Arlo (ARLO) 10-Q 6 May 19 2019 Q1 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2019	Apr. 19, 2019
Document And Entity Information [Abstract]
Entity Registrant Name	Arlo Technologies, Inc.
Entity Central Index Key	0001736946
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding		74,548,465

Unaudited Condensed Consolidate

Unaudited Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 135,582	$ 151,290
Short-term investments	44,792	49,737
Accounts receivable, net	71,566	166,045
Inventories	131,227	124,791
Receivables from NETGEAR, net	130	12,184
Prepaid expenses and other current assets	11,121	11,427
Total current assets	394,418	515,474
Property and equipment, net	28,988	49,428
Operating lease right-of-use assets	27,033
Intangibles, net	2,442	2,823
Goodwill	15,638	15,638
Restricted cash	4,133	4,134
Other non-current assets	7,722	8,449
Total assets	480,374	595,946
Current liabilities:
Accounts payable	55,016	82,542
Deferred revenue	25,961	26,678
Accrued liabilities	119,055	172,036
Income tax payable	1,140	734
Total current liabilities	201,172	281,990
Non-current deferred revenue	21,776	23,313
Non-current operating lease liabilities	25,256
Non-current financing lease obligation	0	19,978
Non-current income taxes payable	22	22
Other non-current liabilities	7	1,141
Total liabilities	248,233	326,444
Commitments and contingencies
Stockholders’ Equity:
Preferred stock	0	0
Common stock	75	74
Additional paid-in capital	318,862	315,277
Accumulated other comprehensive income	56	0
Accumulated deficit	(86,852)	(45,849)
Total stockholders’ equity	232,141	269,502
Total liabilities and stockholders’ equity	$ 480,374	$ 595,946

Unaudited Condensed Consolida_2

Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Revenue	$ 57,880	$ 100,638
Cost of revenue	55,935	71,585
Gross profit	1,945	29,053
Operating expenses:
Research and development	18,161	12,025
Sales and marketing	14,221	11,212
General and administrative	10,536	4,878
Separation expense	906	6,557
Total operating expenses	43,824	34,672
Loss from operations	(41,879)	(5,619)
Interest income	862	0
Other income (expense), net	(47)	575
Loss before income taxes	(41,064)	(5,044)
Provision for income taxes	220	319
Net loss	$ (41,284)	$ (5,363)
Net loss per share:
Basic (in dollars per share)	$ (0.55)	$ (0.09)
Diluted (in dollars per share)	$ (0.55)	$ (0.09)
Weighted average shares used to compute net loss per share:
Basic (in shares)	74,409	62,500
Diluted (in shares)	74,409	62,500
Products
Revenue	$ 46,608	$ 92,431
Cost of revenue	50,284	67,843
Services
Revenue	11,272	8,207
Cost of revenue	$ 5,651	$ 3,742

Unaudited Condensed Consolida_3

Unaudited Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Statement of Comprehensive Income [Abstract]
Net loss	$ (41,284)	$ (5,363)
Other comprehensive income, before tax:
Unrealized gain on derivative instruments	40
Gains (Losses) Recognized in OCI - Effective Portion		0
Unrealized gain on available-for-sale securities	21	0
Total other comprehensive income, before tax	61	0
Tax provision related to derivative instruments	(5)	0
Total other comprehensive income, net of tax	56	0
Comprehensive loss	$ (41,228)	$ (5,363)

Unaudited Condensed Consolida_4

Unaudited Condensed Consolidated Statements of Stockholders' Equity Statement - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Net Parent Investment	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	NETGEAR
Beginning balance at Dec. 31, 2017	$ 125,419			$ 125,419
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(5,363)			(5,363)
Stock-based compensation expense				852			$ 852
Net transfer to Parent	(24,910)			(24,910)
Ending balance at Apr. 01, 2018	92,937			92,937
Beginning balance (in shares) at Dec. 31, 2018		74,247
Beginning balance at Dec. 31, 2018	269,502	$ 74	$ 315,277	0	$ 0	$ (45,849)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(41,284)					(41,284)
Stock-based compensation expense	4,653		4,653
Issuance of common stock under stock-based compensation plans (in shares)		481
Issuance of common stock under stock-based compensation plans	1	$ 1
Restricted stock unit withholdings (in shares)		(176)
Restricted stock unit withholdings	(1,068)		(1,068)
Change in unrealized gains and losses on available-for-sale securities, net of tax	21				21
Change in unrealized gains and losses on derivatives, net of tax	35				35
Ending balance (in shares) at Mar. 31, 2019		74,552
Ending balance at Mar. 31, 2019	$ 232,141	$ 75	$ 318,862	$ 0	$ 56	$ (86,852)

Unaudited Condensed Consolida_5

Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Cash flows from operating activities:
Net loss	$ (41,284)	$ (5,363)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	3,025	887
Premium amortization / discount accretion on investments, net	(137)	0
Stock-based compensation expense	4,653	852
Deferred income taxes	(12)	0
Changes in operating assets and liabilities:
Accounts receivable, net	94,479	56,248
Inventories	(6,436)	(21,274)
Receivables from NETGEAR, net	12,054	0
Prepaid expenses and other assets	1,060	(737)
Accounts payable	(27,486)	35
Deferred revenue	(2,254)	2,583
Accrued and other liabilities	(53,553)	(8,160)
Income taxes payable	406	319
Net cash provided by (used in) operating activities	(15,485)	25,390
Cash flows from investing activities:
Purchases of property and equipment	(4,260)	(410)
Purchases of short-term investments	(9,897)	0
Proceeds from maturities of short-term investments	15,000	0
Net cash provided by (used in) investing activities	843	(410)
Cash flows from financing activities:
Proceeds related to employee benefit plans	1	0
Restricted stock unit withholdings	(1,068)	0
Net investment to parent	0	(24,910)
Net cash used in financing activities	(1,067)	(24,910)
Net increase (decrease) in cash and cash equivalents and restricted cash	(15,709)	70
Cash and cash equivalents and restricted cash, at beginning of period	155,424	108
Cash and cash equivalents and restricted cash, at end of period	139,715	178
Non-cash investing activities:
Purchases of property and equipment included in accounts payable and accrued liabilities	(1,095)	$ (120)
De-recognition of build-to-suit assets and liabilities	$ (21,610)

The Company and Basis of Presen

The Company and Basis of Presentation	3 Months Ended
	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
The Company and Basis of Presentation	The Company and Basis of Presentation The Company Arlo Technologies, Inc. (“Arlo” or the “Company”) combines an intelligent cloud infrastructure and mobile app with a variety of smart connected devices that transform the way people experience the connected lifestyle. Its cloud-based platform creates a seamless, end-to-end connected lifestyle solution that provides users visibility, insight and a powerful means to help protect and connect with the people and things that matter most to them. Arlo enables users to monitor their environments and engage in real-time with their families and businesses from any location with a Wi-Fi or a cellular network internet connection. The Company conducts business across three geographic regions - Americas; Europe, Middle-East and Africa (“EMEA”); and Asia Pacific (“APAC”) - and primarily generates revenue by selling devices through retail channels, wholesale distribution and wireless carrier channels and paid subscription services through in-app purchases. On February 6, 2018, NETGEAR Inc. (“NETGEAR”) announced that its board of directors had unanimously approved the pursuit of a separation of its Arlo business from NETGEAR (the “Separation”) to be effected through an initial public offering (the “IPO”) of newly issued shares of the common stock of Arlo, then a wholly owned subsidiary of NETGEAR. On July 6, 2018, the Company filed a registration statement (as amended, the “IPO Registration Statement”) relating to the IPO of common stock of Arlo with the U.S. Securities and Exchange Commission (the “SEC”). Following a series of restructuring steps prior to the completion of the IPO of Arlo common stock, the Arlo business was transferred from NETGEAR to Arlo (collectively, the “Contribution”). On August 2, 2018, NETGEAR and Arlo announced the pricing of the IPO of 10,215,000 shares of Arlo’s common stock at a price to the public of $16.00 per share. On August 3, 2018, Arlo’s shares began trading on the New York Stock Exchange under the ticker symbol “ARLO.” On August 7, 2018, the Company completed its IPO of 11,747,250 shares of common stock (including 1,532,250 shares of common stock pursuant to the underwriters’ option to purchase additional shares, which was exercised in full on August 3, 2018), at $16.00 per share, before underwriting discounts and commissions and estimated offering costs. Cash proceeds from the IPO were $173.4 million , net of the portion of the offering cost paid by Arlo, which portion was $1.4 million . The total offering cost was $4.6 million , of which $3.2 million was paid by NETGEAR. Prior to the completion of the IPO, the Company was a wholly owned subsidiary of NETGEAR and upon the closing of the IPO (including the issuance of additional shares of common stock pursuant to the underwriters’ option to purchase additional shares, which was exercised in full) on August 7, 2018, NETGEAR owned approximately 84.2% of the shares of Arlo’s outstanding common stock. On November 29, 2018, NETGEAR announced that its board of directors had approved a special stock dividend (the “Distribution”) to NETGEAR stockholders of the 62,500,000 shares of Arlo common stock owned by NETGEAR. The Distribution was made on December 31, 2018 (the “Distribution Date”) to all NETGEAR stockholders of record as of the close of business on December 17, 2018 (the “Record Date”). In the Distribution, each NETGEAR stockholder of record on the Record Date received 1.980295 shares of Arlo common stock for every share of NETGEAR common stock held on the Record Date, subject to cash in lieu of fractional shares. The Distribution was intended to qualify as generally tax free to NETGEAR stockholders for U.S. federal income tax purposes. In connection with the Distribution, 62,500,000 shares of Arlo common stock held by NETGEAR were distributed to its stockholders and NETGEAR is no longer considered a related party to the Company. Basis of Presentation The unaudited condensed combined financial statements of Arlo that cover periods ending or as of dates prior to the completion of the IPO have been derived and carved out from the consolidated financial statements and accounting records of NETGEAR as if Arlo had operated on a stand-alone basis within the periods presented. In connection with the Separation and IPO, certain assets and liabilities presented have been transferred to Arlo at carry-over (historical cost) basis. Balances contributed by NETGEAR on or before the completion of the IPO were based on the master separation agreement between the Company and NETGEAR and related documents governing the Contribution. Following the completion of the IPO, the unaudited condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All periods presented have been accounted for in conformity with U.S. Generally Accepted Accounting Principles (“U.S. GAAP”) and pursuant to the regulations of the U.S. Securities and Exchange Commission (“SEC”). These unaudited condensed consolidated financial statements should be read in conjunction with the notes to the audited consolidated financial statements included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2018. In the opinion of management, these unaudited condensed consolidated financial statements reflect all adjustments, consisting only of normal recurring adjustments, which are necessary for fair statement of the unaudited condensed consolidated financial statements for interim periods. The Company has evaluated all subsequent events through the date the financial statements were issued. Allocated Expenses from NETGEAR Prior to the completion of the IPO, NETGEAR provided certain corporate services to the Company, which were allocated based on revenue, headcount, or other measures the Company has determined as reasonable through July 1, 2018. The amount of these allocations from NETGEAR reflected within operating expenses in the unaudited condensed consolidated statements of operations was $13.8 million for the three months ended April 1, 2018 , which included $4.3 million for research and development, $4.6 million for sales and marketing, and $4.9 million for general and administrative expense. Following July 1, 2018, the Company assumed responsibility for the costs of these functions. Fiscal periods The Company’s fiscal year begins on January 1 of the year stated and ends on December 31 of the same year. The Company reports its results on a fiscal quarter basis rather than on a calendar quarter basis. Under the fiscal quarter basis, each of the first three fiscal quarters ends on the Sunday closest to the calendar quarter end, with the fourth quarter ending on December 31. Use of estimates The preparation of these unaudited condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reported periods. Management bases its estimates on various assumptions believed to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities. Actual results could differ materially from those estimates and operating results for the three months ended March 31, 2019 are not necessarily indicative of the results that may be expected for the year ending December 31, 2019 or any future period.

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2019
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Significant Accounting Policies and Recent Accounting Pronouncements The Company’s significant accounting policies are disclosed in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018. There have been no significant changes during the three months ended March 31, 2019 , other than the accounting policy discussed below. Leases The Company determines if an arrangement is a lease at inception. Operating leases are included in operating lease right-of-use (“ROU”) assets, accrued liabilities, and non-current operating lease liabilities in the unaudited condensed consolidated balance sheets. Leases with an initial term of 12 months or less are not recorded on the balance sheet. Lease expense for lease payments are recognized in the unaudited condensed consolidated statements of operations on a straight-line basis over the lease term and variable lease payments in the period in which the obligation for those payments is incurred. ROU assets represent the Company’s right to use an underlying asset over the lease term and lease liabilities represent its obligation to make lease payments arising from the lease. Operating lease ROU assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. As most of the leases do not provide an implicit rate, the incremental borrowing rate based on the information available was used at commencement date in determining the present value of lease payments. The Company uses the implicit rate when readily determinable. The operating lease ROU asset also includes any lease payments made before the lease commencement date less any lease incentives received. The lease terms may include options to extend or terminate the lease when it is reasonably certain that the Company will exercise the options. The lease agreements with lease and non-lease components are generally accounted as a single component. Recent accounting pronouncements Emerging Growth Company Status As an emerging growth company (“EGC”), the Jumpstart Our Business Startups Act (“JOBS Act”) allows the Company to delay adoption of new or revised accounting pronouncements applicable to public companies until such pronouncements are made applicable to private companies, unless the Company otherwise irrevocably elects not to avail itself of this exemption. The Company did not make such an irrevocable election and has not delayed the adoption of any applicable accounting standards. Accounting Pronouncements Recently Adopted ASU 2016-02 In February 2016, the Financial Accounting Standards Board (“FASB”) issued ASU 2016-02, “Leases” (Topic 842), which requires lessees to recognize on the balance sheets a ROU asset, representing its right to use the underlying asset for the lease term, and a corresponding lease liability for all leases with terms greater than 12 months. The liability will be equal to the net present value of minimum lease payments while the ROU asset will be based on the liability, subject to adjustment, such as for initial direct costs. On January 1, 2019 (“adoption date”), the Company adopted the new standard utilizing the modified retrospective transition method through a cumulative-effect adjustment at the beginning of the first fiscal quarter of 2019. The Company has elected the package of practical expedients, which allows the Company not to reassess (1) whether an expired or existing contracts as of adoption date contain a lease, (2) lease classification for any expired or existing lease as of the adoption date and (3) initial direct costs for any existing lease as of the adoption date. The Company also elected to account for each separate lease component of a contract and its associated non-lease components as a single lease component. The adoption of ASU 2016-02 resulted in the recognition of ROU assets and lease liabilities for operating leases of $14.4 million as of January 1, 2019 on its unaudited condensed consolidated balance sheets, with no material impact its consolidated statements of operations and cash flows. In addition, the Company was deemed to be the accounting owner of its build-to-suit lease arrangement for its San Jose corporate headquarters and the construction was in progress at adoption date. As such, the Company reevaluated its build-to-suit lease arrangement under ASU 2016-02 to ascertain whether it meets the criteria as the accounting owner of the build-to-suit lease arrangement through control of the underlying leased asset. The Company concluded that it did not have control over the underlying leased asset. As a result, the Company de-recognized the build to suit asset and liability as of adoption date of $21.6 million of Property and equipment and $21.9 million of financing lease obligations. The difference of $0.3 million between the de-recognized assets and the financing lease obligations was recorded as an adjustment to Accumulated deficit as of adoption date as mentioned above. The Company accounted for its San Jose Corporate lease arrangement as operating lease under ASU 2016-02. Consequently, as of March 31, 2019, the construction of its leasehold improvements for its San Jose corporate headquarters was partially completed and partially occupied by the Company resulting in lease commencement for the portion that was completed and occupied by the Company. Therefore as of March 31, 2019, the Company proportionally recorded an estimated value of ROU assets and lease liabilities of $14.3 million representing two thirds of the value of the ROU and lease liabilities. Upon expected completion of the leasehold improvements in the second quarter of fiscal 2019, the Company will recognize the remaining estimated value of ROU and lease liabilities of approximately $7.2 million . Refer to Note 8. Commitments and Contingencies , for further details of the impacts on the adoption. Accounting Pronouncements Not Yet Effective ASU 2016-13 In June 2016, the FASB issued ASU 2016-13, “Measurement of Credit Losses on Financial Instruments” (Topic 326), which replaces the incurred-loss impairment methodology and requires immediate recognition of estimated credit losses expected to occur for most financial assets, including trade receivables. ASU 2016-13 is effective for the Company beginning in the first fiscal quarter of 2021 (or the first fiscal quarter of 2020 should the Company cease to be classified as an EGC), with early adoption permitted. The Company continues to assess the potential impact of the new guidance, but does not expect it to have a material impact on its financial position, results of operations, or cash flows. With the exception of the new standards discussed above, there have been no other new accounting pronouncements that have significance, or potential significance, to the Company’s financial position, results of operations, or cash flows.

Balance Sheet Components

Balance Sheet Components	3 Months Ended
	Mar. 31, 2019
Balance Sheet Related Disclosures [Abstract]
Balance Sheet Components	Balance Sheet Components Cash and Cash Equivalents and Restricted cash The Company maintains certain cash balances restricted as to withdrawal or use. The restricted cash is comprised primarily of cash used as a collateral for a letter of credit associated with the Company’s lease agreement for its headquarters in San Jose, California. The Company deposits restricted cash with high credit quality financial institutions. The following table totals cash and cash equivalents and restricted cash as reported on the consolidated balance sheet as of March 31, 2019 and December 31, 2018 , and the sum is presented on the consolidated statements of cash flows: As of March 31, December 31, (In thousands) Cash and cash equivalents $ 135,582 $ 151,290 Restricted cash 4,133 4,134 Total as presented on the consolidated statements of cash flows $ 139,715 $ 155,424 Available-for-sale short-term investments As of March 31, 2019 As of December 31, 2018 Cost Unrealized Gains Unrealized Losses Estimated Fair Value Cost Unrealized Gains Unrealized Losses Estimated Fair Value (In thousands) U.S. treasuries $ 44,773 $ 19 $ — $ 44,792 $ 49,739 $ 2 $ (4 ) $ 49,737 The Company’s short-term investments are classified as available-for-sale and consist of government securities with an original maturity or remaining maturity at the time of purchase of greater than three months and no more than twelve months. Accordingly, none of the available-for-sale securities have unrealized losses greater than twelve months. Accounts receivable, net As of March 31, December 31, (In thousands) Gross accounts receivable $ 71,998 $ 166,172 Allowance for doubtful accounts (432 ) (127 ) Total accounts receivable, net $ 71,566 $ 166,045 Property and equipment, net The components of property and equipment are as follows: As of March 31, December 31, (In thousands) Machinery and equipment $ 11,447 $ 11,415 Leasehold improvements (1) 2,917 3,007 Software 10,628 10,624 Computer equipment 3,824 4,342 Furniture and fixtures 1,180 2,698 Construction in progress (1) 12,095 28,357 Total property and equipment, gross 42,091 60,443 Accumulated depreciation and amortization (13,103 ) (11,015 ) Total property and equipment, net $ 28,988 $ 49,428 _________________________ (1) The Company had a build-to-suit lease arrangement under its corporate headquarters lease in San Jose, California. Upon the adoption of ASU 2016-02, the Company concluded that it did not have control over the underlying leased asset and de-recognized $21.6 million of Construction of progress. Refer to Note 8, Commitments and Contingencies , for further details. Depreciation and amortization expense pertaining to property and equipment was $2.0 million and $0.5 million for the three months ended March 31, 2019 and April 1, 2018 , respectively. Allocated depreciation expense from NETGEAR was $0.7 million for the three months ended April 1, 2018 . For the periods prior to the completion of the IPO, the unaudited condensed consolidated statements of operations include both the depreciation expense directly identifiable as Arlo’s and allocated depreciation expense from NETGEAR. Refer to Allocated Expenses from NETGEAR as discussed in Note 1, The Company and Basis of Presentation , for detailed disclosures regarding the methodology used for allocated expenses from NETGEAR. Intangibles, net As of March 31, 2019 As of December 31, 2018 Gross Accumulated Amortization Net Gross Accumulated Amortization Net (In thousands) Technology $ 9,800 $ (7,508 ) $ 2,292 $ 9,800 $ (7,165 ) $ 2,635 Other 500 (350 ) 150 800 (612 ) 188 Total intangibles, net $ 10,300 $ (7,858 ) $ 2,442 $ 10,600 $ (7,777 ) $ 2,823 As of March 31, 2019 , the remaining weighted-average estimated useful life of intangibles was 1.6 years. Amortization of intangibles was $0.4 million and $0.4 million for the three months ended March 31, 2019 and April 1, 2018 . As of March 31, 2019 , estimated amortization expense related to finite-lived intangibles for the remaining years was as follows (in thousands): 2019 (remaining nine months) $ 1,136 2020 1,306 Total estimated amortization expense $ 2,442 Goodwill There was no change in the carrying amount of goodwill during the three months ended March 31, 2019 and the goodwill as of December 31, 2018 and March 31, 2019 was as follows (in thousands): As of December 31, 2018 $ 15,638 As of March 31, 2019 $ 15,638 Goodwill Impairment The Company performs an annual assessment of goodwill at the reporting unit level on the first day of the fourth fiscal quarter and during interim periods if there are triggering events to reassess goodwill. The Company’s common stock declined after the Company announced its fourth quarter of fiscal year 2018 earnings release on February 5, 2019. The average closing price per share for the common stock for the eight trading days after such earnings release was $3.71 , a 223.3% decrease compared to the average closing price for the fourth quarter of fiscal year 2018. A sustained decline in common stock and the resulting impact to the Company’s market capitalization as well as a downward revision to the Company’s business outlook for fiscal year ending December 31, 2019 are qualitative factors to consider when evaluating whether events or changes in circumstances indicate it is a more likely than not a potential goodwill impairment exists. The Company concluded that the decline in the price of its common stock in February 2019 did represent a sustained decline and therefore was an indicator that the Company’s goodwill might be impaired. As a result, the Company performed a quantitative assessment as of February 7, 2019. The Company operates as one operating and reportable segment. To determine the fair value for the reporting unit, the Company utilized its common stock price and included a market participant acquisition premium (“MPAP”) assumption. A significant decrease in MPAP could result in a significantly lower fair value estimate. The concluded fair value exceeded the Company's carrying amount by approximately 29.8% . Decreasing the selected MPAP of 25% by 250 basis points would result in the concluded fair value exceeding the carrying amount by approximately 27.2% . As fair value was greater than carrying amount, goodwill was not impaired as of December 31, 2018 using the February 7, 2019 valuation. If there is a further decline in the Company’s stock price based on market conditions and deterioration of the Company’s business, the Company may have to record a charge to its earnings for the goodwill impairment of up to $15.6 million . As of March 31, 2019 and December 31, 2018, the Company’s goodwill was no t impaired. Other non-current assets As of March 31, December 31, 2018 (In thousands) Non-current deferred income taxes $ 1,121 $ 1,108 Deposits 3,484 4,084 Other 3,117 3,257 Total other non-current assets $ 7,722 $ 8,449 Accrued liabilities As of March 31, December 31, (In thousands) Sales and marketing $ 54,011 $ 75,863 Sales returns 30,804 49,247 Warranty obligation 3,201 3,712 Accrued employee compensation 8,626 11,897 Freight 1,300 3,913 Current financing lease obligation — 1,632 Other 21,113 25,772 Total accrued liabilities $ 119,055 $ 172,036

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The following tables summarize assets and liabilities measured at fair value on a recurring basis as of March 31, 2019 : Total Quoted market prices in active markets (Level 1) Significant other observable inputs (Level 2) (In thousands) Assets: Cash equivalents: U.S. treasuries (<90 days) $ 5,722 $ 5,722 $ — Available-for-sale securities: U.S. treasuries (1) 44,792 44,792 — Foreign currency forward contracts (2) 288 — 288 Total assets measured at fair value $ 50,802 $ 50,514 $ 288 Liabilities: Foreign currency forward contracts (3) $ 43 $ — $ 43 Total liabilities measured at fair value $ 43 $ — $ 43 _________________________ (1) Included in Short-term investments on the Company’s unaudited condensed consolidated balance sheets. (2) Included in Prepaid expenses and other current assets on the Company’s unaudited condensed consolidated balance sheets. (3) Included in Accrued liabilities on the Company’s unaudited condensed consolidated balance sheets. The Company’s investments in cash equivalents and available-for-sale securities are classified within Level 1 of the fair value hierarchy because they are valued based on quoted market prices in active markets. The Company enters into foreign currency forward contracts with only those counterparties that have long-term credit ratings of A-/A3 or higher. The Company’s foreign currency forward contracts are classified within Level 2 of the fair value hierarchy as they are valued using pricing models that take into account the contract terms as well as currency rates and counterparty credit rates. The Company verifies the reasonableness of these pricing models using observable market data for related inputs into such models. Additionally, the Company includes an adjustment for non-performance risk in the recognized measure of fair value of derivative instruments. As of March 31, 2019 , the adjustment for non-performance risk did not have a material impact on the fair value of the Company’s foreign currency forward contracts. The carrying value of non-financial assets and liabilities measured at fair value in the financial statements on a recurring basis, including accounts receivable and accounts payable, approximate fair value due to their short maturities. As of March 31, 2019 , the Company has no Level 3 fair value assets or liabilities.

Derivative Financial Instrument

Derivative Financial Instruments	3 Months Ended
	Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments Fair value of derivative instruments The fair values of the Company’s derivative instruments and the line items on the unaudited condensed consolidated balance sheets to which they were recorded as of March 31, 2019 are summarized as follows: Derivative Assets Balance Sheet Location March 31, 2019 December 31, 2018 Balance Sheet Location March 31, 2019 December 31, 2018 (In thousands) (In thousands) Derivative assets not designated as hedging instruments Prepaid expenses and other current assets $ 242 $ 293 Other accrued liabilities $ 39 $ 46 Derivative assets designated as hedging instruments Prepaid expenses and other current assets 46 29 Other accrued liabilities 4 25 Total $ 288 $ 322 $ 43 $ 71 Refer to Note 4, Fair Value Measurements, for detailed disclosures regarding fair value measurements in accordance with the authoritative guidance for fair value measurements and disclosures. Gross amounts offsetting of derivative instruments The Company has entered into master netting arrangements which allow net settlements under certain conditions. Although netting is permitted, it is currently the Company’s policy and practice to record all derivative assets and liabilities on a gross basis in the consolidated balance sheets. The following tables set forth the offsetting of derivative assets as of March 31, 2019 and December 31, 2018: As of March 31, 2019 Gross Amounts Not Offset in the Unaudited Condensed Consolidated Balance Sheets Gross Amounts of Recognized Assets Gross Amounts Offset in the Unaudited Condensed Consolidated Balance Sheets Net Amounts Of Assets Presented in the Unaudited Condensed Consolidated Balance Sheets Financial Instruments Cash Collateral Pledged Net Amount (In thousands) HSBC $ 210 $ — $ 210 $ (24 ) $ — $ 186 JP Morgan 75 — 75 (19 ) — 56 Wells Fargo Bank 3 — 3 — — 3 Total $ 288 $ — $ 288 $ (43 ) $ — $ 245 As of December 31, 2018 Gross Amounts Not Offset in the Unaudited Condensed Consolidated Balance Sheets Gross Amounts of Recognized Assets Gross Amounts Offset in the Unaudited Condensed Consolidated Balance Sheets Net Amounts Of Assets Presented in the Unaudited Condensed Consolidated Balance Sheets Financial Instruments Cash Collateral Pledged Net Amount (In thousands) HSBC $ 100 $ — $ 100 $ — $ — $ 100 Wells Fargo Bank 222 — 222 (68 ) — 154 Total $ 322 $ — $ 322 $ (68 ) $ — $ 254 The following tables set forth the offsetting of derivative liabilities as of March 31, 2019 and December 31, 2018: As of March 31, 2019 Gross Amounts Not Offset in the Unaudited Condensed Consolidated Balance Sheets Gross Amounts of Recognized Liabilities Gross Amounts Offset in the Unaudited Condensed Consolidated Balance Sheets Net Amounts Of Liabilities Presented in the Unaudited Condensed Consolidated Balance Sheets Financial Instruments Cash Collateral Pledged Net Amount (In thousands) HSBC $ 24 $ — $ 24 $ (24 ) $ — $ — JP Morgan 19 — 19 (19 ) — — Total $ 43 $ — $ 43 $ (43 ) $ — $ — As of December 31, 2018 Gross Amounts Not Offset in the Unaudited Condensed Consolidated Balance Sheets Gross Amounts of Recognized Liabilities Gross Amounts Offset in the Unaudited Condensed Consolidated Balance Sheets Net Amounts Of Liabilities Presented in the Unaudited Condensed Consolidated Balance Sheets Financial Instruments Cash Collateral Pledged Net Amount (In thousands) JP Morgan $ 3 $ — $ 3 $ — $ — $ 3 Wells Fargo Bank 68 — 68 (68 ) — — Total $ 71 $ — $ 71 $ (68 ) $ — $ 3 Cash flow hedges The Company typically hedges portions of its anticipated foreign currency exposure which generally are less than six months. The Company entered into eight forward contracts per quarter with an average size of $2.6 million USD equivalent related to its cash flow hedging program. The effects of the Company’s cash flow hedges on the unaudited condensed consolidated statements of operations for the three months ended March 31, 2019 are summarized as follows: Location and Amount of Gains (Losses) Recognized in Income on Cash Flow Hedges Revenue Cost of revenue Research and development Sales and marketing General and administrative (In thousands) Statements of operations $ 57,880 $ 55,935 $ 18,161 $ 14,221 $ 10,536 Gains (losses) on cash flow hedge $ 120 $ (1 ) $ (18 ) $ (11 ) $ (5 ) The Company expects to reclassify to earnings all of the amounts recorded in AOCI associated with its cash flow hedges over the next twelve months. For information on the unrealized gains or losses on derivatives reclassified out of AOCI into the consolidated statements of operations, refer to Note 6, Accumulated Other Comprehensive Income (Loss). Derivative instruments designated as cash flow hedges must be de-designated as hedges when it is probable the forecasted hedged transaction will not occur within the designated hedge period or if not recognized within 60 days following the end of the hedge period. The Company did not recognize any material net gains or losses related to the loss of hedge designation as there were no discontinued cash flow hedges during the three months ended March 31, 2019 . Non-designated hedges The Company adjusts its non-designated hedges monthly and enters into about five non-designated derivatives per quarter with an average size of $2.4 million . The hedges range typically from one to three months in duration. The effects of the Company’s non-designated hedge included in Other income (expense), net on the consolidated statements of operations for the year ended March 31, 2019 are as follows: Derivatives Not Designated as Hedging Instruments Location of Gains (Losses) Recognized in Income on Derivative Three Months Ended March 31, 2019 April 1, 2018 (In thousands) Foreign currency forward contracts Other income (expense), net $ 121 $ —

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss)	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) The following table sets forth the changes in accumulated other comprehensive income (loss) (“AOCI”) by component for the three months ended March 31, 2019 : Unrealized gains (losses) on available-for-sale securities Unrealized gains (losses) on derivatives Estimated tax benefit (provision) Total (In thousands) Balance as of December 31, 2018 $ (2 ) $ 2 $ — $ — Other comprehensive income (loss) before reclassifications 21 125 (5 ) 141 Less: Amount reclassified from accumulated other comprehensive income (loss) — 85 — 85 Net current period other comprehensive income (loss) 21 40 (5 ) 56 Balance as of March 31, 2019 $ 19 $ 42 $ (5 ) $ 56 The following tables provide details about significant amounts reclassified out of each component of AOCI for the three months ended March 31, 2019 : Gains (Losses) Recognized in OCI - Effective Portion Gains (Losses) Reclassified from OCI to Income - Effective Portion Affected Line Item in the Statements of Operations (In thousands) Gains (losses) on cash flow hedge: Foreign currency contracts $ 125 $ 120 Revenue Foreign currency contracts (1 ) Cost of revenue Foreign currency contracts (18 ) Research and development Foreign currency contracts (11 ) Sales and marketing Foreign currency contracts (5 ) General and administrative $ 85 Total * _________________________ * Tax impact to hedging gains and losses from derivative contracts was immaterial.

Deferred Revenue

Deferred Revenue	3 Months Ended
	Mar. 31, 2019
Revenue from Contract with Customer [Abstract]
Deferred Revenue	Deferred Revenue Deferred revenue consist of advance payments and deferred revenue, where the Company has unsatisfied performance obligations. Deferred revenue primarily consists of prepaid services and customer billings in advance of revenues being recognized from the Company subscription contracts. Transaction Price Allocated to the Remaining Performance Obligations Remaining performance obligations represent the transaction price allocated to performance obligations that are unsatisfied or partially unsatisfied as of the end of the reporting period. Unsatisfied and partially unsatisfied performance obligations consist of contract liabilities, in-transit orders with destination terms, and non-cancellable backlog. Non-cancellable backlog includes goods and services for which customer purchase orders have been accepted and that are scheduled or in the process of being scheduled for shipment. The following table includes estimated revenue expected to be recognized in the future related to performance obligations that are unsatisfied (or partially unsatisfied) as of March 31, 2019 : 1 year 2 years Greater than 2 years Total (In thousands) Performance obligations $ 41,385 $ 15,847 $ 6,580 $ 63,812 Majority of the performance obligation over one year pertains to revenue deferral from prepaid services. For the three months ended March 31, 2019 , $9.2 million of revenue was deferred due to unsatisfied performance obligations, primarily relating to over time service revenue, and $11.5 million of revenue was recognized for the satisfaction of performance obligations over time. $8.6 million of this recognized revenue was included in the contract liability balance at the beginning of the period. There were no significant changes in estimates during the period that would affect the contract balances. Disaggregation of Revenue The Company conducts business across three geographic regions: Americas, EMEA, and APAC. Sales and usage-based taxes are excluded from revenue. Refer to Note 12, Segment and Geographic Information , for revenue by geography.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Operating Leases The Company leases primarily office space with various expiration dates through June 2029 . Some of the leases include options to extend such leases for up to five years , and some include options to terminate such leases within one year . The terms of the Company’s facility for certain leases provide for rental payments on a graduated scale. The Company recognizes lease expense on a straight-line basis over the lease term. The operating lease expense for the three months ended March 31, 2019 was as follows: Statements of Operations Location March 31, 2019 (In thousands) Operating lease cost (1) General and administrative $ 863 ________________________ (1) Included short-term leases and variable lease costs which were immaterial. The effect of accounting standards adoption of ASU 2016-02 on the unaudited condensed consolidated statement of balance sheets and supplemental balance sheet information related to operating leases as of March 31, 2019 were as follows: Leases Balance Sheet Location March 31, 2019 January 1, 2019 December 31, 2018 (In thousands) Build-to-suit lease (1) Property and equipment, net $ — $ (21,610 ) $ 21,610 Build-to-suit lease (1) Accrued liabilities — (281 ) 281 Build-to-suit lease (1) Accrued liabilities — (1,632 ) 1,632 Build-to-suit lease (1) Non-current financing lease obligation — (19,978 ) 19,978 Build-to-suit lease (1) Retained earnings (Accumulated deficit) 281 281 — Operating leases (2) Operating lease right-of-use assets 27,033 14,400 — Operating leases (2) Accrued liabilities — (107 ) 107 Operating leases (2) Accrued liabilities 3,135 2,356 — Operating leases (2) Non-current deferred rent — (1,141 ) 1,141 Operating leases (2) Non-current operating lease liabilities 25,256 12,044 — ________________________ (1) The Company was deemed to be the accounting owner of its build-to-suit lease arrangement for its San Jose corporate headquarters and the construction was in progress at adoption date. As such, the Company reevaluated its build-to-suit lease arrangement under ASU 2016-02 to ascertain whether it meets the criteria as the accounting owner of the build-to-suit lease arrangement through control of the underlying leased asset. The Company concluded that it did not have control over the underlying leased asset. As a result, the Company de-recognized the build to suit asset and liability as of adoption date of $21.6 million of Property and equipment and $21.9 million of financing lease obligations. The difference of $0.3 million between the de-recognized assets and the financing lease obligations was recorded as an adjustment to Accumulated deficit as of the adoption date. (2) The Company adopted ASU 2016-02 on January 1, 2019 which resulted in the recognition of ROU assets and lease liabilities for operating leases of $14.4 million on its unaudited condensed consolidated balance sheets. The ROU assets were reduced by $0.1 million current deferred rent and $1.1 million non-current deferred rent which have been de-recognized along with the adoption. As of March 31, 2019, the construction of the Company’s leasehold improvements for its San Jose corporate headquarters was partially completed and partially occupied by the Company, resulting in lease commencement inception for the portion that was completed and occupied by the Company. Therefore, the Company proportionally recorded an estimated value of ROU assets and lease liabilities of $14.3 million , representing two thirds of the value of the ROU and lease liabilities. Upon expected completion of the leasehold improvements in the second quarter of fiscal 2019, the Company will recognize the remaining estimated value of ROU and lease liabilities of approximately $7.2 million . Supplemental cash flow information related to operating leases for the three months ended March 31, 2019 was as follows (in thousands): Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases $ 756 Right-of-use assets obtained in exchange for lease liabilities Operating leases $ 14,559 Weighted average remaining lease term and weighted average discount rate related to operating leases for the three months ended March 31, 2019 were as follows: Weighted average remaining lease term 6.0 years Weighted average discount rate 5.58 % The maturity of lease liabilities related to operating leases for each of the next five years and thereafter as of March 31, 2019 was as follows (in thousands): 2019 (Remaining nine months) $ 3,167 2020 5,021 2021 4,864 2022 4,730 2023 4,023 Thereafter 13,786 Total lease payments 35,591 Less: interest (1) (7,200 ) Total $ 28,391 Accrued liabilities $ 3,135 Non-current operating lease liabilities 25,256 Total $ 28,391 ________________________ (1) Calculated using the Company’s incremental borrowing rate on a collateralized basis plus LIBOR rate that closely matches contractual term of most leases. As of December 31, 2018 , future minimum lease payments under non-cancelable operating leases and build-to-suit lease arrangements, for each of the next five years and thereafter were as follows (in thousands): Leases (1) 2019 $ 4,634 2020 5,813 2021 5,678 2022 5,580 2023 4,903 Thereafter 19,252 Total $ 45,860 ________________________ (1) Amounts are based on ASC 840, Leases that was superseded upon the adoption of ASC 842, Leases on January 1, 2019. Letters of Credit In connection with the lease agreement for the headquarters located in San Jose, California, the Company executed a letter of credit with the landlord as the beneficiary. As of March 31, 2019, the Company had approximately $3.6 million of unused letters of credit outstanding, of which $3.1 million pertains to the lease arrangement in San Jose. Purchase Obligations The Company has entered into various inventory-related purchase agreements with suppliers. Generally, under these agreements, 50% of orders are cancelable by giving notice 46 to 60 days prior to the expected shipment date and 25% of orders are cancelable by giving notice 31 to 45 days prior to the expected shipment date. Orders are non-cancelable within 30 days prior to the expected shipment date. As of March 31, 2019 , the Company had approximately $28.1 million in non-cancelable purchase commitments with suppliers. The Company establishes a loss liability for all products it does not expect to sell for which it has committed purchases from suppliers. As of March 31, 2019 , the loss liability from committed purchases was $2.9 million . From time to time the Company’s suppliers procure unique complex components on the Company’s behalf. If these components do not meet specified technical criteria or are defective, the Company should not be obligated to purchase the materials. Warranty Obligations Changes in the Company’s warranty liability, which is included in Accrued liabilities in the unaudited condensed consolidated balance sheets, were as follows: Three Months Ended March 31, April 1, (In thousands) Balance at the beginning of the period $ 3,712 $ 31,756 Reclassified to sales returns upon adoption of ASC 606 (1) — (28,713 ) Provision for warranty obligation made during the period — 633 Settlements made during the period (511 ) (189 ) Balance at the end of the period $ 3,201 $ 3,487 ________________________ (1) Upon adoption of ASC 606 on January 1, 2018, warranty reserve balances totaling $28.7 million were reclassified to sales returns as these liabilities are payable to the Company’s customers and settled in cash or by credit on account. Under ASC 606, these amounts are to be accounted for as sales with right of return. Litigation and Other Legal Matters The Company is involved in disputes, litigation, and other legal actions, including, but not limited to, the matters described below. In all cases, at each reporting period, the Company evaluates whether or not a potential loss amount or a potential range of loss is probable and reasonably estimable under the provisions of the authoritative guidance that addresses accounting for contingencies. In such cases, the Company accrues for the amount, or if a range, the Company accrues the low end of the range, only if there is not a better estimate than any other amount within the range, as a component of legal expense within litigation reserves, net. The Company monitors developments in these legal matters that could affect the estimate the Company had previously accrued. In relation to such matters, the Company currently believes that there are no existing claims or proceedings that are likely to have a material adverse effect on its financial position within the next twelve months, or the outcome of these matters is currently not determinable. There are many uncertainties associated with any litigation, and these actions or other third-party claims against the Company may cause the Company to incur costly litigation and/or substantial settlement charges. In addition, the resolution of any intellectual property litigation may require the Company to make royalty payments, which could have an adverse effect in future periods. If any of those events were to occur, the Company's business, financial condition, results of operations, and cash flows could be adversely affected. The actual liability in any such matters may be materially different from the Company's estimates, which could result in the need to adjust the liability and record additional expenses. Beginning on December 11, 2018, purported stockholders of Arlo Technologies, Inc. filed putative securities class action complaints in the Superior Court of California, County of Santa Clara, and in the U.S. District Court for the Northern District of California against the Company and certain of its executives and directors. Some of these actions also name as defendants the underwriters in the Company’s IPO and NETGEAR, Inc. The actions pending in state court are Aversa v. Arlo Technologies, Inc., et al. , No. 18CV339231, filed Dec. 11, 2018; Pham v. Arlo Technologies, Inc. et al. , No. 19CV340741, filed January 9, 2019; Patel v. Arlo Technologies, Inc. , No. 19CV340758, filed January 10, 2019; Perros v. NetGear, Inc. , No. 19CV342071, filed February 1, 2019; Vardanian v. Arlo Technologies, Inc. , No. 19CV342318, filed February 8, 2019; and Hill v. Arlo Technologies, Inc. et al. , No. 19CV343033, filed February 22, 2019. The action pending in federal court is Wong v. Arlo Technologies, Inc. et al. , No. 19-CV-00372, filed January 22, 2019. The complaints generally allege that the Company failed to adequately disclose quality control problems and adverse sales trends ahead of its IPO, violating the Securities Act of 1933, as amended. The complaints seek unspecified monetary damages and other relief on behalf of investors who purchased Arlo common stock issued pursuant and/or traceable to the IPO offering documents. A case management conference for all state actions is scheduled for May 31, 2019. In the state court lawsuits, the court has issued an order deeming the cases complex and temporarily staying discovery. The plaintiffs are seeking to consolidate their cases and file a consolidate complaint. In the federal action, four investors filed motions to be appointed lead plaintiff. A hearing on the lead plaintiff motions is scheduled for May 9, 2019. The Company has not filed an answer in the state court or federal court lawsuits. Regardless of the merits or ultimate results of the above-described litigation matters, they could result in substantial costs, which would hurt the Company’s financial condition and results of operations and divert management’s attention and resources from our business. At this point, however, it is too early to reasonably estimate any financial impact to the Company resulting from these litigation matters. Indemnification of Directors and Officers The Company, as permitted under Delaware law and in accordance with its bylaws, has agreed to indemnify its officers and directors for certain events or occurrences, subject to certain conditions, while the officer or director is or was serving at the Company’s request in such capacity. The term of the indemnification period is for the officer’s or director’s lifetime. The maximum amount of potential future indemnification is unlimited; however, the Company has a director and officer insurance policy that will enable it to recover a portion of any future amounts paid. As a result of its insurance policy coverage, the Company believes the fair value of each indemnification agreement will be minimal. The Company had no liabilities recorded for these agreements as of March 31, 2019 . Indemnifications Prior to the completion of the IPO, the Company historically participated in NETGEAR’s sales agreements. In its sales agreements, NETGEAR typically agrees to indemnify its direct customers, distributors and resellers (the “Indemnified Parties”) for any expenses or liability resulting from claimed infringements by NETGEAR’s products of patents, trademarks or copyrights of third parties that are asserted against the Indemnified Parties, subject to customary carve-outs. The terms of these indemnification agreements are generally perpetual after execution of the agreement. The maximum amount of potential future indemnification is generally unlimited. From time to time, the Company receives requests for indemnity and may choose to assume the defense of such litigation asserted against the Indemnified Parties. The Company had no liabilities recorded for these agreements as of March 31, 2019 . In connection with the Separation, and after July 1, 2018, certain sales agreements were transferred to the Company, and the Company has replaced certain shared contracts, which include similar indemnification terms. In addition, pursuant to the master separation agreement and certain other agreements entered into with NETGEAR in connection with the Separation and the IPO, NETGEAR has agreed to indemnify the Company for certain liabilities. The master separation agreement provides for cross-indemnities principally designed to place financial responsibility for the obligations and liabilities of its business with the Company and financial responsibility for the obligations and liabilities of NETGEAR’s business with NETGEAR. Under the intellectual property rights cross-license agreement entered into between the Company and NETGEAR, each party, in its capacity as a licensee, indemnifies the other party, in its capacity as a licensor, and its directors, officers, agents, successors and subsidiaries against any losses suffered by such indemnified party as a result of the indemnifying party’s practice of the intellectual property licensed to such indemnifying party under the intellectual property rights cross-license agreement. Also, under the tax matters agreement entered into between the Company and NETGEAR, each party is liable for, and indemnifies the other party and its subsidiaries from and against any liability for, taxes that are allocated to the indemnifying party under the tax matters agreement. In addition, the Company has agreed in the tax matters agreement that each party will generally be responsible for any taxes and related amounts imposed on it or NETGEAR as a result of the failure of the Distribution, together with certain related transactions, to qualify as a transaction that is generally tax-free, for U.S. federal income tax purposes, under Sections 355 and 368(a)(1)(D) and certain other relevant provisions of the Code, to the extent that the failure to so qualify is attributable to actions, events or transactions relating to such party’s respective stock, assets or business, or a breach of the relevant representations or covenants made by that party in the tax matters agreement. The transition services agreement generally provides that the applicable service recipient indemnifies the applicable service provider for liabilities that such service provider incurs arising from the provision of services other than liabilities arising from such service provider’s gross negligence, bad faith or willful misconduct or material breach of the transition services agreement, and that the applicable service provider indemnifies the applicable service recipient for liabilities that such service recipient incurs arising from such service provider’s gross negligence, bad faith or willful misconduct or material breach of the transition services agreement. Pursuant to the registration rights agreement, the Company has agreed to indemnify NETGEAR and its subsidiaries that hold registrable securities (and their directors, officers, agents and, if applicable, each other person who controls such holder under Section 15 of the Securities Act) registering shares pursuant to the registration rights agreement against certain losses, expenses and liabilities under the Securities Act, common law or otherwise. NETGEAR and its subsidiaries that hold registrable securities similarly indemnify the Company but such indemnification will be limited to an amount equal to the net proceeds received by such holder under the sale of registrable securities giving rise to the indemnification obligation. Refer to Note 1, The Company and Basis of Presentation , for details relating to the Company’s IPO and related transactions. Employment Agreements NETGEAR has signed various employment agreements with the Company’s key executives pursuant to which, if their employment is terminated without cause, such employees are entitled to receive their base salary (and commission or bonus, as applicable) for up to one year. Such employees will also continue to have equity awards vest for up to a one -year period following such termination without cause. If a termination without cause or resignation for good reason occurs within one year of a change in control, certain key employees are entitled to up to two years acceleration of any unvested portion of his or her equity awards. The Company had no liabilities recorded for these agreements as of March 31, 2019 . In connection with the completion of the IPO, the Company entered into executive confirmatory employment offer letters and change in control and severance agreements with each of the Company’s key executives, which superseded and replaced any employment arrangements that such executives had previously entered into with NETGEAR. Refer to Note 1, The Company and Basis of Presentation , for details relating to the Company’s IPO and related transactions. Environmental Regulation The Company is required to comply and is currently in compliance with the European Union (“EU”) and other Directives on the Restrictions of the use of Certain Hazardous Substances in Electrical and Electronic Equipment (“RoHS”), Waste Electrical and Electronic Equipment (“WEEE”) requirements, Energy Using Product (“EuP”) requirements, the REACH Regulation, Packaging Directive and the Battery Directive. The Company is subject to various federal, state, local, and foreign environmental laws and regulations, including those governing the use, discharge, and disposal of hazardous substances in the ordinary course of its manufacturing process. The Company believes that its current manufacturing and other operations comply in all material respects with applicable environmental laws and regulations; however, it is possible that future environmental legislation may be enacted or current environmental legislation may be interpreted to create an environmental liability with respect to its facilities, operations, or products.

Employee Benefit Plans

Employee Benefit Plans	3 Months Ended
	Mar. 31, 2019
Employee Benefits and Share-based Compensation, Noncash [Abstract]
Employee Benefit Plans	Employee Benefit Plans The Company grants options and RSUs under the 2018 Equity Incentive Plan (the “2018 Plan”), under which awards may be granted to all employees. Award vesting periods for this plan are generally four years. Options may be granted for periods of up to 10 years or such shorter term as may be provided in the agreement and at prices no less than 100% of the fair market value of Arlo’s common stock on the date of grant. Options granted under the 2018 Plan generally vest over four years , the first tranche at the end of 12 months and the remaining shares underlying the option vesting monthly over the remaining three years . The Company also granted to its Named Executive Officers (“NEOs”) options to purchase 2,781,249 shares of Arlo common stock (“IPO options”). As of March 31, 2019 , approximately 5.9 million shares were available for future grants under the 2018 Plan. Additionally, the Company sponsors an Employee Stock Purchase Plan (“ESPP”), pursuant to which eligible employees may contribute up to 15% of compensation, subject to certain income limits, to purchase shares of the Company’s common stock. The terms of the plan include a look-back feature that enables employees to purchase stock semi-annually at a price equal to 85% of the lesser of the fair market value at the beginning of the offering period or the purchase date. The duration of each offering period is generally six months. As of March 31, 2019 , approximately 2.2 million shares were available for issuance under the ESPP. On January 23, 2019, the Company registered an aggregate of up to 10,535,149 shares of the Company’s common stock on Registration Statement on Form S-8, including 9,792,677 shares issuable pursuant to the 2018 Plan (consisting of (i) 6,822,787 shares of the Company’s common stock issuable upon exercise or vesting of awards relating to NETGEAR common stock that converted into awards relating to the Company’s common stock upon the completion of the Distribution for issuance under the 2018 Plan plus (ii) 2,969,890 shares of the Company’s common stock that were automatically added to the shares authorized for issuance under the 2018 Plan on January 1, 2019 pursuant to an “evergreen” provision contained in the 2018 Plan) and 742,472 shares issuable pursuant to the Company’s 2018 ESPP that were automatically added to the shares authorized for issuance under the 2018 ESPP on January 1, 2019 pursuant to an “evergreen” provision contained in the 2018 ESPP. Option Activity Arlo’s stock option activity during the three months ended of March 31, 2019 was as follows: Number of shares Weighted Average Exercise Price Per Share (In thousands) (In dollars) Outstanding as of December 31, 2018 7,209 $ 12.08 Forfeited / Cancelled (468 ) $ 16.00 Outstanding as of March 31, 2019 6,741 $ 11.81 NETGEAR’s stock option activity for Arlo employees during the three months ended March 31, 2019 was as follows: Number of shares Weighted Average Exercise Price Per Share (In thousands) (In dollars) Outstanding as of December 31, 2018 283 $ 26.53 Exercised (33 ) $ 20.82 Outstanding as of March 31, 2019 250 $ 27.29 RSU Activity Arlo’s RSU activity during the three months ended of March 31, 2019 was as follows: Number of shares Weighted Average Grant Date Fair Value Per Share (In thousands) (In dollars) Outstanding as of December 31, 2018 3,141 $ 12.22 Granted 1,749 $ 7.43 Vested (476 ) $ 12.14 Forfeited / Cancelled (37 ) $ 10.12 Outstanding as of March 31, 2019 4,377 $ 10.33 NETGEAR’s RSU activity for Arlo employees during the three months ended March 31, 2019 was as follows: Number of shares Weighted Average Grant Date Fair Value Per Share (In thousands) (In dollars) Outstanding as of December 31, 2018 521 $ 34.89 Vested (81 ) $ 34.95 Forfeited / Cancelled (6 ) $ 35.75 Outstanding as of March 31, 2019 434 $ 34.86 The following table sets forth the weighted average assumptions used to estimate the fair value of Arlo’s purchase rights granted under Arlo’s ESPP for the three months ended March 31, 2019 and NETGEAR’s options granted and purchase rights granted under NETGEAR’s ESPP to Arlo employees during the three months ended April 1, 2018 . Three Months Ended Stock Options ESPP March 31, April 1, March 31, April 1, Expected life (in years) NA 4.4 0.5 0.5 Risk-free interest rate NA 2.32 % 2.49 % 1.81 % Expected volatility NA 30.9 % 97.6 % 37.1 % Dividend yield — — — — Stock-Based Compensation Expense The Company’s employees have historically participated in NETGEAR’s various stock-based plans, which are described below and represent the portion of NETGEAR’s stock-based plans in which Arlo employees participated. The Company’s unaudited condensed consolidated statements of income reflect compensation expense for these stock-based plans associated with the portion of NETGEAR’s plans in which Arlo employees participated. The following tables set forth stock-based compensation expense for Arlo employees and allocated charges deemed attributable to Arlo operations resulting from NETGEAR’s and Arlo’s RSUs and stock options, and the purchase rights under the NETGEAR’s ESPP included in the Company’s unaudited condensed consolidated statements of operations during the periods indicated: Three Months Ended March 31, 2019 April 1, 2018 Total Direct Indirect Total (In thousands) Cost of revenue $ 369 $ 46 $ 290 $ 336 Research and development 1,297 564 169 733 Sales and marketing 940 242 430 672 General and administrative 2,047 — 954 954 Total stock-based compensation $ 4,653 $ 852 $ 1,843 $ 2,695 The Company recognizes these compensation expense on a straight-line basis over the requisite service period of the award. As of March 31, 2019 , $20.5 million of unrecognized compensation cost related to Arlo’s stock options and IPO options was expected to be recognized over a weighted-average period of 3.1 years. $23.4 million of unrecognized compensation cost related to unvested Arlo’s RSUs was expected to be recognized over a weighted-average period of 2.6 years. As of March 31, 2019 , $0.9 million of unrecognized compensation cost related to NETGEAR’s stock options for Arlo employees was expected to be recognized over a weighted-average period of 2.3 years. $12.7 million of unrecognized compensation cost related to unvested NETGEAR’s RSUs for Arlo employees was expected to be recognized over a weighted-average period of 2.5 years.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The income tax provision for the three months ended March 31, 2019 , was $0.2 million , or an effective tax rate of (0.5)% . The income tax provision for the three months ended April 1, 2018 , was $0.3 million , or an effective tax rate of (6.32)% . During the three months ended March 31, 2019 , the Company sustained higher book losses than the same period in the prior year. The Company has a full valuation allowance on its U.S. federal and state deferred tax attributes. As a result, consistent with the prior year, the Company is unable to record a tax benefit on these losses because of uncertainty of future profitability. The decrease in tax expense for the three months ended March 31, 2019 compared to the three months ended April 1, 2018 , resulted primarily from the Company reporting a lower earnings in foreign jurisdictions in 2019 than in 2018.

Net Income (Loss) Per Share

Net Income (Loss) Per Share	3 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Net Income (Loss) Per Share	Net Income (Loss) Per Share Basic net income (loss) per share is computed by dividing the net income (loss) for the period by the weighted average number of common shares outstanding during the period. The weighted average number of shares outstanding for the basic and diluted net income (loss) per share for the periods prior to the completion of the IPO is based on the number of shares of Arlo common stock outstanding on August 2, 2018, the effective date of the registration statement relating to the IPO (the “IPO Registration Statement”). On that date, the Company issued 62,499,000 shares of common stock to the Company’s sole stockholder of record, NETGEAR (after which NETGEAR held 62,500,000 shares of common stock, which represented all of the then issued and outstanding common stock). Potentially dilutive common shares, such as common shares issuable upon exercise of stock options and vesting of restricted stock awards are typically reflected in the computation of diluted net income (loss) per share by application of the treasury stock method. For certain periods presented, due to the net losses reported, these potentially dilutive securities were excluded from the computation of diluted net loss per share, since their effect would be anti-dilutive. Net loss per share for the three months ended March 31, 2019 and April 1, 2018 were as follows: Three Months Ended March 31, 2019 April 1, 2018 (In thousands, except per share data) Numerator: Net loss $ (41,284 ) $ (5,363 ) Denominator: Weighted average common shares - basic 74,409 62,500 Potentially dilutive common share equivalent — — Weighted average common shares - dilutive 74,409 62,500 Basic net loss per share $ (0.55 ) $ (0.09 ) Diluted net loss per share $ (0.55 ) $ (0.09 ) Anti-dilutive employee stock-based awards, excluded 10,030 —

Segment and Geographic Informat

Segment and Geographic Information	3 Months Ended
	Mar. 31, 2019
Segment Reporting [Abstract]
Segment and Geographic Information	Segment and Geographic Information Segment Information The Company operates as one operating and reportable segment. The Company has identified its CEO as the Chief Operating Decision Maker (“CODM”). The CODM reviews financial information presented on a combined basis for purposes of allocating resources and evaluating financial performance. Geographic Information The Company conducts business across three geographic regions: Americas, EMEA and APAC. Revenue consists of gross product shipments and service revenue, less allowances for estimated sales returns, price protection, end-user customer rebates and other channel sales incentives deemed to be a reduction of revenue per the authoritative guidance for revenue recognition, and net changes in deferred revenue. For reporting purposes, revenue by geography is generally based upon the ship-to location of the customer for device sales and device location for service sales. The following table shows revenue by geography for the periods indicated: Three Months Ended March 31, April 1, (In thousands) United States (U.S.) $ 41,803 $ 72,444 Americas (excluding U.S.) 2,563 2,279 EMEA 9,302 19,266 APAC 4,212 6,649 Total revenue $ 57,880 $ 100,638 The Company’s Property and equipment, net are located in the following geographic locations: As of March 31, December 31, (In thousands) United States (“U.S.”) $ 24,755 $ 45,053 Americas (excluding U.S.) 240 218 EMEA 556 567 China 2,574 3,040 APAC (excluding China) 863 550 Total property and equipment, net $ 28,988 $ 49,428

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2019
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The unaudited condensed combined financial statements of Arlo that cover periods ending or as of dates prior to the completion of the IPO have been derived and carved out from the consolidated financial statements and accounting records of NETGEAR as if Arlo had operated on a stand-alone basis within the periods presented. In connection with the Separation and IPO, certain assets and liabilities presented have been transferred to Arlo at carry-over (historical cost) basis. Balances contributed by NETGEAR on or before the completion of the IPO were based on the master separation agreement between the Company and NETGEAR and related documents governing the Contribution. Following the completion of the IPO, the unaudited condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All periods presented have been accounted for in conformity with U.S. Generally Accepted Accounting Principles (“U.S. GAAP”) and pursuant to the regulations of the U.S. Securities and Exchange Commission (“SEC”).
Fiscal periods	Fiscal periods The Company’s fiscal year begins on January 1 of the year stated and ends on December 31 of the same year. The Company reports its results on a fiscal quarter basis rather than on a calendar quarter basis. Under the fiscal quarter basis, each of the first three fiscal quarters ends on the Sunday closest to the calendar quarter end, with the fourth quarter ending on December 31.
Use of estimates	Use of estimates The preparation of these unaudited condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reported periods. Management bases its estimates on various assumptions believed to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities.
Recent accounting pronouncements	Recent accounting pronouncements Emerging Growth Company Status As an emerging growth company (“EGC”), the Jumpstart Our Business Startups Act (“JOBS Act”) allows the Company to delay adoption of new or revised accounting pronouncements applicable to public companies until such pronouncements are made applicable to private companies, unless the Company otherwise irrevocably elects not to avail itself of this exemption. The Company did not make such an irrevocable election and has not delayed the adoption of any applicable accounting standards. Accounting Pronouncements Recently Adopted ASU 2016-02 In February 2016, the Financial Accounting Standards Board (“FASB”) issued ASU 2016-02, “Leases” (Topic 842), which requires lessees to recognize on the balance sheets a ROU asset, representing its right to use the underlying asset for the lease term, and a corresponding lease liability for all leases with terms greater than 12 months. The liability will be equal to the net present value of minimum lease payments while the ROU asset will be based on the liability, subject to adjustment, such as for initial direct costs. On January 1, 2019 (“adoption date”), the Company adopted the new standard utilizing the modified retrospective transition method through a cumulative-effect adjustment at the beginning of the first fiscal quarter of 2019. The Company has elected the package of practical expedients, which allows the Company not to reassess (1) whether an expired or existing contracts as of adoption date contain a lease, (2) lease classification for any expired or existing lease as of the adoption date and (3) initial direct costs for any existing lease as of the adoption date. The Company also elected to account for each separate lease component of a contract and its associated non-lease components as a single lease component. The adoption of ASU 2016-02 resulted in the recognition of ROU assets and lease liabilities for operating leases of $14.4 million as of January 1, 2019 on its unaudited condensed consolidated balance sheets, with no material impact its consolidated statements of operations and cash flows. In addition, the Company was deemed to be the accounting owner of its build-to-suit lease arrangement for its San Jose corporate headquarters and the construction was in progress at adoption date. As such, the Company reevaluated its build-to-suit lease arrangement under ASU 2016-02 to ascertain whether it meets the criteria as the accounting owner of the build-to-suit lease arrangement through control of the underlying leased asset. The Company concluded that it did not have control over the underlying leased asset. As a result, the Company de-recognized the build to suit asset and liability as of adoption date of $21.6 million of Property and equipment and $21.9 million of financing lease obligations. The difference of $0.3 million between the de-recognized assets and the financing lease obligations was recorded as an adjustment to Accumulated deficit as of adoption date as mentioned above. The Company accounted for its San Jose Corporate lease arrangement as operating lease under ASU 2016-02. Consequently, as of March 31, 2019, the construction of its leasehold improvements for its San Jose corporate headquarters was partially completed and partially occupied by the Company resulting in lease commencement for the portion that was completed and occupied by the Company. Therefore as of March 31, 2019, the Company proportionally recorded an estimated value of ROU assets and lease liabilities of $14.3 million representing two thirds of the value of the ROU and lease liabilities. Upon expected completion of the leasehold improvements in the second quarter of fiscal 2019, the Company will recognize the remaining estimated value of ROU and lease liabilities of approximately $7.2 million . Refer to Note 8. Commitments and Contingencies , for further details of the impacts on the adoption. Accounting Pronouncements Not Yet Effective ASU 2016-13 In June 2016, the FASB issued ASU 2016-13, “Measurement of Credit Losses on Financial Instruments” (Topic 326), which replaces the incurred-loss impairment methodology and requires immediate recognition of estimated credit losses expected to occur for most financial assets, including trade receivables. ASU 2016-13 is effective for the Company beginning in the first fiscal quarter of 2021 (or the first fiscal quarter of 2020 should the Company cease to be classified as an EGC), with early adoption permitted. The Company continues to assess the potential impact of the new guidance, but does not expect it to have a material impact on its financial position, results of operations, or cash flows. With the exception of the new standards discussed above, there have been no other new accounting pronouncements that have significance, or potential significance, to the Company’s financial position, results of operations, or cash flows.
Leases	Leases The Company determines if an arrangement is a lease at inception. Operating leases are included in operating lease right-of-use (“ROU”) assets, accrued liabilities, and non-current operating lease liabilities in the unaudited condensed consolidated balance sheets. Leases with an initial term of 12 months or less are not recorded on the balance sheet. Lease expense for lease payments are recognized in the unaudited condensed consolidated statements of operations on a straight-line basis over the lease term and variable lease payments in the period in which the obligation for those payments is incurred. ROU assets represent the Company’s right to use an underlying asset over the lease term and lease liabilities represent its obligation to make lease payments arising from the lease. Operating lease ROU assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. As most of the leases do not provide an implicit rate, the incremental borrowing rate based on the information available was used at commencement date in determining the present value of lease payments. The Company uses the implicit rate when readily determinable. The operating lease ROU asset also includes any lease payments made before the lease commencement date less any lease incentives received. The lease terms may include options to extend or terminate the lease when it is reasonably certain that the Company will exercise the options. The lease agreements with lease and non-lease components are generally accounted as a single component.
Fair Value of Financial Instruments	The Company’s investments in cash equivalents and available-for-sale securities are classified within Level 1 of the fair value hierarchy because they are valued based on quoted market prices in active markets. The Company enters into foreign currency forward contracts with only those counterparties that have long-term credit ratings of A-/A3 or higher. The Company’s foreign currency forward contracts are classified within Level 2 of the fair value hierarchy as they are valued using pricing models that take into account the contract terms as well as currency rates and counterparty credit rates. The Company verifies the reasonableness of these pricing models using observable market data for related inputs into such models. Additionally, the Company includes an adjustment for non-performance risk in the recognized measure of fair value of derivative instruments. As of March 31, 2019 , the adjustment for non-performance risk did not have a material impact on the fair value of the Company’s foreign currency forward contracts. The carrying value of non-financial assets and liabilities measured at fair value in the financial statements on a recurring basis, including accounts receivable and accounts payable, approximate fair value due to their short maturities.

Balance Sheet Components (Table

Balance Sheet Components (Tables)	3 Months Ended
	Mar. 31, 2019
Balance Sheet Related Disclosures [Abstract]
Schedule of Cash and Cash Equivalents	The following table totals cash and cash equivalents and restricted cash as reported on the consolidated balance sheet as of March 31, 2019 and December 31, 2018 , and the sum is presented on the consolidated statements of cash flows: As of March 31, December 31, (In thousands) Cash and cash equivalents $ 135,582 $ 151,290 Restricted cash 4,133 4,134 Total as presented on the consolidated statements of cash flows $ 139,715 $ 155,424
Restrictions on Cash and Cash Equivalents	The following table totals cash and cash equivalents and restricted cash as reported on the consolidated balance sheet as of March 31, 2019 and December 31, 2018 , and the sum is presented on the consolidated statements of cash flows: As of March 31, December 31, (In thousands) Cash and cash equivalents $ 135,582 $ 151,290 Restricted cash 4,133 4,134 Total as presented on the consolidated statements of cash flows $ 139,715 $ 155,424
Available-for-sale short-term investments	Available-for-sale short-term investments As of March 31, 2019 As of December 31, 2018 Cost Unrealized Gains Unrealized Losses Estimated Fair Value Cost Unrealized Gains Unrealized Losses Estimated Fair Value (In thousands) U.S. treasuries $ 44,773 $ 19 $ — $ 44,792 $ 49,739 $ 2 $ (4 ) $ 49,737
Schedule of Accounts Receivable, Net	Accounts receivable, net As of March 31, December 31, (In thousands) Gross accounts receivable $ 71,998 $ 166,172 Allowance for doubtful accounts (432 ) (127 ) Total accounts receivable, net $ 71,566 $ 166,045
Schedule of Property and Equipment, Net	Property and equipment, net The components of property and equipment are as follows: As of March 31, December 31, (In thousands) Machinery and equipment $ 11,447 $ 11,415 Leasehold improvements (1) 2,917 3,007 Software 10,628 10,624 Computer equipment 3,824 4,342 Furniture and fixtures 1,180 2,698 Construction in progress (1) 12,095 28,357 Total property and equipment, gross 42,091 60,443 Accumulated depreciation and amortization (13,103 ) (11,015 ) Total property and equipment, net $ 28,988 $ 49,428 _________________________ (1) The Company had a build-to-suit lease arrangement under its corporate headquarters lease in San Jose, California. Upon the adoption of ASU 2016-02, the Company concluded that it did not have control over the underlying leased asset and de-recognized $21.6 million of Construction of progress. Refer to Note 8, Commitments and Contingencies , for further details.
Schedule of Intangibles, Net	Intangibles, net As of March 31, 2019 As of December 31, 2018 Gross Accumulated Amortization Net Gross Accumulated Amortization Net (In thousands) Technology $ 9,800 $ (7,508 ) $ 2,292 $ 9,800 $ (7,165 ) $ 2,635 Other 500 (350 ) 150 800 (612 ) 188 Total intangibles, net $ 10,300 $ (7,858 ) $ 2,442 $ 10,600 $ (7,777 ) $ 2,823
Schedule of Estimated Amortization Expense Related to Intangibles	As of March 31, 2019 , estimated amortization expense related to finite-lived intangibles for the remaining years was as follows (in thousands): 2019 (remaining nine months) $ 1,136 2020 1,306 Total estimated amortization expense $ 2,442
Schedule of Goodwill	There was no change in the carrying amount of goodwill during the three months ended March 31, 2019 and the goodwill as of December 31, 2018 and March 31, 2019 was as follows (in thousands): As of December 31, 2018 $ 15,638 As of March 31, 2019 $ 15,638
Schedule of Other Non-Current Assets	Other non-current assets As of March 31, December 31, 2018 (In thousands) Non-current deferred income taxes $ 1,121 $ 1,108 Deposits 3,484 4,084 Other 3,117 3,257 Total other non-current assets $ 7,722 $ 8,449
Schedule of Other Accrued Liabilities	Accrued liabilities As of March 31, December 31, (In thousands) Sales and marketing $ 54,011 $ 75,863 Sales returns 30,804 49,247 Warranty obligation 3,201 3,712 Accrued employee compensation 8,626 11,897 Freight 1,300 3,913 Current financing lease obligation — 1,632 Other 21,113 25,772 Total accrued liabilities $ 119,055 $ 172,036

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value, Assets and Liabilities Measured on Recurring Basis	The following tables summarize assets and liabilities measured at fair value on a recurring basis as of March 31, 2019 : Total Quoted market prices in active markets (Level 1) Significant other observable inputs (Level 2) (In thousands) Assets: Cash equivalents: U.S. treasuries (<90 days) $ 5,722 $ 5,722 $ — Available-for-sale securities: U.S. treasuries (1) 44,792 44,792 — Foreign currency forward contracts (2) 288 — 288 Total assets measured at fair value $ 50,802 $ 50,514 $ 288 Liabilities: Foreign currency forward contracts (3) $ 43 $ — $ 43 Total liabilities measured at fair value $ 43 $ — $ 43 _________________________ (1) Included in Short-term investments on the Company’s unaudited condensed consolidated balance sheets. (2) Included in Prepaid expenses and other current assets on the Company’s unaudited condensed consolidated balance sheets. (3) Included in Accrued liabilities on the Company’s unaudited condensed consolidated balance sheets.

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Fair Values of the Company's Derivative Instruments and the Line Items on the Consolidated Balance Sheets	The fair values of the Company’s derivative instruments and the line items on the unaudited condensed consolidated balance sheets to which they were recorded as of March 31, 2019 are summarized as follows: Derivative Assets Balance Sheet Location March 31, 2019 December 31, 2018 Balance Sheet Location March 31, 2019 December 31, 2018 (In thousands) (In thousands) Derivative assets not designated as hedging instruments Prepaid expenses and other current assets $ 242 $ 293 Other accrued liabilities $ 39 $ 46 Derivative assets designated as hedging instruments Prepaid expenses and other current assets 46 29 Other accrued liabilities 4 25 Total $ 288 $ 322 $ 43 $ 71
Schedule of Offsetting of Derivative Assets	The following tables set forth the offsetting of derivative assets as of March 31, 2019 and December 31, 2018: As of March 31, 2019 Gross Amounts Not Offset in the Unaudited Condensed Consolidated Balance Sheets Gross Amounts of Recognized Assets Gross Amounts Offset in the Unaudited Condensed Consolidated Balance Sheets Net Amounts Of Assets Presented in the Unaudited Condensed Consolidated Balance Sheets Financial Instruments Cash Collateral Pledged Net Amount (In thousands) HSBC $ 210 $ — $ 210 $ (24 ) $ — $ 186 JP Morgan 75 — 75 (19 ) — 56 Wells Fargo Bank 3 — 3 — — 3 Total $ 288 $ — $ 288 $ (43 ) $ — $ 245 As of December 31, 2018 Gross Amounts Not Offset in the Unaudited Condensed Consolidated Balance Sheets Gross Amounts of Recognized Assets Gross Amounts Offset in the Unaudited Condensed Consolidated Balance Sheets Net Amounts Of Assets Presented in the Unaudited Condensed Consolidated Balance Sheets Financial Instruments Cash Collateral Pledged Net Amount (In thousands) HSBC $ 100 $ — $ 100 $ — $ — $ 100 Wells Fargo Bank 222 — 222 (68 ) — 154 Total $ 322 $ — $ 322 $ (68 ) $ — $ 254
Schedule of Offsetting of Derivative Liabilities	As of March 31, 2019 Gross Amounts Not Offset in the Unaudited Condensed Consolidated Balance Sheets Gross Amounts of Recognized Liabilities Gross Amounts Offset in the Unaudited Condensed Consolidated Balance Sheets Net Amounts Of Liabilities Presented in the Unaudited Condensed Consolidated Balance Sheets Financial Instruments Cash Collateral Pledged Net Amount (In thousands) HSBC $ 24 $ — $ 24 $ (24 ) $ — $ — JP Morgan 19 — 19 (19 ) — — Total $ 43 $ — $ 43 $ (43 ) $ — $ — As of December 31, 2018 Gross Amounts Not Offset in the Unaudited Condensed Consolidated Balance Sheets Gross Amounts of Recognized Liabilities Gross Amounts Offset in the Unaudited Condensed Consolidated Balance Sheets Net Amounts Of Liabilities Presented in the Unaudited Condensed Consolidated Balance Sheets Financial Instruments Cash Collateral Pledged Net Amount (In thousands) JP Morgan $ 3 $ — $ 3 $ — $ — $ 3 Wells Fargo Bank 68 — 68 (68 ) — — Total $ 71 $ — $ 71 $ (68 ) $ — $ 3
Schedule of Locations of Gains or Losses Recognized in Income	The effects of the Company’s cash flow hedges on the unaudited condensed consolidated statements of operations for the three months ended March 31, 2019 are summarized as follows: Location and Amount of Gains (Losses) Recognized in Income on Cash Flow Hedges Revenue Cost of revenue Research and development Sales and marketing General and administrative (In thousands) Statements of operations $ 57,880 $ 55,935 $ 18,161 $ 14,221 $ 10,536 Gains (losses) on cash flow hedge $ 120 $ (1 ) $ (18 ) $ (11 ) $ (5 )
Schedule of Derivatives not Designated as Hedging Instruments	The effects of the Company’s non-designated hedge included in Other income (expense), net on the consolidated statements of operations for the year ended March 31, 2019 are as follows: Derivatives Not Designated as Hedging Instruments Location of Gains (Losses) Recognized in Income on Derivative Three Months Ended March 31, 2019 April 1, 2018 (In thousands) Foreign currency forward contracts Other income (expense), net $ 121 $ —

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income	The following table sets forth the changes in accumulated other comprehensive income (loss) (“AOCI”) by component for the three months ended March 31, 2019 : Unrealized gains (losses) on available-for-sale securities Unrealized gains (losses) on derivatives Estimated tax benefit (provision) Total (In thousands) Balance as of December 31, 2018 $ (2 ) $ 2 $ — $ — Other comprehensive income (loss) before reclassifications 21 125 (5 ) 141 Less: Amount reclassified from accumulated other comprehensive income (loss) — 85 — 85 Net current period other comprehensive income (loss) 21 40 (5 ) 56 Balance as of March 31, 2019 $ 19 $ 42 $ (5 ) $ 56
Schedule of Reclassification out of Accumulated Other Comprehensive Income (Loss)	The following tables provide details about significant amounts reclassified out of each component of AOCI for the three months ended March 31, 2019 : Gains (Losses) Recognized in OCI - Effective Portion Gains (Losses) Reclassified from OCI to Income - Effective Portion Affected Line Item in the Statements of Operations (In thousands) Gains (losses) on cash flow hedge: Foreign currency contracts $ 125 $ 120 Revenue Foreign currency contracts (1 ) Cost of revenue Foreign currency contracts (18 ) Research and development Foreign currency contracts (11 ) Sales and marketing Foreign currency contracts (5 ) General and administrative $ 85 Total * _________________________ * Tax impact to hedging gains and losses from derivative contracts was immaterial.

Deferred Revenue (Tables)

Deferred Revenue (Tables)	3 Months Ended
	Mar. 31, 2019
Revenue from Contract with Customer [Abstract]
Schedule of Remaining Performance Obligations	The following table includes estimated revenue expected to be recognized in the future related to performance obligations that are unsatisfied (or partially unsatisfied) as of March 31, 2019 : 1 year 2 years Greater than 2 years Total (In thousands) Performance obligations $ 41,385 $ 15,847 $ 6,580 $ 63,812

Commitments and Contingencies (

Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Effect on Financial Statements	Supplemental cash flow information related to operating leases for the three months ended March 31, 2019 was as follows (in thousands): Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases $ 756 Right-of-use assets obtained in exchange for lease liabilities Operating leases $ 14,559 Weighted average remaining lease term and weighted average discount rate related to operating leases for the three months ended March 31, 2019 were as follows: Weighted average remaining lease term 6.0 years Weighted average discount rate 5.58 % The operating lease expense for the three months ended March 31, 2019 was as follows: Statements of Operations Location March 31, 2019 (In thousands) Operating lease cost (1) General and administrative $ 863 ________________________ (1) Included short-term leases and variable lease costs which were immaterial.
Effect of Accounting Standard Adoption	ffect of accounting standards adoption of ASU 2016-02 on the unaudited condensed consolidated statement of balance sheets and supplemental balance sheet information related to operating leases as of March 31, 2019 were as follows: Leases Balance Sheet Location March 31, 2019 January 1, 2019 December 31, 2018 (In thousands) Build-to-suit lease (1) Property and equipment, net $ — $ (21,610 ) $ 21,610 Build-to-suit lease (1) Accrued liabilities — (281 ) 281 Build-to-suit lease (1) Accrued liabilities — (1,632 ) 1,632 Build-to-suit lease (1) Non-current financing lease obligation — (19,978 ) 19,978 Build-to-suit lease (1) Retained earnings (Accumulated deficit) 281 281 — Operating leases (2) Operating lease right-of-use assets 27,033 14,400 — Operating leases (2) Accrued liabilities — (107 ) 107 Operating leases (2) Accrued liabilities 3,135 2,356 — Operating leases (2) Non-current deferred rent — (1,141 ) 1,141 Operating leases (2) Non-current operating lease liabilities 25,256 12,044 — ________________________ (1) The Company was deemed to be the accounting owner of its build-to-suit lease arrangement for its San Jose corporate headquarters and the construction was in progress at adoption date. As such, the Company reevaluated its build-to-suit lease arrangement under ASU 2016-02 to ascertain whether it meets the criteria as the accounting owner of the build-to-suit lease arrangement through control of the underlying leased asset. The Company concluded that it did not have control over the underlying leased asset. As a result, the Company de-recognized the build to suit asset and liability as of adoption date of $21.6 million of Property and equipment and $21.9 million of financing lease obligations. The difference of $0.3 million between the de-recognized assets and the financing lease obligations was recorded as an adjustment to Accumulated deficit as of the adoption date. (2) The Company adopted ASU 2016-02 on January 1, 2019 which resulted in the recognition of ROU assets and lease liabilities for operating leases of $14.4 million on its unaudited condensed consolidated balance sheets. The ROU assets were reduced by $0.1 million current deferred rent and $1.1 million non-current deferred rent which have been de-recognized along with the adoption. As of March 31, 2019, the construction of the Company’s leasehold improvements for its San Jose corporate headquarters was partially completed and partially occupied by the Company, resulting in lease commencement inception for the portion that was completed and occupied by the Company. Therefore, the Company proportionally recorded an estimated value of ROU assets and lease liabilities of $14.3 million , representing two thirds of the value of the ROU and lease liabilities. Upon expected completion of the leasehold improvements in the second quarter of fiscal 2019, the Company will recognize the remaining estimated value of ROU and lease liabilities of approximately $7.2 million .
Summary of Operating Lease Maturity	aturity of lease liabilities related to operating leases for each of the next five years and thereafter as of March 31, 2019 was as follows (in thousands): 2019 (Remaining nine months) $ 3,167 2020 5,021 2021 4,864 2022 4,730 2023 4,023 Thereafter 13,786 Total lease payments 35,591 Less: interest (1) (7,200 ) Total $ 28,391 Accrued liabilities $ 3,135 Non-current operating lease liabilities 25,256 Total $ 28,391 ________________________ (1) Calculated using the Company’s incremental borrowing rate on a collateralized basis plus LIBOR rate that closely matches contractual term of most leases.
Summary of Future Minimum Lease Payments Before 842	As of December 31, 2018 , future minimum lease payments under non-cancelable operating leases and build-to-suit lease arrangements, for each of the next five years and thereafter were as follows (in thousands): Leases (1) 2019 $ 4,634 2020 5,813 2021 5,678 2022 5,580 2023 4,903 Thereafter 19,252 Total $ 45,860
Schedule of Changes in Warranty Obligation	Changes in the Company’s warranty liability, which is included in Accrued liabilities in the unaudited condensed consolidated balance sheets, were as follows: Three Months Ended March 31, April 1, (In thousands) Balance at the beginning of the period $ 3,712 $ 31,756 Reclassified to sales returns upon adoption of ASC 606 (1) — (28,713 ) Provision for warranty obligation made during the period — 633 Settlements made during the period (511 ) (189 ) Balance at the end of the period $ 3,201 $ 3,487 ________________________ (1) Upon adoption of ASC 606 on January 1, 2018, warranty reserve balances totaling $28.7 million were reclassified to sales returns as these liabilities are payable to the Company’s customers and settled in cash or by credit on account. Under ASC 606, these amounts are to be accounted for as sales with right of return.

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	3 Months Ended
	Mar. 31, 2019
Employee Benefits and Share-based Compensation, Noncash [Abstract]
Schedule of Stock Option Activity	Arlo’s stock option activity during the three months ended of March 31, 2019 was as follows: Number of shares Weighted Average Exercise Price Per Share (In thousands) (In dollars) Outstanding as of December 31, 2018 7,209 $ 12.08 Forfeited / Cancelled (468 ) $ 16.00 Outstanding as of March 31, 2019 6,741 $ 11.81 NETGEAR’s stock option activity for Arlo employees during the three months ended March 31, 2019 was as follows: Number of shares Weighted Average Exercise Price Per Share (In thousands) (In dollars) Outstanding as of December 31, 2018 283 $ 26.53 Exercised (33 ) $ 20.82 Outstanding as of March 31, 2019 250 $ 27.29
Schedule of RSU Activity	NETGEAR’s RSU activity for Arlo employees during the three months ended March 31, 2019 was as follows: Number of shares Weighted Average Grant Date Fair Value Per Share (In thousands) (In dollars) Outstanding as of December 31, 2018 521 $ 34.89 Vested (81 ) $ 34.95 Forfeited / Cancelled (6 ) $ 35.75 Outstanding as of March 31, 2019 434 $ 34.86 Arlo’s RSU activity during the three months ended of March 31, 2019 was as follows: Number of shares Weighted Average Grant Date Fair Value Per Share (In thousands) (In dollars) Outstanding as of December 31, 2018 3,141 $ 12.22 Granted 1,749 $ 7.43 Vested (476 ) $ 12.14 Forfeited / Cancelled (37 ) $ 10.12 Outstanding as of March 31, 2019 4,377 $ 10.33
Schedule of Weighted Average Assumptions	The following table sets forth the weighted average assumptions used to estimate the fair value of Arlo’s purchase rights granted under Arlo’s ESPP for the three months ended March 31, 2019 and NETGEAR’s options granted and purchase rights granted under NETGEAR’s ESPP to Arlo employees during the three months ended April 1, 2018 . Three Months Ended Stock Options ESPP March 31, April 1, March 31, April 1, Expected life (in years) NA 4.4 0.5 0.5 Risk-free interest rate NA 2.32 % 2.49 % 1.81 % Expected volatility NA 30.9 % 97.6 % 37.1 % Dividend yield — — — —
Schedule of Total Stock-Based Compensation Expense Resulting from Stock Options, Restricted Stock Awards, and the Employee Stock Purchase Plan	The following tables set forth stock-based compensation expense for Arlo employees and allocated charges deemed attributable to Arlo operations resulting from NETGEAR’s and Arlo’s RSUs and stock options, and the purchase rights under the NETGEAR’s ESPP included in the Company’s unaudited condensed consolidated statements of operations during the periods indicated: Three Months Ended March 31, 2019 April 1, 2018 Total Direct Indirect Total (In thousands) Cost of revenue $ 369 $ 46 $ 290 $ 336 Research and development 1,297 564 169 733 Sales and marketing 940 242 430 672 General and administrative 2,047 — 954 954 Total stock-based compensation $ 4,653 $ 852 $ 1,843 $ 2,695

Net Income (Loss) Per Share (Ta

Net Income (Loss) Per Share (Tables)	3 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Schedule of Net Income Per Share	Net loss per share for the three months ended March 31, 2019 and April 1, 2018 were as follows: Three Months Ended March 31, 2019 April 1, 2018 (In thousands, except per share data) Numerator: Net loss $ (41,284 ) $ (5,363 ) Denominator: Weighted average common shares - basic 74,409 62,500 Potentially dilutive common share equivalent — — Weighted average common shares - dilutive 74,409 62,500 Basic net loss per share $ (0.55 ) $ (0.09 ) Diluted net loss per share $ (0.55 ) $ (0.09 ) Anti-dilutive employee stock-based awards, excluded 10,030 —

Segment and Geographic Inform_2

Segment and Geographic Information (Tables)	3 Months Ended
	Mar. 31, 2019
Segment Reporting [Abstract]
Schedule of Net Revenue by Geography	The following table shows revenue by geography for the periods indicated: Three Months Ended March 31, April 1, (In thousands) United States (U.S.) $ 41,803 $ 72,444 Americas (excluding U.S.) 2,563 2,279 EMEA 9,302 19,266 APAC 4,212 6,649 Total revenue $ 57,880 $ 100,638
Schedule of Long-Lived Asset By Geographic Areas	The Company’s Property and equipment, net are located in the following geographic locations: As of March 31, December 31, (In thousands) United States (“U.S.”) $ 24,755 $ 45,053 Americas (excluding U.S.) 240 218 EMEA 556 567 China 2,574 3,040 APAC (excluding China) 863 550 Total property and equipment, net $ 28,988 $ 49,428

The Company and Basis of Pres_2

The Company and Basis of Presentation - Narrative (Details) $ / shares in Units, $ in Millions	Dec. 31, 2018shares	Dec. 17, 2018	Nov. 29, 2018shares	Aug. 07, 2018USD ($)$ / sharesshares	Apr. 01, 2018USD ($)	Aug. 02, 2018$ / sharesshares
Allocation of Corporate Expenses | NETGEAR
Subsidiary, Sale of Stock [Line Items]
Purchases from related party					$ 13.8
Research and development | Allocation of Corporate Expenses | NETGEAR
Subsidiary, Sale of Stock [Line Items]
Purchases from related party					4.3
Sales and marketing | Allocation of Corporate Expenses | NETGEAR
Subsidiary, Sale of Stock [Line Items]
Purchases from related party					4.6
General and administrative | Allocation of Corporate Expenses | NETGEAR
Subsidiary, Sale of Stock [Line Items]
Purchases from related party					$ 4.9
IPO
Subsidiary, Sale of Stock [Line Items]
Common stock, issued (in shares) | shares				11,747,250		10,215,000
Stock price, common stock (in dollars per share) | $ / shares				$ 16		$ 16
Proceeds from initial public offering, net of offering costs				$ 173.4
Over-Allotment Option
Subsidiary, Sale of Stock [Line Items]
Common stock, issued (in shares) | shares				1,532,250
Arlo | IPO
Subsidiary, Sale of Stock [Line Items]
Proceeds from initial public offering, net of offering costs				$ 1.4
Payments for offering costs				4.6
NETGEAR | IPO
Subsidiary, Sale of Stock [Line Items]
Payments for offering costs				$ 3.2
Percentage of shares owned				84.20%
NETGEAR | Special Stock Dividend Distribution
Subsidiary, Sale of Stock [Line Items]
Number of shares authorized (in shares) | shares			62,500,000
Ratio of Arlo to NETGEAR common stock (as a ratio)		1.980295
Number of shares issued (in shares) | shares	62,500,000

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets		$ 27,033
Total property and equipment, gross		42,091		$ 60,443
Operating lease liability		28,391
Property and equipment, net		28,988		49,428
Accumulated deficit		(86,852)		(45,849)
Build-to-suit lease
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property and equipment, net		0		$ 21,610
Accumulated deficit		281
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets		14,300	$ 14,400
Operating lease liability		$ 14,300	14,400
Accounting Standards Update 2016-02 | Forecast
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets	$ 7,200
Operating lease liability	$ 7,200
Accounting Standards Update 2016-02 | Build-to-suit lease
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property and equipment, net			(21,610)
Finance lease liability			(21,900)
Accumulated deficit			$ 281

Balance Sheet Components Balanc

Balance Sheet Components Balance Sheet Components (Schedule of Cash, Cash Equivalents and Restricted Cash) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Apr. 01, 2018	Dec. 31, 2017
Balance Sheet Related Disclosures [Abstract]
Cash and cash equivalents	$ 135,582	$ 151,290
Restricted cash	4,133	4,134
Total as presented on the consolidated statements of cash flows	$ 139,715	$ 155,424	$ 178	$ 108

Balance Sheet Components (Sched

Balance Sheet Components (Schedule of Available-for-Sale Short-Term Investments) (Details) - U.S. treasuries - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Debt Securities, Available-For-Sale [Line Items]
Cost	$ 44,773	$ 49,739
Unrealized Gains	19	2
Unrealized Losses	0	(4)
Estimated Fair Value	$ 44,792	$ 49,737

Balance Sheet Components (Sch_2

Balance Sheet Components (Schedule of Accounts Receivable and Related Allowances) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Balance Sheet Related Disclosures [Abstract]
Gross accounts receivable	$ 71,998	$ 166,172
Allowance for doubtful accounts	(432)	(127)
Total accounts receivable, net	$ 71,566	$ 166,045

Balance Sheet Components (Sch_3

Balance Sheet Components (Schedule of Property and Equipment, Net) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Total property and equipment, gross	$ 42,091		$ 60,443
Accumulated depreciation and amortization	(13,103)		(11,015)
Machinery and equipment
Total property and equipment, gross	11,447		11,415
Leasehold improvements
Total property and equipment, gross	2,917		3,007
Software
Total property and equipment, gross	10,628		10,624
Computer equipment
Total property and equipment, gross	3,824		4,342
Furniture and fixtures
Total property and equipment, gross	1,180		2,698
Construction in progress
Total property and equipment, gross	$ 12,095
Construction in progress | Build-to-suit lease
Total property and equipment, gross			$ 28,357
Construction in progress | Accounting Standards Update 2016-02
Total property and equipment, gross		$ (21,600)

Balance Sheet Components (Prope

Balance Sheet Components (Property and Equipment, Other Information) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Balance Sheet Related Disclosures [Abstract]
Depreciation expense	$ 2	$ 0.5
Depreciation expense allocated from NETGEAR		$ 0.7

Balance Sheet Components (Sch_4

Balance Sheet Components (Schedule of Intangibles, Net) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Intangible Assets [Line Items]
Gross	$ 10,300	$ 10,600
Accumulated Amortization	(7,858)	(7,777)
Net	2,442	2,823
Technology
Intangible Assets [Line Items]
Gross	9,800	9,800
Accumulated Amortization	(7,508)	(7,165)
Net	2,292	2,635
Other
Intangible Assets [Line Items]
Gross	500	800
Accumulated Amortization	(350)	(612)
Net	$ 150	$ 188

Balance Sheet Components (Intan

Balance Sheet Components (Intangibles, Other Information) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Balance Sheet Related Disclosures [Abstract]
Acquired intangible assets, estimated useful life	1 year 7 months
Amortization of intangibles	$ 0.4	$ 0.4

Balance Sheet Components (Sch_5

Balance Sheet Components (Schedule of Estimated Amortization Expense Related to Intangibles) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Balance Sheet Related Disclosures [Abstract]
2019 (remaining nine months)	$ 1,136
2020	1,306
Net	$ 2,442	$ 2,823

Balance Sheet Components Bala_2

Balance Sheet Components Balance Sheet Components (Schedule of Goodwill) (Details) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Balance Sheet Related Disclosures [Abstract]
Increase (decrease) in goodwill	$ 0
Goodwill	$ 15,638,000	$ 15,638,000

Balance Sheet Components Bala_3

Balance Sheet Components Balance Sheet Components (Goodwill Impairment Narrative) (Details)	Feb. 07, 2019USD ($)	Feb. 05, 2019$ / shares	Mar. 31, 2019USD ($)segment	Dec. 31, 2018USD ($)
Goodwill [Line Items]
Average cost per share (in usd per share) | $ / shares		$ 3.71
Decrease in average cost per share (as a percentage)		223.30%
Number of operating segments | segment			1
Number of reportable segments | segment			1
Fair value in excess of carrying amount (as a percentage)	29.80%
Decrease in stock price, estimated impairment loss | $	$ 15,600,000
Goodwill impairment | $			$ 0	$ 0
MPAP
Goodwill [Line Items]
Market participant acquisition premium	0.25
Fair value in excess of carrying amount (as a percentage)	27.20%
MPAP - Adjustment
Goodwill [Line Items]
Market participant acquisition premium	2.500

Balance Sheet Components (Sch_6

Balance Sheet Components (Schedule of Other Non-Current Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Balance Sheet Related Disclosures [Abstract]
Non-current deferred income taxes	$ 1,121	$ 1,108
Deposits	3,484	4,084
Other	3,117	3,257
Total other non-current assets	$ 7,722	$ 8,449

Balance Sheet Components (Sch_7

Balance Sheet Components (Schedule of Other Accrued Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Balance Sheet Related Disclosures [Abstract]
Sales and marketing	$ 54,011		$ 75,863
Sales returns	30,804		49,247
Warranty obligation	3,201		3,712
Accrued employee compensation	8,626		11,897
Freight	1,300		3,913
Current financing lease obligation	0
Current financing lease obligation			1,632
Other	21,113		25,772
Total accrued liabilities	$ 119,055	$ 172,036	$ 172,036

Fair Value Measurements (Summar

Fair Value Measurements (Summary of Valuation of Company's Financial Instruments by Various Levels) (Details) - Fair value, measurements, recurring $ in Thousands	Mar. 31, 2019USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents: U.S. treasuries	$ 5,722
Foreign currency forward contracts	288
Total assets measured at fair value	50,802
Foreign currency forward contracts	43
Total liabilities measured at fair value	43
Quoted market prices in active markets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents: U.S. treasuries	5,722
Foreign currency forward contracts	0
Total assets measured at fair value	50,514
Foreign currency forward contracts	0
Total liabilities measured at fair value	0
Significant other observable inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents: U.S. treasuries	0
Foreign currency forward contracts	288
Total assets measured at fair value	288
Foreign currency forward contracts	43
Total liabilities measured at fair value	43
U.S. treasuries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities: U.S. treasuries	44,792
U.S. treasuries | Quoted market prices in active markets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities: U.S. treasuries	44,792
U.S. treasuries | Significant other observable inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities: U.S. treasuries	$ 0

Derivative Financial Instrume_3

Derivative Financial Instruments (Narrative) (Details) - Foreign currency contracts $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)derivative_instrument
Derivative [Line Items]
Term of derivative contracts	6 months
Derivatives Not Designated as Hedging Instruments
Derivative [Line Items]
Number of derivatives entered into | derivative_instrument	5
Average size of derivative contracts | $	$ 2.4
Cash Flow Hedges
Derivative [Line Items]
Number of derivatives entered into | derivative_instrument	8
Average size of derivative contracts | $	$ 2.6
Minimum | Derivatives Not Designated as Hedging Instruments
Derivative [Line Items]
Term of derivative contracts	1 month
Maximum | Derivatives Not Designated as Hedging Instruments
Derivative [Line Items]
Term of derivative contracts	3 months

Derivative Financial Instrume_4

Derivative Financial Instruments (Schedule of Fair Values of the Company's Derivative Instruments and the Line Items on the Consolidated Balance Sheets) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Gross Amounts of recognized assets	$ 288	$ 322
Gross Amounts of recognized liabilities	43	71
Prepaid expenses and other current assets | Derivative assets not designated as hedging instruments
Derivatives, Fair Value [Line Items]
Gross Amounts of recognized assets	242	293
Prepaid expenses and other current assets | Derivative assets designated as hedging instruments
Derivatives, Fair Value [Line Items]
Gross Amounts of recognized assets	46	29
Other accrued liabilities
Derivatives, Fair Value [Line Items]
Gross Amounts of recognized liabilities	43	71
Other accrued liabilities | Derivative assets not designated as hedging instruments
Derivatives, Fair Value [Line Items]
Gross Amounts of recognized liabilities	39	46
Other accrued liabilities | Derivative assets designated as hedging instruments
Derivatives, Fair Value [Line Items]
Gross Amounts of recognized liabilities	$ 4	$ 25

Derivative Financial Instrume_5

Derivative Financial Instruments (Schedule of Offsetting of Derivative Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Offsetting of Derivative Assets [Line Items]
Gross Amounts of Recognized Assets	$ 288	$ 322
Gross Amounts Offset in the Unaudited Condensed Consolidated Balance Sheets	0	0
Net Amounts Of Assets Presented in the Unaudited Condensed Consolidated Balance Sheets	288	322
Gross Amounts Not Offset in the Unaudited Condensed Consolidated Balance Sheets: Financial Instruments	(43)	(68)
Gross Amounts Not Offset in the Unaudited Condensed Consolidated Balance Sheets: Cash Collateral Pledged	0	0
Net Amount	245	254
HSBC
Offsetting of Derivative Assets [Line Items]
Gross Amounts of Recognized Assets	210	100
Gross Amounts Offset in the Unaudited Condensed Consolidated Balance Sheets	0	0
Net Amounts Of Assets Presented in the Unaudited Condensed Consolidated Balance Sheets	210	100
Gross Amounts Not Offset in the Unaudited Condensed Consolidated Balance Sheets: Financial Instruments	(24)	0
Gross Amounts Not Offset in the Unaudited Condensed Consolidated Balance Sheets: Cash Collateral Pledged	0	0
Net Amount	186	100
JP Morgan
Offsetting of Derivative Assets [Line Items]
Gross Amounts of Recognized Assets	75
Gross Amounts Offset in the Unaudited Condensed Consolidated Balance Sheets	0
Net Amounts Of Assets Presented in the Unaudited Condensed Consolidated Balance Sheets	75
Gross Amounts Not Offset in the Unaudited Condensed Consolidated Balance Sheets: Financial Instruments	(19)
Gross Amounts Not Offset in the Unaudited Condensed Consolidated Balance Sheets: Cash Collateral Pledged	0
Net Amount	56
Wells Fargo Bank
Offsetting of Derivative Assets [Line Items]
Gross Amounts of Recognized Assets	3	222
Gross Amounts Offset in the Unaudited Condensed Consolidated Balance Sheets	0	0
Net Amounts Of Assets Presented in the Unaudited Condensed Consolidated Balance Sheets	3	222
Gross Amounts Not Offset in the Unaudited Condensed Consolidated Balance Sheets: Financial Instruments	0	(68)
Gross Amounts Not Offset in the Unaudited Condensed Consolidated Balance Sheets: Cash Collateral Pledged	0	0
Net Amount	$ 3	$ 154

Derivative Financial Instrume_6

Derivative Financial Instruments (Schedule of Offsetting of Derivative Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Offsetting of Derivative Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	$ 43	$ 71
Gross Amounts Offset in the Unaudited Condensed Consolidated Balance Sheets	0	0
Net Amounts Of Liabilities Presented in the Unaudited Condensed Consolidated Balance Sheets	43	71
Gross Amounts Not Offset in the Unaudited Condensed Consolidated Balance Sheets: Financial Instruments	(43)	(68)
Gross Amounts Not Offset in the Unaudited Condensed Consolidated Balance Sheets: Cash Collateral Pledged	0	0
Net Amount	0	3
HSBC
Offsetting of Derivative Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	24
Gross Amounts Offset in the Unaudited Condensed Consolidated Balance Sheets	0
Net Amounts Of Liabilities Presented in the Unaudited Condensed Consolidated Balance Sheets	24
Gross Amounts Not Offset in the Unaudited Condensed Consolidated Balance Sheets: Financial Instruments	(24)
Gross Amounts Not Offset in the Unaudited Condensed Consolidated Balance Sheets: Cash Collateral Pledged	0
Net Amount	0
JP Morgan
Offsetting of Derivative Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	19	3
Gross Amounts Offset in the Unaudited Condensed Consolidated Balance Sheets	0	0
Net Amounts Of Liabilities Presented in the Unaudited Condensed Consolidated Balance Sheets	19	3
Gross Amounts Not Offset in the Unaudited Condensed Consolidated Balance Sheets: Financial Instruments	(19)	0
Gross Amounts Not Offset in the Unaudited Condensed Consolidated Balance Sheets: Cash Collateral Pledged	0	0
Net Amount	$ 0	3
Wells Fargo Bank
Offsetting of Derivative Liabilities [Line Items]
Gross Amounts of Recognized Liabilities		68
Gross Amounts Offset in the Unaudited Condensed Consolidated Balance Sheets		0
Net Amounts Of Liabilities Presented in the Unaudited Condensed Consolidated Balance Sheets		68
Gross Amounts Not Offset in the Unaudited Condensed Consolidated Balance Sheets: Financial Instruments		(68)
Gross Amounts Not Offset in the Unaudited Condensed Consolidated Balance Sheets: Cash Collateral Pledged		0
Net Amount		$ 0

Derivative Financial Instrume_7

Derivative Financial Instruments (Schedule of Location and Amount of Gains or Losses Recognized in Income on Cash Flow Hedges) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Revenue	$ 57,880	$ 100,638
Cost of revenue	55,935	71,585
Research and development	18,161	12,025
Sales and marketing	14,221	11,212
General and administrative	10,536	$ 4,878
Foreign currency contracts | Gain (losses) on cash flow hedge
Derivative Instruments, Gain (Loss) [Line Items]
Revenue	125
Foreign currency contracts | Gain (losses) on cash flow hedge | Amount Reclassified from AOCI
Derivative Instruments, Gain (Loss) [Line Items]
Revenue	120
Cost of revenue	(1)
Research and development	(18)
Sales and marketing	(11)
General and administrative	$ (5)

Derivative Financial Instrume_8

Derivative Financial Instruments (Schedule of Derivatives not Designated as Hedging Instruments) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Other income (expense), net | Foreign currency contracts | Derivatives Not Designated as Hedging Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) on cash flow hedge	$ 121	$ 0

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) - Schedule of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
AOCI, before tax
Beginning balance	$ 269,502	$ 125,419
Net current period other comprehensive income (loss)	61	0
Ending balance	232,141	92,937
AOCI, Tax
Beginning balance, tax	0
Other comprehensive income (loss) before reclassifications, tax	(5)
Less: Amount reclassified from accumulated other comprehensive income (loss), tax	0
Net current period other comprehensive income (loss), tax	(5)
Ending balance, tax	(5)
AOCI, after tax
Other comprehensive income (loss) before reclassifications	141
Less: Amount reclassified from accumulated other comprehensive income (loss)	85
Total other comprehensive income, net of tax	56	$ 0
Unrealized gains (losses) on available-for-sale securities
AOCI, before tax
Beginning balance	(2)
Other comprehensive income (loss) before reclassifications	21
Less: Amount reclassified from accumulated other comprehensive income (loss)	0
Net current period other comprehensive income (loss)	21
Ending balance	19
Unrealized gains (losses) on derivatives
AOCI, before tax
Beginning balance	2
Other comprehensive income (loss) before reclassifications	125
Less: Amount reclassified from accumulated other comprehensive income (loss)	85
Net current period other comprehensive income (loss)	40
Ending balance	42
Total
AOCI, before tax
Beginning balance	0
Ending balance	$ 56

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Loss) - Reclassifications out of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Revenue	$ 57,880	$ 100,638
Cost of revenue	55,935	71,585
Research and development	18,161	12,025
Sales and marketing	14,221	11,212
General and administrative	10,536	$ 4,878
Tax impact	0
Gain (losses) on cash flow hedge | Foreign currency contracts
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Revenue	125
Amount Reclassified from AOCI | Foreign currency contracts
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	85
Amount Reclassified from AOCI | Gain (losses) on cash flow hedge | Foreign currency contracts
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Revenue	120
Cost of revenue	(1)
Research and development	(18)
Sales and marketing	(11)
General and administrative	$ (5)

Deferred Revenue (Schedule of R

Deferred Revenue (Schedule of Remaining Performance Obligations) (Details) $ in Thousands	Mar. 31, 2019USD ($)
Revenue from Contract with Customer [Abstract]
Performance obligations	$ 63,812
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-04-01
Revenue from Contract with Customer [Abstract]
Performance obligations	$ 41,385
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue from Contract with Customer [Abstract]
Performance obligations	$ 15,847
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue from Contract with Customer [Abstract]
Performance obligations	$ 6,580
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations, expected timing of satisfaction

Deferred Revenue (Narrative) (D

Deferred Revenue (Narrative) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)region
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue deferred due to unsatisfied performance obligations	$ 9.2
Revenue recognized for satisfaction of performance obligations over time	11.5
Recognized revenue that was included in contract liability balance at beginning of period	$ 8.6
Number of geographic regions in which the Company conducts business | region	3

Commitments and Contingencies_2

Commitments and Contingencies (Narrative) (Details) - USD ($)	3 Months Ended	9 Months Ended
	Mar. 31, 2019	Sep. 30, 2018	Dec. 31, 2018
Loss Contingencies [Line Items]
Option to extend lease (in years)	5 years
Option to terminate lease (in years)	1 year
Number of days for non-cancellation of purchase obligations prior to expected shipment date		30 days
Non-cancelable purchase commitments with suppliers			$ 28,100,000
Liabilities recorded for director and officer indemnification agreements	$ 0
Liabilities recorded for customers, distributors, and resellers indemnification agreements	$ 0
Continued vesting period after termination without cause (in years)	1 year
Liabilities for executive's employment agreements	$ 0
Loss on Long-term Purchase Commitment
Loss Contingencies [Line Items]
Loss liability from committed purchases	$ 2,900,000
Chief Executive Officer
Loss Contingencies [Line Items]
Number of years after change of control to trigger full accelerated vest of unvested portion of stock options (in years)	1 year
Other Key Executives
Loss Contingencies [Line Items]
Maximum number of years covered by accelerated vest for other key executives if term without cause is within one year of change in control (in years)	2 years
46 to 60 Days
Loss Contingencies [Line Items]
Percentage of cancelable orders		50.00%
31 to 45 Days
Loss Contingencies [Line Items]
Percentage of cancelable orders		25.00%
Letter of Credit
Loss Contingencies [Line Items]
Letters of credit outstanding	$ 3,600,000
Build-to-suit lease | Letter of Credit
Loss Contingencies [Line Items]
Letters of credit outstanding	$ 3,100,000
Minimum | 46 to 60 Days
Loss Contingencies [Line Items]
Required notice period prior to expected shipment date		46 days
Minimum | 31 to 45 Days
Loss Contingencies [Line Items]
Required notice period prior to expected shipment date		31 days
Maximum | 46 to 60 Days
Loss Contingencies [Line Items]
Required notice period prior to expected shipment date		60 days
Maximum | 31 to 45 Days
Loss Contingencies [Line Items]
Required notice period prior to expected shipment date		45 days

Commitments and Contingencies_3

Commitments and Contingencies (Summary of Operating Lease Cost) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)
Commitments and Contingencies Disclosure [Abstract]
Operating lease cost	$ 863

Commitments and Contingencies_4

Commitments and Contingencies (Summary of Effect of Accounting Standard Adoption) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total property and equipment, gross		$ 42,091		$ 60,443
Property and equipment, net		28,988		49,428
Accrued liabilities		3,135
Accrued liabilities		119,055		172,036	$ 172,036
Non-current financing lease obligation		0		19,978
Accumulated deficit		(86,852)		(45,849)
Operating lease right-of-use assets		27,033
Non-current operating lease liabilities		25,256
Operating lease liability		28,391
Build-to-suit lease
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property and equipment, net		0		21,610
Accrued liabilities		0		281
Accrued liabilities		0		1,632
Non-current financing lease obligation				19,978
Accumulated deficit		281
Operating leases
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accrued liabilities		0		107
Accrued liabilities		3,135		0
Operating lease right-of-use assets		27,033
Non-current deferred rent				$ 1,141
Non-current operating lease liabilities		25,256
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets		14,300	$ 14,400
Operating lease liability		$ 14,300	14,400
Current deferred rent			(100)
Noncurrent deferred rent			(1,100)
Accounting Standards Update 2016-02 | Forecast
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets	$ 7,200
Operating lease liability	$ 7,200
Accounting Standards Update 2016-02 | Build-to-suit lease
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property and equipment, net			(21,610)
Accrued liabilities			(281)
Accrued liabilities			(1,632)
Non-current financing lease obligation			(19,978)
Accumulated deficit			281
Finance lease liability			(21,900)
Accounting Standards Update 2016-02 | Operating leases
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accrued liabilities			(107)
Accrued liabilities			2,356
Operating lease right-of-use assets			14,400
Non-current deferred rent			(1,141)
Non-current operating lease liabilities			$ 12,044

Commitments and Contingencies_5

Commitments and Contingencies (Schedule of Supplemental Cash Flow Information) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$ 756
Right-of-use assets obtained in exchange for lease liabilities
Operating leases	$ 14,559

Commitments and Contingencies_6

Commitments and Contingencies (Summary of Weighted Averages Related to Operating Leases) (Details)	Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Weighted average remaining lease term	6 years
Weighted average discount rate	5.58%

Commitments and Contingencies_7

Commitments and Contingencies (Summary of Operating Lease Maturity) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Operating Leases, After Adoption of 842
2019 (Remaining nine months)	$ 3,167
2020	5,021
2021	4,864
2022	4,730
2023	4,023
Thereafter	13,786
Total lease payments	35,591
Less: interest	(7,200)
Total	28,391
Accrued liabilities	3,135
Non-current operating lease liabilities	$ 25,256
Operating Leases, Before Adoption of 842
2019		$ 4,634
2020		5,813
2021		5,678
2022		5,580
2023		4,903
Thereafter		19,252
Total		$ 45,860

Commitments and Contingencies_8

Commitments and Contingencies (Schedule of Changes in Warranty Obligation) (Details) - USD ($) $ in Thousands	Jan. 01, 2018	Mar. 31, 2019	Apr. 01, 2018
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance at the beginning of the period	$ 31,756	$ 3,712	$ 31,756
Reclassified to sales returns upon adoption of ASC 606 (1)	$ (28,700)	0	(28,713)
Provision for warranty obligation made during the period		0	633
Settlements made during the period		(511)	(189)
Balance at the end of the period		$ 3,201	$ 3,487

Employee Benefit Plans (Narrati

Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Millions	Jan. 23, 2019	Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reserved stock for issuance, common stock		5,900,000
Stock Compensation Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted during the period (in shares)	742,472
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted period (in years)		10 years
Total unrecognized compensation		$ 20.5
Weighted-average period of recognition of stock based compensation		3 years 1 month 5 days
Stock Options, IPO performance-based
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)		2,781,249
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation		$ 23.4
Weighted-average period of recognition of stock based compensation		2 years 6 months 20 days
2018 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted, vesting term (in years)		4 years
Granted during the period (in shares)	9,792,677
2018 Plan | ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares reserved (in shares)	10,535,149
Number of shares automatically added to shares authorized for issuance	2,969,890
2018 Plan | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted, vesting term (in years)		4 years
ESPP | ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum percentage of compensation contributed by employees		15.00%
percentage of stock price purchased at offering date (as a percentage)		85.00%
Number of shares purchased (in shares)		2,200,000
NETGEAR | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation		$ 0.9
Weighted-average period of recognition of stock based compensation		2 years 3 months 2 days
NETGEAR | RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation		$ 12.7
Weighted-average period of recognition of stock based compensation		2 years 5 months 20 days
NETGEAR | 2018 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares converted at distribution (in shares)	6,822,787
Tranche One | 2018 Plan | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted, vesting term (in years)		3 years

Employee Benefit Plans (Schedul

Employee Benefit Plans (Schedule of Stock Option Activity) (Details) - Stock Options shares in Thousands	3 Months Ended
	Mar. 31, 2019$ / sharesshares
Number of shares
Beginning balance (in shares) | shares	7,209
Cancelled (in shares) | shares	(468)
Ending balance (in shares) | shares	6,741
Weighted Average Exercise Price Per Share
Beginning balance (in dollars per share) | $ / shares	$ 12.08
Cancelled (in dollars per share) | $ / shares	16
Ending balance (in dollars per share) | $ / shares	$ 11.81
NETGEAR
Number of shares
Beginning balance (in shares) | shares	283
Exercised (in shares) | shares	(33)
Ending balance (in shares) | shares	250
Weighted Average Exercise Price Per Share
Beginning balance (in dollars per share) | $ / shares	$ 26.53
Exercised (in dollars per share) | $ / shares	20.82
Ending balance (in dollars per share) | $ / shares	$ 27.29

Employee Benefit Plans (Sched_2

Employee Benefit Plans (Schedule of RSU Activity) (Details) - RSUs shares in Thousands	3 Months Ended
	Mar. 31, 2019$ / sharesshares
Number of shares
Beginning balance (in shares) | shares	3,141
Granted (in shares) | shares	1,749
Vested (in shares) | shares	(476)
Cancelled (in shares) | shares	(37)
Ending balance (in shares) | shares	4,377
Weighted Average Grant Date Fair Value Per Share
Beginning Balance (in dollars per share) | $ / shares	$ 12.22
Granted (in dollars per share) | $ / shares	7.43
Vested (in dollars per share) | $ / shares	12.14
Cancelled (in dollars per share) | $ / shares	10.12
Ending Balance (in dollars per share) | $ / shares	$ 10.33
NETGEAR
Number of shares
Beginning balance (in shares) | shares	521
Vested (in shares) | shares	(81)
Cancelled (in shares) | shares	(6)
Ending balance (in shares) | shares	434
Weighted Average Grant Date Fair Value Per Share
Beginning Balance (in dollars per share) | $ / shares	$ 34.89
Vested (in dollars per share) | $ / shares	34.95
Cancelled (in dollars per share) | $ / shares	35.75
Ending Balance (in dollars per share) | $ / shares	$ 34.86

Employee Benefit Plans (Sched_3

Employee Benefit Plans (Schedule of Valuation and Expense Information) (Details)	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield	0.00%
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (in years)	6 months
Risk-free interest rate	2.49%
Expected volatility	97.60%
Dividend yield	0.00%
NETGEAR | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (in years)		4 years 5 months
Risk-free interest rate		2.32%
Expected volatility		30.93%
Dividend yield		0.00%
NETGEAR | ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (in years)		6 months
Risk-free interest rate		1.81%
Expected volatility		37.10%
Dividend yield		0.00%

Employee Benefit Plans (Sched_4

Employee Benefit Plans (Schedule of Total Stock-Based Compensation Expense Resulting from Stock Options, Restricted Stock Awards, and the Employee Stock Purchase Plan) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation		$ 2,695
Direct
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation	$ 4,653	852
Indirect
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation		1,843
Cost of revenue
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation		336
Cost of revenue | Direct
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation	369	46
Cost of revenue | Indirect
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation		290
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation		733
Research and development | Direct
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation	1,297	564
Research and development | Indirect
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation		169
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation		672
Sales and marketing | Direct
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation	940	242
Sales and marketing | Indirect
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation		430
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation		954
General and administrative | Direct
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation	$ 2,047	0
General and administrative | Indirect
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation		$ 954

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 220	$ 319
Effective tax rate	(0.50%)	(6.32%)

Net Income (Loss) Per Share (Sc

Net Income (Loss) Per Share (Schedule of Net Income Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	Aug. 02, 2018	Mar. 31, 2019	Apr. 01, 2018	Aug. 02, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock issued during period, common stock	62,499			62,500
Numerator:
Net loss		$ (41,284)	$ (5,363)
Denominator:
Weighted average common shares - basic (in shares)		74,409	62,500
Potentially dilutive common share equivalent (in shares)		0	0
Weighted average common shares - dilutive (in shares)		74,409	62,500
Basic net income per share (in dollars per share)		$ (0.55)	$ (0.09)
Diluted net income per share (in dollars per share)		$ (0.55)	$ (0.09)
Employee Stock-based Awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive employee stock-based awards, excluded		10,030	0

Segment and Geographic Inform_3

Segment and Geographic Information (Narrative) (Details)	3 Months Ended
	Mar. 31, 2019regionsegment
Segment Reporting [Abstract]
Number of reportable segments	1
Number of operating segments	1
Number of geographic regions in which the Company conducts business | region	3

Segment Information (Schedule o

Segment Information (Schedule of Net Revenue by Geographic Areas) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Segment Reporting Information [Line Items]
Revenue	$ 57,880	$ 100,638
United States (U.S.)
Segment Reporting Information [Line Items]
Revenue	41,803	72,444
Americas (excluding U.S.)
Segment Reporting Information [Line Items]
Revenue	2,563	2,279
EMEA
Segment Reporting Information [Line Items]
Revenue	9,302	19,266
Asia Pacific
Segment Reporting Information [Line Items]
Revenue	$ 4,212	$ 6,649

Segment Information (Schedule_2

Segment Information (Schedule of Long-Lived Asset by Geographic Areas) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Long-Lived Assets [Line Items]
Total property and equipment, net	$ 28,988	$ 49,428
United States (U.S.)
Long-Lived Assets [Line Items]
Total property and equipment, net	24,755	45,053
Americas (excluding U.S.)
Long-Lived Assets [Line Items]
Total property and equipment, net	240	218
EMEA
Long-Lived Assets [Line Items]
Total property and equipment, net	556	567
China
Long-Lived Assets [Line Items]
Total property and equipment, net	2,574	3,040
APAC (excluding China)
Long-Lived Assets [Line Items]
Total property and equipment, net	$ 863	$ 550

Uncategorized Items - arlo-2019

Label	Element	Value
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ (3,061,000)
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	281,000
Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	281,000
Net Parent Investment [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ (3,061,000)