the denominator used in the calculation of basic and diluted loss per share is as follows (in thousands, except share and per share data):

	Three months ended
	June 30, 2019				June 30, 2018
	Class A		Class B		Class A		Class B
Numerator
Net loss	$	(6,626)	$	(1,696)	$	(16,755)	$	(5,013)
Denominator
Weighted-average common shares outstanding - basic and diluted	36,758,866		9,407,794		33,278,982		9,955,673
Basic and diluted net loss per share	$	(0.18)	$	(0.18)	$	(0.50)	$	(0.50)

	Six months ended
	June 30, 2019				June 30, 2018
	Class A		Class B		Class A		Class B
Numerator
Net loss	$	(12,523)	$	(3,262)	$	(24,040)	$	(7,346)
Denominator
Weighted-average common shares outstanding - basic and diluted	36,255,515		9,445,044		32,972,720		10,075,390
Basic and diluted net loss per share	$	(0.35)	$	(0.35)	$	(0.73)	$	(0.73)

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The anti-dilutive securities excluded from the weighted-average shares used to calculate the diluted net loss per common share were as follows:

	As of
	June 30, 2019	June 30, 2018
Shares subject to outstanding common stock options	4,957,839	7,415,412
Shares subject to unvested restricted stock units	2,780,345	2,046,275
Shares issuable pursuant to the ESPP	89,311	102,756

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Organization and Significant Accounting Policies - Accounting Policies (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets	$ 16,510	$ 15,694
Accrued expenses and other current liabilities	42,147	38,672	$ 36,353
Other long-term liabilities	1,284	884	$ 6,891
Operating lease liabilities, non-current	$ 20,038	19,382
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets		15,694
Accrued expenses and other current liabilities		2,319
Other long-term liabilities		(6,007)
Operating lease liabilities, non-current		$ 19,382

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Supplemental Consolidated Balance Sheet Information - Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Accrued Liabilities and Other Liabilities [Abstract]
Accrued vacation	$ 7,947		$ 6,906
Accrued commissions	5,372		7,265
Accrued bonuses	7,337		5,643
Estimated health insurance claims	1,170		1,100
ESPP employee contributions	2,797		2,156
Customer deposits	9,594		7,395
Operating lease liabilities	2,785
Accrued other liabilities	5,145		5,888
Accrued expenses and other current liabilities	$ 42,147	$ 38,672	$ 36,353

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Cash Equivalents and Marketable Securities - Schedule of Marketable Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 94,713	$ 77,584
Debt Securities, Available-for-sale [Line Items]
Unrealized Gains	102	0
Unrealized Losses	(11)	(68)
Cash and cash equivalents and available-for-sale securities, amortized cost	114,701	72,900
Cash, cash equivalents, and available-for-sale securities	114,792	72,832
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		7,448
Unrealized Gains		0
Unrealized Losses		0
Aggregate Fair Value		7,448
U.S. treasury debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	3,931	2,494
Unrealized Gains	5	0
Unrealized Losses	0	(1)
Aggregate Fair Value	3,936	2,493
U.S. corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	38,833	10,890
Unrealized Gains	97	0
Unrealized Losses	(11)	(67)
Aggregate Fair Value	38,919	10,823
Money market funds
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	71,937	52,068
Cash and cash equivalents, aggregate fair value	71,937	52,068
Cash and cash equivalents
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	71,937	52,068
Cash and cash equivalents, aggregate fair value	71,937	52,068
Marketable securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	42,764	20,832
Unrealized Gains	102	0
Unrealized Losses	(11)	(68)
Aggregate Fair Value	$ 42,855	$ 20,764

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Cash Equivalents and Marketable Securities - Continuous Unrealized Loss Position (Details) $ in Thousands	Jun. 30, 2019 USD ($)
Fair Value
Less than 12 months	$ 996
12 months or greater	3,494
Unrealized Loss
Less than 12 months	(1)
12 months or greater	(10)
U.S. treasury debt securities
Fair Value
Less than 12 months	0
12 months or greater	0
Unrealized Loss
Less than 12 months	0
12 months or greater	0
U.S. corporate debt securities
Fair Value
Less than 12 months	996
12 months or greater	3,494
Unrealized Loss
Less than 12 months	(1)
12 months or greater	$ (10)

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Fair Value Measurements (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Cash and cash equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents - money market funds	$ 71,937	$ 52,068
Marketable securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	42,855	20,764
Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities		7,448
U.S. treasury debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	3,936	2,493
U.S. corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	38,919	10,823
Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents - money market funds	71,937	52,068
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	114,792	72,832
Recurring | Cash and cash equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents - money market funds	71,937	52,068
Recurring | Marketable securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	42,855	20,764
Recurring | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	7,448
Recurring | U.S. treasury debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	3,936	2,493
Recurring | U.S. corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	38,919	10,823
Recurring | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents - money market funds	71,937	52,068
Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	71,937	52,068
Recurring | Level 1 | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Recurring | Level 1 | U.S. treasury debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Recurring | Level 1 | U.S. corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Recurring | Level 1 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents - money market funds	71,937	52,068
Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	42,855	20,764
Recurring | Level 2 | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	7,448
Recurring | Level 2 | U.S. treasury debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	3,936	2,493
Recurring | Level 2 | U.S. corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	38,919	10,823
Recurring | Level 2 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents - money market funds	$ 0	$ 0

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Leases (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($) renewal_option
Lessee, Lease, Description [Line Items]
Number of renewal options (or more) | renewal_option		1
Lease, Cost [Abstract]
Operating lease cost	$ 839	$ 1,764
Short-term lease cost	299	538
Variable lease cost	229	432
Total lease cost	1,367	2,734
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	1,119	2,080
Right-of-use assets obtained in exchange for lease obligations: Operating leases	$ 0	$ 2,033
Weighted Average Remaining Lease Term (in years) - Operating leases	8 years	8 years
Weighted Average Discount Rate - Operating leases	5.70%	5.70%
Operating Lease Liabilities, Payments Due [Abstract]
Remainder of 2019	$ 1,899	$ 1,899
2020	4,200	4,200
2021	4,241	4,241
2022	3,872	3,872
2023	3,540	3,540
Thereafter	11,255	11,255
Total minimum lease payments	29,007	29,007
Less: Amount representing interest	(6,184)	(6,184)
Total	$ 22,823	$ 22,823
Office | Minimum
Lessee, Lease, Description [Line Items]
Renewal term	3 years	3 years
Office | Maximum
Lessee, Lease, Description [Line Items]
Renewal term	5 years	5 years

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Commitments and Contingencies (Details) - Cloud Services Arrangement $ in Millions	Jun. 30, 2019 USD ($)
Unrecorded Unconditional Purchase Obligation [Line Items]
Purchase commitment due in remainder of fiscal year	$ 0.9
Purchase commitment due in 2020	1.7
Purchase commitment due in 2021	1.7
Purchase commitment due in 2022	$ 0.9

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Stock-Based Compensation - Narrative (Details) - USD ($)		6 Months Ended
	Jun. 13, 2017	Jun. 30, 2019
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock purchase offering period		6 months
Employee Stock Purchase Plan | Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant		4,719,674
Purchase price of common stock, percentage of fair market value	85.00%
Maximum stock purchase value per employee	$ 12,500
2014 Equity Incentive Plan | Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant		2,381,097

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Stock-Based Compensation - Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	$ 8,513	$ 10,465	$ 16,706	$ 16,370
Research and development
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	1,851	1,495	3,751	2,516
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	2,032	1,440	3,996	2,553
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	3,800	7,156	7,363	10,606
Subscription and support | Cost of revenue
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	399	228	756	399
Professional Services | Cost of revenue
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	$ 431	$ 146	$ 840	$ 296

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Stock-Based Compensation - Stock Options (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Options (in shares):
Outstanding beginning of the period (in shares)	6,400,175
Granted (in shares)	0	0
Forfeited (in shares)	(26,160)
Exercised (in shares)	(1,416,176)
Outstanding end of the period (in shares)	4,957,839		6,400,175
Exercisable (in shares)	4,047,243
Weighted-Average Exercise Price (in dollars per share):
Outstanding beginning of the period (in dollars per share)	$ 13.65
Granted (in dollars per share)	0
Forfeited (in dollars per share)	17.66
Exercised (in dollars per share)	11.69
Outstanding end of the period (in dollars per share)	14.19		$ 13.65
Exercisable (in dollars per share)	$ 13.59
Outstanding, weighted-average remaining contractual term (years)	5 years 10 months 24 days		6 years 1 month 6 days
Exercisable, weighted-average remaining contractual term (years)	5 years 7 months 6 days
Outstanding, aggregate intrinsic value	$ 217,653		$ 142,340
Exercisable, aggregate intrinsic value	180,085
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options exercised intrinsic value	53,300	$ 8,700
Options vested in period fair value	3,900	$ 8,400
Options unrecognized compensation expense	$ 5,600
Employee stock options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options unrecognized compensation expense, period for recognition (years)	1 year 8 months 12 days
Class A Common Stock | Employee stock options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Expiration period (years)	10 years
Minimum | Class A Common Stock | Employee stock options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Award vesting period (years)	3 years
Maximum | Class A Common Stock | Employee stock options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Award vesting period (years)	4 years

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Stock-Based Compensation - Restricted Stock Units (Details) - Restricted stock units - USD ($) $ / shares in Units, $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested in period, fair value	$ 6.3	$ 7.2
Number of Shares (in shares)
Unvested at beginning of period (in shares)	2,359,261
Granted (in shares)	800,726
Forfeited (in shares)	(54,893)
Vested (in shares)	(324,749)
Unvested at end of period (in shares)	2,780,345
Weighted- Average Grant Date Fair Value (in dollars per share)
Unvested at beginning of period (in dollars per share)	$ 23.95
Granted (in dollars per share)	42.12
Forfeited (in dollars per share)	27.39
Vested (in dollars per share)	19.52
Unvested at end of period (in dollars per share)	$ 29.63
Number of vested shares recipients elected to defer settlement (in shares)	531,292
Unrecognized compensation expense	$ 60.6
Unrecognized compensation expense, period for recognition (years)	2 years 6 months
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (years)	3 years
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (years)	4 years
Cliff-vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (years)	3 years
Cliff-vesting | Board of Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (years)	1 year
Deferred Settlement
Number of Shares (in shares)
Vested (in shares)	(250,750)

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Stock-Based Compensation - Employee Stock Purchase Plan (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds from shares issued in connection with employee stock purchase plan	$ 0	$ 0	$ 2,149	$ 1,370
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)			6 months	6 months
Risk-free interest rate (as percent)			2.60%	1.80%
Expected volatility (as percent)			48.60%	22.20%
Unrecognized compensation expense	$ 65		$ 65
Unrecognized compensation expense, period for recognition (years)			10 days
Class A Common Stock | Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued during period			100,949
Shares issued during period, weighted average price per share (in dollars per share)			$ 21.29
Proceeds from shares issued in connection with employee stock purchase plan			$ 2,100

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Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Total revenues	$ 73,484	$ 59,130	$ 143,447	$ 119,036
Subscription and support
Disaggregation of Revenue [Line Items]
Total revenues	60,472	48,837	116,595	95,307
XBRL professional services
Disaggregation of Revenue [Line Items]
Total revenues	9,522	6,916	20,932	16,768
Other services
Disaggregation of Revenue [Line Items]
Total revenues	3,490	3,377	5,920	6,961
Information technology
Disaggregation of Revenue [Line Items]
Total revenues	10,001	7,786	19,163	15,145
Consumer discretionary
Disaggregation of Revenue [Line Items]
Total revenues	8,329	6,819	16,308	13,670
Industrials
Disaggregation of Revenue [Line Items]
Total revenues	8,212	6,944	16,004	13,816
Diversified financials
Disaggregation of Revenue [Line Items]
Total revenues	8,263	6,453	15,701	13,351
Banks
Disaggregation of Revenue [Line Items]
Total revenues	6,945	5,741	13,623	11,584
Healthcare
Disaggregation of Revenue [Line Items]
Total revenues	6,930	5,095	13,514	10,439
Energy
Disaggregation of Revenue [Line Items]
Total revenues	5,446	4,646	11,090	9,498
Other
Disaggregation of Revenue [Line Items]
Total revenues	$ 19,358	$ 15,646	$ 38,044	$ 31,533

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Revenue Recognition - Deferred Revenue and Transaction Price Allocated to the Remaining Performance Obligations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue from Contract with Customer [Abstract]
Deferred revenue recognized	$ 51.6	$ 43.3	$ 88.1	$ 77.0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue expected to be recognized	$ 160.8		$ 160.8
Expected period of recognition	12 months		12 months

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Net Loss Per Share - Earnings Per Share Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Denominator
Weighted-average common shares outstanding - basic and diluted (in shares)	46,166,660	43,234,655	45,700,559	43,048,110
Basic and diluted net loss per share (in dollars per share)	$ (0.18)	$ (0.50)	$ (0.35)	$ (0.73)
Class A Common Stock
Numerator
Net loss	$ (6,626)	$ (16,755)	$ (12,523)	$ (24,040)
Denominator
Weighted-average common shares outstanding - basic and diluted (in shares)	36,758,866	33,278,982	36,255,515	32,972,720
Basic and diluted net loss per share (in dollars per share)	$ (0.18)	$ (0.50)	$ (0.35)	$ (0.73)
Class B Common Stock
Numerator
Net loss	$ (1,696)	$ (5,013)	$ (3,262)	$ (7,346)
Denominator
Weighted-average common shares outstanding - basic and diluted (in shares)	9,407,794	9,955,673	9,445,044	10,075,390
Basic and diluted net loss per share (in dollars per share)	$ (0.18)	$ (0.50)	$ (0.35)	$ (0.73)

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Net Loss Per Share - Antidilutive Securities Excluded from Computation of Earnings Per Share (Details) - shares	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Shares subject to outstanding common stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	4,957,839	7,415,412
Shares subject to unvested restricted stock awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	2,780,345	2,046,275
Shares issuable pursuant to the ESPP
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	89,311	102,756

XML

Label	Element	Value
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 8,381,000
Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 8,381,000