Zulily (ZU) 10-Q 9 May 14 2014 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information Document and Entity Information	3 Months Ended
	Mar. 30, 2014	5-May-14	5-May-14
		Common Class A [Member]	Common Class B [Member]
Entity Information [Line Items]	'	'	'
Entity Registrant Name	'zulily, inc.	'	'
Entity Central Index Key	'0001478484	'	'
Current Fiscal Year End Date	'--12-28	'	'
Entity Filer Category	'Non-accelerated Filer	'	'
Document Type	'10-Q	'	'
Document Period End Date	30-Mar-14	'	'
Document Fiscal Year Focus	'2014	'	'
Document Fiscal Period Focus	'Q1	'	'
Amendment Flag	'false	'	'
Entity Common Stock, Shares Outstanding	'	19,361,598	104,794,492

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Mar. 30, 2014	Dec. 29, 2013
In Thousands, unless otherwise specified
CURRENT ASSETS:	'	'
Cash and cash equivalents	$256,417	$290,089
Short-term investments	53,009	18,014
Accounts receivable	10,161	5,176
Inventories	26,340	12,979
Prepaid expenses and other current assets	6,200	4,192
Total current assets	352,127	330,450
PROPERTY AND EQUIPMENT b Net	39,503	24,613
OTHER NON-CURRENT ASSETS	1,164	1,024
Total assets	392,794	356,087
CURRENT LIABILITIES:	'	'
Accounts payable	56,727	55,607
Accrued expenses	30,929	30,773
Deferred revenue	53,013	23,250
Total current liabilities	140,669	109,630
NON-CURRENT LIABILITIES	9,473	4,254
Total liabilities	150,142	113,884
COMMITMENTS AND CONTINGENCIES (Note 3 and Note 4)	'	'
STOCKHOLDERSb EQUITY	'	'
Preferred stock, $0.0001 par valueb2,000,000 shares authorized as of March 30, 2014 and December 29, 2013; zero issued and outstanding as of March 30, 2014 and December 29, 2013	0	0
Additional paid-in capital	290,792	287,385
Accumulated other comprehensive loss	-66	-58
Accumulated deficit	-48,086	-45,136
Total stockholdersb equity	242,652	242,203
Total liabilities and stockholders' equity	392,794	356,087
Class A Common Stock [Member]	'	'
STOCKHOLDERSb EQUITY	'	'
Common stock	1	1
Class B Common Stock [Member]	'	'
STOCKHOLDERSb EQUITY	'	'
Common stock	$11	$11

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parentheticals) (USD $)	Mar. 30, 2014	Dec. 29, 2013
Preferred Stock, Par Value Per Share	$0.00	$0.00
Preferred Stock, Shares Authorized	2,000,000	2,000,000
Preferred Stock, Shares Issued	0	0
Preferred Stock, Shares Outstanding	0	0
Common Stock, Par Value Per Share	$0.00	'
Common Stock, Shares Authorized	775,000,000	'
Class A Common Stock [Member]	'	'
Common Stock, Par Value Per Share	$0.00	$0.00
Common Stock, Shares Authorized	500,000,000	500,000,000
Common Stock, Shares, Issued	13,225,000	13,225,000
Common Stock, Shares, Outstanding	13,225,000	13,225,000
Class B Common Stock [Member]	'	'
Common Stock, Par Value Per Share	$0.00	$0.00
Common Stock, Shares Authorized	275,000,000	275,000,000
Common Stock, Shares, Issued	110,915,025	110,159,235
Common Stock, Shares, Outstanding	110,915,025	110,159,235
Common Stock, Shares Subject to Repurchase	22,136	82,682

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 30, 2014	Mar. 31, 2013
Income Statement [Abstract]	'	'
NET SALES	$237,881	$127,012
COST OF SALES	174,147	90,400
GROSS PROFIT	63,734	36,612
OPERATING EXPENSES:	'	'
Marketing	23,085	15,439
Selling, general, and administrative	43,600	22,786
TOTAL OPERATING EXPENSES	66,685	38,225
LOSS FROM OPERATIONS	-2,951	-1,613
INTEREST INCOME (EXPENSE)bNet	54	32
OTHER INCOME (EXPENSE)bNet	-53	-14
NET LOSS BEFORE PROVISION FOR INCOME TAXES	-2,950	-1,595
PROVISION FOR INCOME TAXES	0	0
NET LOSS	-2,950	-1,595
Net loss attributable to Class A and Class B common stockholders	($2,950)	($4,126)
Net loss per share attributable to Class A and Class B common stockholders:	'	'
Basic (in dollars per share)	($0.02)	($0.09)
Basic (in dollars per share)	($0.02)	($0.09)
Weighted average shares outstanding used to compute net loss attributable to Class A and Class B common stockholders:	'	'
Basic (in shares)	123,878,592	46,422,029
Diluted (in shares)	123,878,592	46,422,029

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Comprehensive Operations (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 30, 2014	Mar. 31, 2013
Statement of Comprehensive Income [Abstract]	'	'
Net loss	($2,950)	($1,595)
OTHER COMPREHENSIVE INCOME (LOSS):	'	'
Unrealized holding gains on available-for-sale securities	12	0
Foreign currency translation adjustment	-20	0
OTHER COMPREHENSIVE LOSS, NET	-8	0
TOTAL COMPREHENSIVE LOSS	($2,958)	($1,595)

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 30, 2014	Mar. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:	'	'
Net loss	($2,950)	($1,595)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:	'	'
Depreciation and amortization	2,401	1,167
Stock-based compensation	3,174	898
Loss on disposal of assets	105	10
Changes in operating assets and liabilities:	'	'
Accounts receivable	-4,984	-803
Inventories	-13,356	-2,389
Prepaid expenses and other assets	-2,100	-565
Accounts payable	-15	289
Accrued expenses and other liabilities	5,372	-135
Deferred revenue	29,759	6,632
Net cash provided by (used in) operating activities	17,406	3,509
CASH FLOWS FROM INVESTING ACTIVITIES:	'	'
Capital expenditures	-15,761	-2,905
Purchases of short-term and other investments	-59,996	-8,000
Proceeds from maturity and sale of short-term and other investments	25,000	8,000
Purchases of restricted cash	0	-1,800
Proceeds from maturity of restricted cash	0	1,881
Net cash provided by (used in) investing activities	-50,757	-2,824
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'
Proceeds from issuance of common stock	215	45
Payments of deferred offering costs	-385	0
Debt issuance costs	-149	0
Net cash (used in) provided by financing activities	-319	45
Effect of exchange rate changes on cash and cash equivalents	-2	14
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	-33,672	744
CASH AND CASH EQUIVALENTSbBeginning of period	290,089	96,998
CASH AND CASH EQUIVALENTSbEnd of period	256,417	97,742
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES:	'	'
Payable for capital purchases	1,898	190
Stock-based compensation capitalized	16	2
Deferred Debt Issuance Costs	3	0
Vesting of early exercised shares	3	2
Accretion of redeemable convertible preferred stock	$0	$2,531

Description_of_Business

Description of Business	3 Months Ended
	Mar. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Description of Business	'
	Description of Business
	zulily, inc. (the “Company”, "we", "us" or "our" ) is an online retailer offering customers a fun and entertaining shopping experience with a fresh selection of new product styles launched each day. Through the Company’s desktop and mobile sites and mobile applications, the Company helps its customers discover new and unique products at great values that they would likely not find elsewhere. The Company, a Delaware corporation formed in 2009, primarily conducts its buying, marketing and administrative functions in Seattle, Washington. The Company also operates a buying and studio office in Columbus, Ohio with fulfillment centers in McCarran, Nevada and Lockbourne, Ohio.
	Zulily U.K. Ltd. was incorporated in the United Kingdom in October 2011 and is a wholly owned subsidiary of zulily, inc. The principal corporate offices are located in London, England.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 30, 2014
Accounting Policies [Abstract]	'
Summary of Significant Accounting Policies	'
	Summary of Significant Accounting Policies
	Basis of Presentation—The consolidated balance sheet data as of December 29, 2013 was derived from audited financial statements. The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America ("GAAP") for unaudited condensed consolidated financial information. The financial information as of December 29, 2013 is derived from the Company's audited consolidated financial statements and notes included in Item 8 in the Company's Annual Report on Form 10-K for the fiscal year ended December 29, 2013 (the "2013 Form 10-K"), filed with the U.S. Securities and Exchange Commission on February 28, 2014. The financial information included in this Quarterly Report should be read in conjunction with management's discussion and analysis of financial condition and results of operations and the consolidated financial statements and notes included in the 2013 Form 10-K. Accordingly, we have omitted certain footnotes and other disclosures that are disclosed in the 2013 Form 10-K. The accompanying unaudited condensed consolidated financial statements reflect all adjustments consisting of normal recurring adjustments which, in the opinion of management, are necessary for a fair presentation of the Company's financial position and results of its operations, as of and for the periods presented. Operating results for the three months ended March 30, 2014 are not necessarily indicative of the results that may be expected for the fiscal year ending December 28, 2014, or for any other period.
	Principles of Consolidation—The accompanying condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiary, Zulily UK Ltd. All intercompany transactions and balances are eliminated in consolidation. Certain reclassifications have been made to the condensed consolidated financial statements in the prior period to conform to the current period presentation. Specifically, merchandise deposits are included in prepaid expenses and other current assets as of March 30, 2014 and December 29, 2013. As of December 29, 2013 we reclassified $0.5 million related to merchandise deposits to prepaid expenses and other current assets.
	Fiscal Year—In 2011, the Company adopted a retail calendar whereby the fiscal year ends on the Sunday closest to December 31. Each fiscal year consists of four 13-week quarters, with one extra week added in the fourth quarter every five to six years.
	Accounting Estimates—The preparation of condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. We base our estimates on historical experience and on various other assumptions that we believe to be reasonable under the circumstances, the result of which form the basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources. Actual results could differ materially from those estimates.
	Certain Risks and Concentrations—The Company maintains the majority of its cash and cash equivalents in accounts with major financial institutions within the United States, generally in the form of demand and money market accounts. Deposits in these institutions may exceed federally insured limits. The Company has not experienced any losses on its deposits of cash and cash equivalents.
	The Company is subject to certain risks and concentrations, including dependence on third-party technology providers and hosting services, exposure to risks associated with online commerce security, consumer credit risk, and credit card fraud, as well as the interpretation of state and local laws and regulations in regards to the collection and remittance of sales and use taxes and occupancy taxes. The Company also depends upon third-party service providers for processing customer orders.
	Recent Accounting Pronouncements—In July 2013, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update No. 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar tax Loss, or a Tax Credit Carryforward Exists ("ASU 2013-11). The amendments in this update require an unrecognized tax benefit, or a portion of an unrecognized tax benefit, to be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, except as follows: To the extent a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available at the reporting date under the tax law of the applicable jurisdiction to settle any additional income taxes that would result from the disallowance of a tax position or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. The assessment of whether a deferred tax asset is available is based on the unrecognized tax benefit and deferred tax asset that exist at the reporting date and should be made presuming disallowance of the tax position at the reporting date. The amendments in this update do not require new recurring disclosures. For public entities, ASU 2013-11 is effective for annual and interim periods beginning after December 15, 2013. The Company adopted ASU 2013-11 in the first quarter of 2014 and it did not have a material impact on our consolidated financial statements or related disclosures.

Commitments

Commitments	3 Months Ended
	Mar. 30, 2014
Commitments Disclosure [Abstract]	'
Commitments	'
	COMMITMENTS
	Fulfillment Center Lease
	In January 2014, the Company entered into a lease agreement for a fulfillment center being constructed in McCarran, Nevada. The initial term of the lease expires 12 years from the earlier of completion of the fulfillment center or the date we commence business operations from the leased property. The Company expects to begin operating the new fulfillment center in the third quarter of 2014. As part of the agreement, the Company issued a security deposit in the form of an irrevocable standby letter of credit totaling $3.0 million which expires in 2026. The standby letter of credit may be drawn if certain conditions occur, including default on payments, losses incurred due to breach or termination of the agreement.
	Credit Facility
	In January 2014, the Company entered into a $50.0 million revolving credit facility pursuant to a Credit Agreement with certain lenders (the "Credit Agreement"). Borrowings under the Credit Agreement will mature in January 2016. The Credit Agreement includes a letter of credit sub-limit of up to $15.0 million.
	Borrowings under the Credit Agreement bear interest, at the Company's option, in an amount equal to (i) in the case of base rate loans, 1.50% plus the highest of (a) the Federal Funds Rate plus one-half of one percent (0.50%), (b) the prime rate, and (c) the eurodollar rate plus two percent (2.00%), or (ii) in the case of eurodollar loans, for any interest period, LIBOR plus 2.50%. An undrawn commitment fee shall be payable to the lenders in an amount equal to 0.175% times the actual daily amount by which the aggregate commitments exceed the sum of the outstanding amount of loans and the outstanding amount of letter of credit obligations, calculated on a quarterly basis in arrears.
	The Credit Agreement contains customary representations and warranties and customary affirmative and negative covenants, in each case applicable to us and our subsidiaries. The negative covenants include restrictions on, among other things, indebtedness, liens, investments, mergers, dispositions, dividends and other distributions. The Credit Agreement contains certain financial covenants that require us and our subsidiaries to, among other things, maintain a specified fixed charge coverage ratio, quick ratio and a senior leverage ratio.
	The Credit Agreement includes customary events of default, including a change of control and a cross-default on our or any subsidiary’s material indebtedness. Our obligations under the Credit Agreement are secured by substantially all of our and our subsidiaries’ assets, and the Company’s obligations under the Credit Agreement will be guaranteed by certain of our subsequently acquired or organized direct and indirect domestic subsidiaries.
	During the three months ended March 30, 2014, the Company made no borrowings under the revolving credit facility.

Contingencies

Contingencies	3 Months Ended
	Mar. 30, 2014
Contingencies Disclosure [Abstract]	'
Contingencies	'
	CONTINGENCIES
	Legal Proceedings—In the ordinary course of business, the Company may be involved in various legal proceedings, lawsuits, disputes, or claims related to alleged infringement of third-party patents and other intellectual property rights, and commercial, employment, wage and hour, and other claims. We have been, and may in the future be, put on notice and/or sued by third parties for alleged infringement of their proprietary rights, including patent, trademark, and copyright infringement. The outcome of any such claim or litigation is inherently uncertain. Any claims against us, whether meritorious or not, could be time-consuming, result in costly litigation, damage our reputation, require significant amounts of management time and divert significant resources. Although the Company cannot predict the outcome of any such claims or litigation, it does not believe there are currently any such claims or litigation that, if resolved unfavorably, would have a material impact on the Company's financial condition, results of operations or cash flows.
	Sales Taxes—The Company believes that the likelihood of incurring a liability as a result of sales tax nexus being asserted by certain states where it does not currently collect sales tax reaches the threshold for reasonably possible; however, the Company is unable to estimate a potential outcome.

Stockholders_Equity

Stockholders' Equity	3 Months Ended
	Mar. 30, 2014
Equity [Abstract]	'
Stockholders' Equity	'
	STOCKHOLDERS’ EQUITY
	Preferred Stock
	The Company has 2,000,000 shares of undesignated preferred stock authorized for future issuance. Shares of preferred stock may be issued from time to time in one or more series with rights, preferences and privileges established by the Company's board of directors.
	Common Stock
	The Company's certificate of incorporation provides for two classes of common stock: Class A common stock and Class B common stock. Each holder of Class A common stock is entitled to one vote per share and each holder of Class B common stock is entitled to ten votes per share. Each share of Class B common stock may be converted into one share of Class A common stock at the option of its holder and are automatically converted upon transfer to Class A common stock, subject to certain limited exceptions. The Company's authorized Class A and Class B common stock consists of 775,000,000 shares, all with a par value of $0.0001 per share.
	In November 2013, the Company completed its initial public offering ("IPO") in which it issued and sold 7,334,125 shares of Class A common stock at a public offering price of $22.00 per share and the selling stockholders sold 5,890,875 shares of Class A common stock. The Company did not receive any proceeds from the sale of shares by the selling stockholders. The total net proceeds from the offering to the Company were $147.5 million after deducting the underwriting discounts and offering expenses totaling $3.3 million.
	Restricted Common Stock
	As of March 30, 2014, all 52,812,500 shares under restricted stock purchase agreements entered into with the Company's founders have fully vested. No amount of compensation expense has been recognized in connection with these shares, as they were deemed to have nominal value at the date of issuance.
	Stock-Based Compensation Expense
	A summary of option activity under the Company's stock option plans during the three months ended March 30, 2014 is presented below:
							Weighted
							Average
		Number of		Weighted			Remaining
		Shares		Average			Contractual	Total
		Underlying		Exercise			Term	Intrinsic
		Options		Price			(in Years)	Value
		(In thousands, except price, shares and years)
	Outstanding at December 29, 2013	13,938,487		$	7.4		8.56	$	462,558
	Granted	424,939		43.79
	Exercised	(755,790	)	0.28
	Canceled	(1,539	)	6.05
	Forfeited	(130,577	)	8.77
	Outstanding at March 30, 2014	13,475,520		$	8.94		8.46	$	580,009
	Vested and expected to vest at March 30, 2014	13,124,716		$	8.77		8.44	$	567,123
	Exercisable at March 30, 2014	9,255,777		$	6.93		8.25	$	416,845
	During the fiscal year ended January 1, 2012, the Company issued 1,439,627 Class B common shares for the exercise of stock options. Of this amount, 473,958 Class B common shares were early exercised and are subject to repurchase in accordance with the provision of the 2009 plan. The unvested portion of the early exercised shares as of March 30, 2014 and December 29, 2013, was 22,136 and 63,151, respectively. No repurchases of the early exercised Class B common shares have been made by the Company.
	As of March 30, 2014, total unrecognized compensation cost, adjusted for estimated forfeitures, related to unvested stock options was approximately $57.3 million and the weighted-average remaining vesting period was 5.43 years.
	The following table presents the effects of stock-based compensation on the condensed consolidated statements of operations during the periods presented:
		Three Months Ended
		30-Mar-14			31-Mar-13
		(in thousands)
	Cost of sales	$	22		$	14
	Marketing expenses	163			64
	Selling, general and administrative expenses	2,989			820
	Total stock-based compensation expense	$	3,174		$	898

Net_Income_Loss_Per_Share

Net Income Loss Per Share	3 Months Ended
	Mar. 30, 2014
Earnings Per Share [Abstract]	'
Net Income (Loss) Per Share	'
	NET LOSS PER SHARE
	Net loss per common share is presented using the two-class method required for participating securities. Concurrent with the closing of the IPO in November 2013, all shares of outstanding preferred stock automatically converted into 60,621,233 shares of the Company's Class B common stock. Prior to the IPO, we considered all holders of preferred stock to be participating securities as they were entitled to receive non-cumulative dividends. Additionally, we consider holders of unvested restricted common stock to be participating securities because of their non-forfeitable rights to dividends, in the event dividends are declared and paid.
	Following the completion of the Company's IPO in November 2013, Class A and Class B common stock are the only outstanding equity in the Company. The rights of the holders of Class A and Class B common stock are identical, except with respect to voting and conversion. Each share of Class A common stock is entitled to one vote per share and each share of Class B common stock is entitled to ten votes per share, on all matters that are subject to stockholder vote. Shares of Class B common stock may be converted into Class A common stock at any time at the option of the stockholder, and are automatically converted upon transfer to Class A common stock, subject to certain limited exceptions.
	Undistributed earnings allocated to participating securities are subtracted from net income in determining net income attributable to Class A and Class B common stockholders. Net losses are not allocated to the participating securities as holders of preferred stock and unvested restricted common stock do not have a contractual obligation to share in the losses of the Company. Undistributed earnings are calculated as net income (loss) less distributed earnings, accretion of convertible preferred stock, and current period convertible preferred stock non-cumulative dividends, whether or not declared. Basic net income (loss) per share is computed by dividing net income attributable to Class A and Class B common stockholders by the weighted-average number of shares of Class A and Class B common stock outstanding during the period.
	For the calculation of diluted net income (loss), net income attributable to Class A and Class B common stockholders for basic net income is adjusted by the effect of dilutive securities, including awards under our equity compensation plans. Diluted EPS attributable to Class A and Class B common stockholders is computed by dividing the resulting net income (loss) attributable to Class A and Class B common stockholders by the weighted-average number of fully diluted Class A and Class B common shares outstanding.
	For the quarter ended March 30, 2014 and March 31, 2013, the computation of basic and diluted net loss per share is presented on a combined basis for Class A and Class B common stock because the results are identical.
	The following table presents the calculation of basic and diluted net loss per common share:
		Three Months Ended
		30-Mar-14				31-Mar-13
		(in thousands, except per share amounts)
	Numerator
	Net loss	$	(2,950	)		$	(1,595	)
	Less: Accretion of convertible redeemable preferred stock	—				(2,531		)
	Net loss attributable to Class A and Class B common stockholders	$	(2,950	)		$	(4,126	)
	Denominator
	Weighted average shares used to compute basic net loss per Class A and Class B common share	123,878,592				46,422,029
	Effect of potentially dilutive securities:
	Stock options	—				—
	Unvested restricted common shares	—				—
	Convertible preferred shares	—				—
	Weighted average shares used to compute diluted net loss per Class A and Class B common share	123,878,592				46,422,029
	Net loss per share attributable to Class A and Class B common stockholders—basic	$	(0.02	)		$	(0.09	)
	Net loss per share attributable to Class A and Class B common stockholders—diluted	$	(0.02	)		$	(0.09	)
	The following have been excluded from the computation of diluted net loss per share attributable to Class A and Class B common stockholders as their effect would have been antidilutive:
		Three Months Ended
		30-Mar-14			31-Mar-13
	Convertible preferred shares	—			60,497,884
	Unvested restricted common shares	51,711			8,154,884
	Stock options	13,475,520			8,034,511
	Total	13,527,231			76,687,279

Segment_Information

Segment Information	3 Months Ended
	Mar. 30, 2014
Segment Reporting [Abstract]	'
Segment Information	'
	SEGMENT INFORMATION
	The Company has two reportable segments: North America and United Kingdom ("U.K.") The Company’s reportable segments have been identified based on how the Company’s chief operating decision maker manages the Company’s businesses, makes operating decisions, and evaluates operating performance. The Company’s chief operating decision maker is its chief executive officer. The Company evaluates the performance of its reportable segments based on net sales and loss from operations. Loss from operations represents net loss before interest income (expense), net, other income (expense), net and provision for income taxes. Management does not evaluate the performance of its reportable segments using asset measures.
	North America—The North America segment consists of amounts earned from retail and services sales through the Company’s North America-focused sites, including sales from the sites to customers in the United States, Canada and other foreign countries fulfilled through a third-party service provider.
	U.K.—The U.K. segment consists of amounts earned from retail and services sales through the Company’s U.K.-focused sites, including sales from the sites to customers in the United Kingdom and throughout Europe.
	Certain North America corporate-level activities are not allocated to the U.K. segment, including costs of marketing, human resources, legal, finance and technology.
	The Company accounts for intersegment sales in accordance with the underlying transfer pricing agreement between zulily, inc. and Zulily U.K. Ltd.
	Information on reportable segments and reconciliation to consolidated net loss before provision for income taxes is as follows:
		Three Months Ended
		30-Mar-14			31-Mar-13
		(in thousands)
	North America
	Net sales	$	234,360		$	124,324
	Operating (loss) income	(1,791		)	63
	Intersegment expense	(1,156		)	(1,709		)
	Total segment operating loss	(2,947		)	(1,646		)
	United Kingdom
	Net sales	3,521			2,688
	Intersegment sales	1,156			1,709
	Total net sales	4,677			4,397
	Segment operating (loss) income	$	(4	)	$	33
	Consolidated
	Net sales
	Total sales for reportable segments	$	239,037		$	128,721
	Elimination of intersegment sales	(1,156		)	(1,709		)
	Total consolidated net sales	$	237,881		$	127,012
	Net loss before provision for income taxes
	Total operating loss for reportable segments	$	(2,951	)	$	(1,613	)
	Interest income (expense)—net	54			32
	Other income (expense)—net	(53		)	(14		)
	Net loss before provision for income taxes	$	(2,950	)	$	(1,595	)
	The Company’s assets are primarily located in the United States. We sell similar products and services in each of our segments and revenue from external customers for each group of similar products and services are not reported to the Company’s chief operating decision maker.

Fair_Value_Measurements

Fair Value Measurements	3 Months Ended
	Mar. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	FAIR VALUE MEASUREMENTS
	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. To increase the comparability of fair value measures, the following hierarchy prioritizes the inputs to valuation methodologies used to measure fair value:
	Level 1—Quoted prices for identical assets and liabilities in active markets. The Company classifies cash equivalents as Level 1 in the fair value hierarchy. Cash equivalents are comprised of highly-liquid investments, including money market funds with original maturities of less than six months. The fair value measurement of these assets is based on quoted market prices in active markets and, therefore, these assets are recorded at fair value on a recurring basis.
	Level 2—Assets and liabilities valued based on observable market data for similar instruments, such as quoted prices for similar assets or liabilities or other inputs that are observable or can be corroborated by observable market data. The Company classifies restricted cash and short-term investments as Level 2 in the fair value hierarchy. Restricted cash is comprised of certificates of deposit funds with original maturities of less than three months. Short-term investments consist of commercial paper. The fair value measurement of these assets is based on observable market-based inputs or inputs that are derived principally from or corroborated by observable market data by correlation or other means.
	Level 3—Unobservable inputs reflecting the Company’s assumptions, consistent with reasonably available assumptions made by other market participants. These valuations require significant judgment. The Company does not have assets classified as Level 3 in the fair value hierarchy.
	The following tables summarize the Company's assets that are measured at fair value on a recurring basis, by level, within the fair value hierarchy as of March 30, 2014 and December 29, 2013:
		March 30, 2014
		Total		Level 1		Level 2		Level 3
		(in thousands)
	Cash equivalents:
	Money market funds	$	18,018	$	18,018	$	—	$	—
	Short-term investments:
	Commercial paper	53,009		—		53,009		—
	Total	$	71,027	$	18,018	$	53,009	$	—
		29-Dec-13
		Total		Level 1		Level 2		Level 3
		(in thousands)
	Cash equivalents:
	Money market funds	$	18,019	$	18,019	$	—	$	—
	Short-term investments:
	Commercial paper	18,014		—		18,014		—
	Total	$	36,033	$	18,019	$	18,014	$	—

Summary_of_Significant_Account1

Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 30, 2014
Accounting Policies [Abstract]	'
Principles of Consolidation	'
	The accompanying condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiary, Zulily UK Ltd. All intercompany transactions and balances are eliminated in consolidation. Certain reclassifications have been made to the condensed consolidated financial statements in the prior period to conform to the current period presentation.
Fiscal Year	'
	In 2011, the Company adopted a retail calendar whereby the fiscal year ends on the Sunday closest to December 31. Each fiscal year consists of four 13-week quarters, with one extra week added in the fourth quarter every five to six years.
Accounting Estimates	'
	The preparation of condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. We base our estimates on historical experience and on various other assumptions that we believe to be reasonable under the circumstances, the result of which form the basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources. Actual results could differ materially from those estimates.
Cash and Cash Equivalents	'
	The Company maintains the majority of its cash and cash equivalents in accounts with major financial institutions within the United States, generally in the form of demand and money market accounts.
Risks and Concentrations	'
	The Company is subject to certain risks and concentrations, including dependence on third-party technology providers and hosting services, exposure to risks associated with online commerce security, consumer credit risk, and credit card fraud, as well as the interpretation of state and local laws and regulations in regards to the collection and remittance of sales and use taxes and occupancy taxes. The Company also depends upon third-party service providers for processing customer orders.
Recent Accounting Pronouncements	'
	In July 2013, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update No. 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar tax Loss, or a Tax Credit Carryforward Exists ("ASU 2013-11). The amendments in this update require an unrecognized tax benefit, or a portion of an unrecognized tax benefit, to be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, except as follows: To the extent a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available at the reporting date under the tax law of the applicable jurisdiction to settle any additional income taxes that would result from the disallowance of a tax position or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. The assessment of whether a deferred tax asset is available is based on the unrecognized tax benefit and deferred tax asset that exist at the reporting date and should be made presuming disallowance of the tax position at the reporting date. The amendments in this update do not require new recurring disclosures. For public entities, ASU 2013-11 is effective for annual and interim periods beginning after December 15, 2013. The Company adopted ASU 2013-11 in the first quarter of 2014 and it did not have a material impact on our consolidated financial statements or related disclosures.

Stockholders_Equity_Tables

Stockholders' Equity (Tables)	3 Months Ended
	Mar. 30, 2014
Equity [Abstract]	'
Schedule of stock options activity	'
	A summary of option activity under the Company's stock option plans during the three months ended March 30, 2014 is presented below:
							Weighted
							Average
		Number of		Weighted			Remaining
		Shares		Average			Contractual	Total
		Underlying		Exercise			Term	Intrinsic
		Options		Price			(in Years)	Value
		(In thousands, except price, shares and years)
	Outstanding at December 29, 2013	13,938,487		$	7.4		8.56	$	462,558
	Granted	424,939		43.79
	Exercised	(755,790	)	0.28
	Canceled	(1,539	)	6.05
	Forfeited	(130,577	)	8.77
	Outstanding at March 30, 2014	13,475,520		$	8.94		8.46	$	580,009
	Vested and expected to vest at March 30, 2014	13,124,716		$	8.77		8.44	$	567,123
	Exercisable at March 30, 2014	9,255,777		$	6.93		8.25	$	416,845
Allocation of recognized period costs	'
	The following table presents the effects of stock-based compensation on the condensed consolidated statements of operations during the periods presented:
		Three Months Ended
		30-Mar-14			31-Mar-13
		(in thousands)
	Cost of sales	$	22		$	14
	Marketing expenses	163			64
	Selling, general and administrative expenses	2,989			820
	Total stock-based compensation expense	$	3,174		$	898

Net_Income_Loss_Per_Share_Tabl

Net Income Loss Per Share (Tables)	3 Months Ended
	Mar. 30, 2014
Earnings Per Share [Abstract]	'
Schedule of earnings per share calculation	'
	The following table presents the calculation of basic and diluted net loss per common share:
		Three Months Ended
		30-Mar-14				31-Mar-13
		(in thousands, except per share amounts)
	Numerator
	Net loss	$	(2,950	)		$	(1,595	)
	Less: Accretion of convertible redeemable preferred stock	—				(2,531		)
	Net loss attributable to Class A and Class B common stockholders	$	(2,950	)		$	(4,126	)
	Denominator
	Weighted average shares used to compute basic net loss per Class A and Class B common share	123,878,592				46,422,029
	Effect of potentially dilutive securities:
	Stock options	—				—
	Unvested restricted common shares	—				—
	Convertible preferred shares	—				—
	Weighted average shares used to compute diluted net loss per Class A and Class B common share	123,878,592				46,422,029
	Net loss per share attributable to Class A and Class B common stockholders—basic	$	(0.02	)		$	(0.09	)
	Net loss per share attributable to Class A and Class B common stockholders—diluted	$	(0.02	)		$	(0.09	)
Schedule of antidilutive securities excluded from computation of earnings per share	'
	The following have been excluded from the computation of diluted net loss per share attributable to Class A and Class B common stockholders as their effect would have been antidilutive:
		Three Months Ended
		30-Mar-14			31-Mar-13
	Convertible preferred shares	—			60,497,884
	Unvested restricted common shares	51,711			8,154,884
	Stock options	13,475,520			8,034,511
	Total	13,527,231			76,687,279

Segment_Information_Tables

Segment Information (Tables)	3 Months Ended
	Mar. 30, 2014
Segment Reporting [Abstract]	'
Schedule of Segment Reporting Information, by Segment	'
	Information on reportable segments and reconciliation to consolidated net loss before provision for income taxes is as follows:
		Three Months Ended
		30-Mar-14			31-Mar-13
		(in thousands)
	North America
	Net sales	$	234,360		$	124,324
	Operating (loss) income	(1,791		)	63
	Intersegment expense	(1,156		)	(1,709		)
	Total segment operating loss	(2,947		)	(1,646		)
	United Kingdom
	Net sales	3,521			2,688
	Intersegment sales	1,156			1,709
	Total net sales	4,677			4,397
	Segment operating (loss) income	$	(4	)	$	33
	Consolidated
	Net sales
	Total sales for reportable segments	$	239,037		$	128,721
	Elimination of intersegment sales	(1,156		)	(1,709		)
	Total consolidated net sales	$	237,881		$	127,012
	Net loss before provision for income taxes
	Total operating loss for reportable segments	$	(2,951	)	$	(1,613	)
	Interest income (expense)—net	54			32
	Other income (expense)—net	(53		)	(14		)
	Net loss before provision for income taxes	$	(2,950	)	$	(1,595	)

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value, Assets Measured on Recurring Basis	'
	The following tables summarize the Company's assets that are measured at fair value on a recurring basis, by level, within the fair value hierarchy as of March 30, 2014 and December 29, 2013:
		March 30, 2014
		Total		Level 1		Level 2		Level 3
		(in thousands)
	Cash equivalents:
	Money market funds	$	18,018	$	18,018	$	—	$	—
	Short-term investments:
	Commercial paper	53,009		—		53,009		—
	Total	$	71,027	$	18,018	$	53,009	$	—
		29-Dec-13
		Total		Level 1		Level 2		Level 3
		(in thousands)
	Cash equivalents:
	Money market funds	$	18,019	$	18,019	$	—	$	—
	Short-term investments:
	Commercial paper	18,014		—		18,014		—
	Total	$	36,033	$	18,019	$	18,014	$	—

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Details) (USD $)	Mar. 30, 2014	Dec. 29, 2013
In Thousands, unless otherwise specified
Reclassification of merchandise deposits to prepaid expenses and other current assets	$6,200	$4,192
Restatement Adjustment [Member]	'	'
Reclassification of merchandise deposits to prepaid expenses and other current assets	'	$500

Commitments_Commitments_Fulfil

Commitments Commitments - Fulfillment Center Lease (Details) (USD $)	1 Months Ended
In Millions, unless otherwise specified	Jan. 31, 2014
Loss Contingencies [Line Items]	'
Initial term of the lease	'12 years
Financial Standby Letter of Credit [Member]	'
Loss Contingencies [Line Items]	'
Security deposit	3

Commitments_Credit_Facility_De

Commitments - Credit Facility (Details) (USD $)	1 Months Ended
	Jan. 31, 2014
Revolving Credit Facility [Member]	'
Line of Credit Facility [Line Items]	'
Maximum borrowing capacity	$50,000,000
Undrawn commitment fee percentage	0.18%
Letter of Credit [Member]	'
Line of Credit Facility [Line Items]	'
Maximum borrowing capacity	$15,000,000
Base Rate [Member] | Revolving Credit Facility [Member]	'
Line of Credit Facility [Line Items]	'
Stated rate	1.50%
Federal Funds Rate [Member] | Revolving Credit Facility [Member]	'
Line of Credit Facility [Line Items]	'
Basis spread on variable rate	0.50%
Eurodollar [Member] | Revolving Credit Facility [Member]	'
Line of Credit Facility [Line Items]	'
Basis spread on variable rate	2.00%
London Interbank Offered Rate (LIBOR) [Member] | Revolving Credit Facility [Member]	'
Line of Credit Facility [Line Items]	'
Basis spread on variable rate	2.50%

Stockholders_Equity_Details

Stockholders' Equity (Details) (USD $)	3 Months Ended							1 Months Ended		3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013	Dec. 29, 2013	Mar. 30, 2014	Dec. 29, 2013	Mar. 30, 2014	Dec. 29, 2013	Nov. 30, 2013	Nov. 30, 2013	Mar. 30, 2014
				Common Class A [Member]	Common Class A [Member]	Common Class B [Member]	Common Class B [Member]	IPO [Member]	IPO [Member]	Restricted Stock [Member]
									Common Class A [Member]
Class of Stock [Line Items]	'	'	'	'	'	'	'	'	'	'
Preferred stock, shares authorized	2,000,000	'	2,000,000	'	'	'	'	'	'	'
Common stock, shares authorized	775,000,000	'	'	500,000,000	500,000,000	275,000,000	275,000,000	'	'	'
Common stock, par value per share	$0.00	'	'	$0.00	$0.00	$0.00	$0.00	'	'	'
Shares issued, new shares	'	'	'	'	'	'	'	'	7,334,125	'
Sale of stock, price per share	'	'	'	'	'	'	'	'	$22	'
Sale of stock, number of shares sold by stockholders	'	'	'	'	'	'	'	'	5,890,875	'
Proceeds from issuance, initial public offering	'	'	'	'	'	'	'	$147,500,000	'	'
Underwriting discounts and offering expenses	$385,000	$0	'	'	'	'	'	$3,300,000	'	'
Number of shares vested	'	'	'	'	'	'	'	'	'	52,812,500

Stockholders_Equity_Stock_Opti

Stockholders' Equity (Stock Option Activity) (Details) (USD $)	3 Months Ended	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 30, 2014	Dec. 29, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]	'	'
Outstanding, Beginning Balance	13,938,487	'
Granted	424,939	'
Exercised	-755,790	'
Canceled	-1,539	'
Forfeited	-130,577	'
Outstanding, Ending Balance	13,475,520	13,938,487
Vested and expected to vest	13,124,716	'
Exercisable	9,255,777	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Weighted Average Exercise Price [Abstract]	'	'
Weighted Average Exercise Price, Outstanding, Beginning Balance	$7.40	'
Weighted Average Exercise Price, Granted	$43.79	'
Weighted Average Exercise Price, Exercised	$0.28	'
Weighted Average Exercise Price, Canceled	$6.05	'
Weighted Average Exercise Price, Forfeited	$8.77	'
Weighted Average Exercise Price, Outstanding, Ending Balance	$8.94	$7.40
Weighted Average Exercise Price, Vested and expected to vest	$8.77	'
Weighted Average Exercise Price, Exercisable	$6.93	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]	'	'
Weighted Average Remaining Contractual Term, Outstanding, Beginning Balance	'8 years 5 months 16 days	'8 years 6 months 22 days
Weighted Average Remaining Contractual Term, Vested and expected to vest	'8 years 5 months 9 days	'
Weighted Average Remaining Contractual Term, Exercisable	'8 years 3 months	'
Weighted Average Remaining Contractual Term, Outstanding, Ending Balance	'8 years 5 months 16 days	'8 years 6 months 22 days
Total Intrinsic Value, Outstanding	$580,009	$462,558
Total Intrinsic Value, Vested and expected to vest	567,123	'
Total Intrinsic Value, Exercisable	$416,845	'

Stockholders_Equity_StockBased

Stockholders' Equity (Stock-Based Compensation Expense) (Details) (USD $)	Mar. 30, 2014	Mar. 30, 2014	Jan. 01, 2012	Mar. 30, 2014	Dec. 29, 2013
In Millions, except Share data, unless otherwise specified		Stock options [Member]	2009 Plan [Member]	2009 Plan [Member]	2009 Plan [Member]
			Stock options [Member]	Stock options [Member]	Stock options [Member]
			Common Class B [Member]	Common Class B [Member]	Common Class B [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Shares issued for the exercise of stock options	'	'	1,439,627	'	'
Shares early exercised	'	'	473,958	'	'
Unvested portion of early exercised shares	'	'	'	22,136	63,151
Weighted average remaining vesting period, unvested stock options	'	'5 years 5 months 5 days	'	'	'
Total unrecognized compensation cost	$57.30	'	'	'	'

Stockholders_Equity_Allocation

Stockholders' Equity (Allocation of Recognized Period Costs) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 30, 2014	Mar. 31, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Stock-based compensation expense	$3,174	$898
Cost of Sales [Member]	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Stock-based compensation expense	22	14
Marketing Expenses [Member]	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Stock-based compensation expense	163	64
Selling, General and Administrative Expenses [Member]	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Stock-based compensation expense	$2,989	$820

Net_Income_Loss_Per_Share_Deta

Net Income Loss Per Share (Details) (USD $)	3 Months Ended		1 Months Ended	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 30, 2014	Mar. 31, 2013	Nov. 30, 2013	Mar. 30, 2014	Mar. 30, 2014
			Common Class B [Member]	Common Class B [Member]	Common Class A [Member]
Class of Stock [Line Items]	'	'	'	'	'
Outstanding shares of preferred stock automatically converted to shares of Class B Common Stock, upon Ccosing of Initial Public Offering	'	'	60,621,233	'	'
Common Stock, voting rights	'	'	'	10	1
Calculation of Basic and Diluted Income (Loss) Per Share)	'	'	'	'	'
Net loss	($2,950)	($1,595)	'	'	'
Less: Accretion of convertible redeemable preferred stock	0	-2,531	'	'	'
Net loss attributable to Class A and Class B common stockholders	($2,950)	($4,126)	'	'	'
Weighted average shares used to compute basic net loss per Class A and Class B common share	123,878,592	46,422,029	'	'	'
Effect of potentially dilutive securities:	'	'	'	'	'
Stock options	0	0	'	'	'
Unvested restricted common shares	0	0	'	'	'
Convertible preferred shares	0	0	'	'	'
Weighted average shares used to compute diluted net loss per Class A and Class B common share	123,878,592	46,422,029	'	'	'
Net loss per share attributable to Class A and Class B common stockholdersbbasic	($0.02)	($0.09)	'	'	'
Net loss per share attributable to Class A and Class B common stockholdersbdiluted	($0.02)	($0.09)	'	'	'

Net_Income_Loss_Per_Share_Sche

Net Income Loss Per Share (Schedule of Antidilutive Securities) (Details)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 30, 2014	Mar. 31, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Antidilutive securities excluded from computation of earnings per share, amount	13,527,231	76,687,279
Convertible preferred shares [Member]	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Antidilutive securities excluded from computation of earnings per share, amount	0	60,497,884
Unvested restricted common shares [Member]	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Antidilutive securities excluded from computation of earnings per share, amount	51,711	8,154,884
Stock options [Member]	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Antidilutive securities excluded from computation of earnings per share, amount	13,475,520	8,034,511

Segment_Information_Details

Segment Information (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 30, 2014	Mar. 31, 2013
	Segment
Segment Reporting [Abstract]	'	'
Number of reportable segments	2	'
Segment Reporting Information [Line Items]	'	'
Net sales	$237,881	$127,012
Operating (loss) income	-2,951	-1,613
Interest income (expense)-net	54	32
Other income (expense)-net	-53	-14
Net loss before provision for income taxes	-2,950	-1,595
North America [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Operating (loss) income	-2,947	-1,646
United Kingdom [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Net sales	4,677	4,397
Operating (loss) income	-4	33
Segment Reconciling Items [Member] | North America [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Net sales	234,360	124,324
Operating (loss) income	-1,791	63
Segment Reconciling Items [Member] | United Kingdom [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Net sales	3,521	2,688
Intersegment Eliminations [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Net sales	-1,156	-1,709
Intersegment Eliminations [Member] | North America [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Operating (loss) income	-1,156	-1,709
Intersegment Eliminations [Member] | United Kingdom [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Net sales	1,156	1,709
Reportable Segments [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Net sales	239,037	128,721
Operating (loss) income	($2,951)	($1,613)

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (Fair Value, Measurements, Recurring [Member], USD $)	Mar. 30, 2014	Dec. 29, 2013
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets	$71,027	$36,033
Fair Value, Inputs, Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets	18,018	18,019
Fair Value, Inputs, Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets	53,009	18,014
Fair Value, Inputs, Level 3 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets	0	0
Commercial Paper [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Short-term investments	53,009	18,014
Commercial Paper [Member] | Fair Value, Inputs, Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Short-term investments	0	0
Commercial Paper [Member] | Fair Value, Inputs, Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Short-term investments	53,009	18,014
Commercial Paper [Member] | Fair Value, Inputs, Level 3 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Short-term investments	0	0
Money Market Funds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash equivalents	18,018	18,019
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash equivalents	18,018	18,019
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash equivalents	0	0
Money Market Funds [Member] | Fair Value, Inputs, Level 3 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash equivalents	$0	$0