iRobot (IRBT) 10-K 16 Feb 21 2020 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Billions	12 Months Ended
	Jan. 02, 2021	Jan. 29, 2021	Dec. 28, 2019
Document and Entity Information [Abstract]
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	IRBT
Security Exchange Name	NASDAQ
Entity Address, State or Province	MA
Entity Incorporation, State or Country Code	DE
Document Transition Report	false
Document Annual Report	true
Common Stock, Shares, Outstanding	28,183,668		28,352,390
Entity Registrant Name	iROBOT CORPORATION
Entity Central Index Key	0001159167
Document Type	10-K
Entity File Number	001-36414
Document Period End Date	Jan. 2, 2021
Amendment Flag	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--01-02
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float	$ 2.3
Entity Common Stock, Shares Outstanding		28,199,143
Entity Tax Identification Number	77-0259335
Entity Address, Address Line One	8 Crosby Drive
Entity Address, City or Town	Bedford
Entity Address, Postal Zip Code	01730
City Area Code	781
Local Phone Number	430-3000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
ICFR Auditor Attestation Flag	true

Cover

Cover	12 Months Ended
	Jan. 02, 2021
Cover [Abstract]
Documents Incorporated by Reference	The registrant intends to file a definitive Proxy Statement pursuant to Regulation 14A within 120 days of the end of the fiscal year ended January 2, 2021. Portions of such Proxy Statement are incorporated by reference into Part III of this Form 10-K.

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jan. 02, 2021	Dec. 28, 2019
Current assets:
Cash and cash equivalents	$ 432,635	$ 239,392
Short term investments	51,081	17,032
Accounts receivable, net	170,526	146,161
Inventory	181,756	157,347
Other current assets	45,223	34,285
Total current assets	881,221	594,217
Property and equipment, net	76,584	75,988
Operating lease right-of-use assets	43,682	47,478
Deferred tax assets	33,404	41,791
Goodwill	125,872	118,732
Intangible assets, net	9,902	12,352
Other assets	19,063	30,195
Total assets	1,189,728	920,753
Current liabilities:
Accounts payable	165,779	116,185
Accrued expenses	131,388	81,768
Deferred revenue and customer advances	10,400	4,549
Total current liabilities	307,567	202,502
Operating lease liabilities	50,485	54,928
Deferred tax liabilities	705	912
Other long-term liabilities	26,537	10,342
Total long-term liabilities	77,727	66,182
Total liabilities	385,294	268,684
Commitments and contingencies (Note 13)
Preferred stock, 5,000 shares authorized and none outstanding	0	0
Common stock, $0.01 par value; 100,000 shares authorized; 28,184 and 28,352 shares issued and outstanding, respectively	282	284
Additional paid-in capital	205,256	196,455
Retained earnings	599,389	452,321
Accumulated other comprehensive (loss) income	(493)	3,009
Total stockholders’ equity	804,434	652,069
Total liabilities and stockholders’ equity	$ 1,189,728	$ 920,753

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Jan. 02, 2021	Dec. 28, 2019
Statement of Financial Position [Abstract]
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)		$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	28,183,668	28,352,390
Common stock, shares outstanding	28,183,668	28,352,390

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Revenue	$ 1,430,390	$ 1,214,010	$ 1,092,584
Cost of product revenue	758,241	658,362	518,612
Amortization of acquired intangible assets	1,920	11,721	18,544
Total cost of revenue	760,161	670,083	537,156
Gross profit	670,229	543,927	555,428
Operating expenses:
Research and development	156,670	141,607	140,629
Selling and marketing	265,475	231,548	210,411
General and administrative	100,770	83,103	97,501
Amortization of acquired intangible assets	992	1,051	1,065
Total operating expenses	523,907	457,309	449,606
Operating income	146,322	86,618	105,822
Other income, net	41,593	12,215	2,800
Income before income taxes	187,915	98,833	108,622
Income tax expense	40,847	13,533	20,630
Net income	$ 147,068	$ 85,300	$ 87,992
Net income per share:
Basic	$ 5.23	$ 3.04	$ 3.18
Diluted	$ 5.14	$ 2.97	$ 3.07
Number of shares used in per share calculations:
Basic	28,101	28,097	27,692
Diluted	28,618	28,735	28,640

Consolidated Statement of Compr

Consolidated Statement of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 147,068	$ 85,300	$ 87,992
Other comprehensive income:
Net foreign currency translation adjustments	14,045	(3,435)	(5,896)
Net unrealized (losses) gains on cash flow hedges, net of tax	(13,932)	12,363	(327)
Net gains on cash flow hedge reclassified into earnings, net of tax	(3,587)	(1,418)	(499)
Net unrealized (losses) gains on marketable securities, net of tax	(28)	247	(18)
Total comprehensive income	$ 143,566	$ 93,057	$ 81,252

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-in Capital	Retained Earnings (Accumulated Deficit)	Retained Earnings (Accumulated Deficit)Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income (Loss)
Beginning balance, shares at Dec. 30, 2017			27,945,000
Beginning balance at Dec. 30, 2017	$ 470,327	$ 1,040	$ 279	$ 190,067	$ 277,989	$ 1,040	$ 1,992
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee stock plans	239,830		285,000
Issuance of common stock under employee stock plans	$ 10,366		$ 3	10,363
Vesting of restricted stock units			408,000
Vesting of restricted stock units	0		$ 4	(4)
Stock-based compensation	25,804			25,804
Stock withheld to cover tax withholdings requirements upon restricted stock vesting			(51,000)
Stock withheld to cover tax withholdings requirements upon restricted stock vesting	(3,532)		$ 0	(3,532)
Other comprehensive loss	(6,740)						(6,740)
Directors' deferred compensation	$ 65			65
Stock repurchases	(799,000)
Stock repurchases	$ (50,000)		$ (8)	(49,992)
Net income (loss)	87,992				87,992
Ending balance, shares at Dec. 29, 2018			27,788,000
Ending balance at Dec. 29, 2018	$ 535,322		$ 278	172,771	367,021		(4,748)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee stock plans	127,024		187,000
Issuance of common stock under employee stock plans	$ 7,147		$ 2	7,145
Vesting of restricted stock units			436,000
Vesting of restricted stock units	0		$ 5	(5)
Stock-based compensation	23,744			23,744
Stock withheld to cover tax withholdings requirements upon restricted stock vesting			(59,000)
Stock withheld to cover tax withholdings requirements upon restricted stock vesting	(7,277)		$ (1)	(7,276)
Other comprehensive loss	7,757						7,757
Directors' deferred compensation	76			76
Net income (loss)	$ 85,300				85,300
Ending balance, shares at Dec. 28, 2019	28,352,390		28,352,000
Ending balance at Dec. 28, 2019	$ 652,069		$ 284	196,455	452,321		3,009
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee stock plans	88,292		151,000
Issuance of common stock under employee stock plans	$ 5,584		$ 1	5,583
Vesting of restricted stock units			391,000
Vesting of restricted stock units	0		$ 4	(4)
Stock-based compensation	29,975			29,975
Stock withheld to cover tax withholdings requirements upon restricted stock vesting			46,000
Stock withheld to cover tax withholdings requirements upon restricted stock vesting	1,845		$ 0	1,845
Other comprehensive loss	(3,502)						(3,502)
Directors' deferred compensation	85			85
Stock repurchases			(664,000)
Stock repurchases	(25,000)		$ (7)	(24,993)
Net income (loss)	$ 147,068				147,068
Ending balance, shares at Jan. 02, 2021	28,183,668		28,184,000
Ending balance at Jan. 02, 2021	$ 804,434		$ 282	$ 205,256	$ 599,389		$ (493)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Cash flows from operating activities:
Net income	$ 147,068	$ 85,300	$ 87,992
Adjustments to reconcile net income to net cash provided by operating activities, net of the effects of acquisition:
Depreciation and amortization	34,762	37,159	36,574
Gain on equity investment	(43,817)	(8,439)	0
Stock-based compensation	29,975	23,744	25,804
Deferred income taxes, net	13,837	(11,118)	(10,848)
Other	6,467	7,267	1,837
Changes in operating assets and liabilities — (use) source
Accounts receivable	(21,893)	13,064	(23,920)
Inventory	(24,535)	7,307	(58,546)
Other assets	(15,804)	(3,310)	(8,533)
Accounts payable	48,699	(20,536)	22,470
Accrued expenses and other liabilities	57,289	(386)	(1,145)
Net cash provided by operating activities	232,048	130,052	71,685
Cash flows from investing activities:
Additions of property and equipment	(31,599)	(35,337)	(32,422)
Change in other assets	(4,150)	(5,436)	(2,363)
Proceeds from sale of equity investments	0	9,787	856
Cash paid for business acquisition, net of cash acquired	0	(2,817)	0
Purchases of investments	0	0	(6,438)
Sales and maturities of investments	13,500	12,880	14,000
Net cash used in investing activities	(22,249)	(20,923)	(26,367)
Cash flows from financing activities:
Proceeds from employee stock plans	5,584	7,147	10,366
Income tax withholding payment associated with restricted stock vesting	(1,845)	(7,277)	(3,532)
Stock repurchases	(25,000)	0	(50,000)
Net cash used in financing activities	(21,261)	(130)	(43,166)
Effect of exchange rate changes on cash and cash equivalents	4,705	20	(414)
Net increase in cash and cash equivalents	193,243	109,019	1,738
Cash and cash equivalents, at beginning of period	239,392	130,373	128,635
Cash and cash equivalents, at end of period	432,635	239,392	130,373
Supplemental disclosure of cash flow information
Cash paid for income taxes	$ 19,929	$ 22,582	$ 39,517

Nature of the Business

Nature of the Business	12 Months Ended
	Jan. 02, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of the Business	1. Nature of the Business

Revenue Recognition (Notes)

Revenue Recognition (Notes)	12 Months Ended
	Jan. 02, 2021
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer	3. Revenue Recognition The Company primarily derives its revenue from the sale of consumer robots and accessories. The Company sells products directly to consumers through online stores and indirectly through resellers and distributors. Revenue is recognized upon transfer of control of promised products or services to customers, generally as title and risk of loss pass, in an amount that reflects the consideration the Company expects to receive in exchange for those products or services. Revenue is recognized only to the extent that it is probable that a significant reversal of revenue will not occur and when collection is considered probable. Taxes collected from customers, which are subsequently remitted to governmental authorities, are excluded from revenue. Shipping and handling expenses are considered fulfillment activities and are expensed as incurred. The Company's consumer robots are highly dependent on, and interrelated with, the embedded software and cannot function without the software. As such, the consumer robots are accounted for as a single performance obligation, and the revenue is recognized at a point in time when the control is transferred to distributors, resellers or directly to end customers through online stores. For certain consumer robots with Wi-Fi capability ("connected robots"), each sale represents an arrangement with multiple promises consisting of the robot, downloadable free app, cloud services and potential future unspecified software upgrades. The Company has determined that the app, cloud services and potential future unspecified software upgrades represent one promised service to the customer to enhance the functionality and interaction with the robot (referred to collectively as "Cloud Services"). For contracts that contain multiple performance obligations, the transaction price is allocated to each performance obligation based on a relative standalone selling price ("SSP"). The Company estimates SSP for items that are not sold separately, using market data if available or analysis of the cost of providing the products or services plus a reasonable margin. The transaction price allocated to the robots is recognized as revenue at a point in time when control is transferred and when collection is considered probable. The transaction price allocated to the Cloud Services is deferred and recognized on a straight-line basis over the estimated term of the Cloud Services. For contracts with a duration of greater than one year, the transaction price allocated to performance obligations that are unsatisfied as of January 2, 2021 and December 28, 2019 was $11.5 million and $4.0 million, respectively . The Company does not disclose the value of unsatisfied performance obligations for contracts with an original expected duration of one year or less. The Company’s products generally carry a one-year or two-year limited warranty that promises customers that delivered products are as specified. The Company does not consider these assurance-type warranties as a separate performance obligation and therefore, the Company accounts for such warranties under ASC 460, "Guarantees." During the fourth quarter of 2020, the Company began offering its customers the option to purchase an extended warranty for a fee. Amounts paid for the extended warranty plans are deferred and recognized as revenue on a straight-line basis over the service period. The Company provides limited rights of returns for direct-to-consumer sales generated through its on-line stores and certain resellers and distributors. The Company records an allowance for product returns based on specific terms and conditions included in the customer agreements or based on historical experience and the Company's expectation of future returns. In addition, the Company may provide other credits or incentives which are accounted for as variable consideration when estimating the amount of revenue to recognize. Where appropriate, these estimates take into consideration relevant factors such as the Company’s historical experience, current contractual requirements, specific known market events and forecasted inventory level in the channels. Overall, these reserves reflect the Company’s best estimates, and the actual amounts of consideration ultimately received may differ from the Company’s estimates. Returns and credits are estimated at the time of sale and updated at the end of each reporting period as additional information becomes available. As of January 2, 2021, the Company has reserves for product returns of $64.3 million and other credits and incentives of $142.2 million. As of December 28, 2019, the Company had reserves for product returns of $55.2 million and other credits and incentives of $134.0 million. Revenue recognized during the years ended January 2, 2021 and December 28, 2019 related to performance obligations satisfied in a prior period was not material. Disaggregation of Revenue The following table provides information about disaggregated revenue by geographical region (in thousands): January 2, 2021 December 28, 2019 December 29, 2018 United States $ 744,648 $ 603,618 $ 560,995 EMEA 386,007 357,760 311,659 Japan 193,304 160,875 132,813 Other 106,431 91,757 87,117 Total revenue $ 1,430,390 $ 1,214,010 $ 1,092,584 Contract Balances The following table provides information about receivables and contract liabilities from contracts with customers (in thousands): January 2, 2021 December 28, 2019 Accounts receivable, net $ 170,526 $ 146,161 Contract liabilities 17,700 6,991 The Company invoices customers based upon contractual billing schedules, and accounts receivable are recorded when the right to consideration becomes unconditional. Contract liabilities include deferred revenue associated with the Cloud Services and extended warranty plans as well as prepayments received from customers in advance of product shipments. The change in the opening and closing balances of the Company’s contract assets and contract liabilities primarily results from the timing difference between the Company’s performance and the customer’s payment. During the years ended January 2, 2021 and December 28, 2019, the Company recogni zed $5.5 million

Leases (Notes)

Leases (Notes)	12 Months Ended
	Jan. 02, 2021
Leases [Abstract]
Lessee, Operating Leases [Text Block]	4. Leases The Company's leasing arrangements primarily consist of operating leases for its facilities which include corporate, sales and marketing and research and development offices and equipment under various non-cancelable lease arrangements. For leases with terms greater than 12 months, the Company records the related right-of-use asset and lease obligation at the present value of lease payments over the term. Leases with an initial term of 12 months or less are not recorded on the balance sheet. Lease expense is recognized on a straight-line basis over the lease term. The Company's leases typically include rental escalation clauses, renewal options and/or termination options that are factored into the determination of lease payments when appropriate. The Company does not separate lease and nonlease components of contracts and excludes all variable lease payments from the measurement of right-of-use assets and lease liabilities. The Company's variable lease payments generally include usage based nonlease components. The Company's lease agreements do not contain any residual value guarantees or restrictive covenants. The Company's existing leases do not provide a readily determinable implicit rate. Therefore, the Company estimates its incremental borrowing rate to discount the lease payments based on information available at December 30, 2018 (date of initial application) or the lease commencement date for new leases post adoption. At January 2, 2021, the Company's weighted average discount rate was 3.56% , while the weighted average remaining lease term was 8.30 years . The components of lease expense were as follows (in thousands): January 2, 2021 December 28, 2019 Operating lease cost $ 9,363 $ 8,777 Variable lease cost 3,583 4,096 Total lease cost $ 12,946 $ 12,873 Supplemental cash flow information related to leases was as follows (in thousands): January 2, 2021 December 28, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 9,862 $ 9,540 Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 2,310 $ 53,227 Maturities of operating lease liabilities were as follows as of January 2, 2021 (in thousands): 2021 $ 8,226 2022 8,633 2023 7,647 2024 6,590 2025 6,612 Thereafter 28,539 Total minimum lease payments $ 66,247 Less: imputed interest 9,447 Present value of future minimum lease payments $ 56,800 Less: current portion of operating lease liabilities (Note 7) 6,315 Long-term lease liabilities $ 50,485 Financial Statement Impact of Adopting ASC 842 The Company adopted ASC 842 effective December 30, 2018 using the alternative transition method. Under this alternative transition method, a company is permitted to use its effective date as the date of initial application without restating comparative period financial statements. The Company elected the package of practical expedients permitted under the transition guidance, which allowed the Company to carryforward its historical assessments of (1) whether contracts are or contain leases, (2) lease classification and (3) initial direct costs. In addition, the Company elected the practical expedient to use hindsight in determining lease term. The adoption of the new standard resulted in the recognition of right-of-use assets and lease liabilities of approximately $52.8 million and $67.3 million, respectively. The standard did not materially impact the Company's consolidated income or cash flows.

Property and Equipment

Property and Equipment	12 Months Ended
	Jan. 02, 2021
Property, Plant and Equipment [Abstract]
Property and Equipment	5. Property and Equipment Property and equipment consists of the following (in thousands): January 2, December 28, Computer and equipment $ 13,617 $ 13,588 Furniture and fixtures 8,394 6,494 Machinery and tooling 80,715 79,213 Leasehold improvements 36,459 39,538 Business applications software 19,185 17,933 Other 1,642 — Subtotal 160,012 156,766 Less: accumulated depreciation 83,428 80,778 Property and equipment, net $ 76,584 $ 75,988 As of January 2, 2021 and December 28, 2019, the net book value of capitalized internal-use software costs was $6.5 million and $6.8 million, respectively, which are included within business applications software. Depreciation expense for the years ended January 2, 2021, December 28, 2019 and December 29, 2018 was $31.9 million, $24.4 million, and $17.0 million, respectively, which included amortization expense of $2.1 million, $1.5 million and $1.2 million, respectively, for capitalized internal-use software.

Goodwill and other intangible a

Goodwill and other intangible assets	12 Months Ended
	Jan. 02, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and other intangible assets	6. Goodwill and other intangible assets The following table summarizes the activity in the carrying amount of goodwill and intangible assets for fiscal years 2020 and 2019 (in thousands): Balance as of December 29, 2018 $ 118,896 Acquisition 2,050 Effect of foreign currency translation (2,214) Balance as of December 28, 2019 118,732 Effect of foreign currency translation 7,140 Balance as of January 2, 2021 $ 125,872 Intangible assets consisted of the following (in thousands): January 2, 2021 December 28, 2019 Cost Accumulated Net Cost Accumulated Net Completed technology $ 28,100 $ 26,525 $ 1,575 $ 28,100 $ 24,605 $ 3,495 Tradename 100 100 — 100 100 — Customer relationships 11,728 3,401 8,327 11,095 2,302 8,793 Reacquired distribution rights 34,318 34,318 — 31,680 31,680 — Non-competition agreements 280 280 — 256 192 64 Total $ 74,526 $ 64,624 $ 9,902 $ 71,231 $ 58,879 $ 12,352 Amortization expense related to acquired intangible assets was $2.9 million, $12.8 million and $19.6 million for the fiscal years ended January 2, 2021, December 28, 2019 and December 29, 2018, respectively. The estimated future amortization expense related to current intangible assets in each of the five succeeding fiscal years is expected to be as follows (in thousands): Cost of Revenue Operating Expenses Total 2021 $ 900 $ 823 $ 1,723 2022 675 823 1,498 2023 — 823 823 2024 — 823 823 2025 — 823 823 Thereafter — 4,212 4,212 Total $ 1,575 $ 8,327 $ 9,902

Accrued Expenses

Accrued Expenses	12 Months Ended
	Jan. 02, 2021
Accrued Liabilities, Current [Abstract]
Accrued Expenses	7. Accrued Expenses Accrued expenses consist of the following (in thousands): January 2, December 28, Accrued bonus $ 31,523 $ 12,541 Accrued warranty 24,392 13,856 Accrued manufacturing and logistics cost 20,093 14,383 Accrued compensation and benefits 17,635 13,331 Accrued sales and other indirect taxes payable 15,480 12,440 Current portion of operating lease liabilities 6,315 6,843 Accrued income taxes 3,806 3,378 Accrued other 12,144 4,996 $ 131,388 $ 81,768

Working Capital Facilities

Working Capital Facilities	12 Months Ended
	Jan. 02, 2021
Debt Disclosure [Abstract]
Revolving Line of Credit	8. Working Capital Facility Credit Facility In June 2018, the Company entered into a new agreement with Bank of America, N.A., increasing the amount of the unsecured revolving line of credit from $75.0 million to $150.0 million and extending the term of the credit facility to June 2023. As of January 2, 2021, the Company had no outstanding borrowings under the revolving credit facility. The revolving line of credit is available to fund working capital and other corporate purposes. The interest on loans under the credit facility accrues, at the Company's election, at either (1) LIBOR plus a margin, currently equal to 1.0%, based on the Company's ratio of indebtedness to Adjusted EBITDA (the "Eurodollar Rate"), or (2) the lender’s base rate. The lender’s base rate is equal to the highest of (1) the federal funds rate plus 0.5%, (2) the lender’s prime rate and (3) the Eurodollar Rate plus 1.0%. In the event that LIBOR is discontinued as expected in 2021, the Company expects the interest rates for its debt following such event will be based on either alternate base rates or agreed upon replacement rates. While the Company does not expect a LIBOR discontinuation would affect its ability to borrow or maintain already outstanding borrowings, it could result in higher interest rates. The credit facility contains customary terms and conditions for credit facilities of this type, including restrictions on the Company's ability to incur or guarantee additional indebtedness, create liens, enter into transactions with affiliates, make loans or investments, sell assets, pay dividends or make distributions on, or repurchase, its stock, and consolidate or merge with other entities. In addition, the Company is required to meet certain financial covenants customary with this type of agreement, including maintaining a maximum ratio of indebtedness to Adjusted EBITDA and a minimum specified interest coverage ratio. The credit facility contains customary events of default, including for payment defaults, breaches of representations, breaches of affirmative or negative covenants, cross defaults to other material indebtedness, bankruptcy and failure to discharge certain judgments. If a default occurs and is not cured within any applicable cure period or is not waived, the Company's obligations under the credit facility may be accelerated. As of January 2, 2021, the Company was in compliance with all covenants under the revolving credit facility. Lines of Credit The Company has an unsecured letter of credit facility with Bank of America, N.A., available to fund letters of credit up to an aggregate outstanding amount of $5.0 million. As of January 2, 2021, the Company had letters of credit outstanding of $0.7 million under the letter of credit facility and other lines of credit with Bank of America, N.A.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Jan. 02, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurements	10. Fair Value Measurements The Company’s financial assets and liabilities measured at fair value on a recurring basis were as follows (in thousands): Fair Value Measurements as of January 2, 2021 Level 1 Level 2 (1) Level 3 Assets: Money market funds $ 47,529 $ — $ — Marketable equity securities, $46,578 at cost (2) 47,576 — — Corporate bonds, $3,498 at cost (3) — 3,505 — Derivative instruments (Note 9) — 5,206 — Total assets measured at fair value $ 95,105 $ 8,711 $ — Liabilities: Derivative instruments (Note 9) $ — $ 12,822 $ — Total liabilities measured at fair value $ — $ 12,822 $ — The Company’s financial assets and liabilities measured at fair value on a recurring basis were as follows (in thousands): Fair Value Measurements as of December 28, 2019 Level 1 Level 2 (1) Level 3 Assets: Corporate and government bonds, $17,016 at cost $ — $ 17,032 $ — Derivative instruments (Note 9) — 15,314 — Total assets measured at fair value $ — $ 32,346 $ — Liabilities: Derivative instruments (Note 9) $ — $ 758 $ — Total liabilities measured at fair value $ — $ 758 $ — (1) Level 2 fair value estimates are based on observable inputs other than quoted prices in active markets for identical assets and liabilities, quoted prices for identical or similar assets or liabilities in inactive markets, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. (2) The related unrealized gain recorded in Other income, net was $1.0 million for the fiscal year ended January 2, 2021. Marketable equity securities are included in short term investments on the consolidated balance sheet. (3) As of January 2, 2021, the Company’s investment had a maturity date of March 2021.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Jan. 02, 2021
Equity [Abstract]
Stockholders' Equity	11. Stockholders' Equity Preferred Stock The Company has authorized 5,000,000 shares of undesignated preferred stock with a par value of $0.01 per share. None of the preferred shares were issued and outstanding at January 2, 2021 and December 28, 2019. Common Stock Common stockholders are entitled to one vote for each share held and to receive dividends if and when declared by the Company's board of directors and subject to and qualified by the rights of holders of the preferred stock. Upon dissolution or liquidation of the Company, holders of common stock will be entitled to receive all available assets subject to any preferential rights of any then outstanding preferred stock. Share Repurchase Activity The Company's Board of Directors approved a stock repurchase program authorizing up to $200.0 million in share repurchases from time to time until September 2021. On March 10, 2020, the Company entered into a Rule 10b5-1 plan to repurchase $25.0 million of common stock in the aggregate beginning March 13, 2020 and ending April 30, 2020. The Company repurchased 663,602 shares of its common stock at an average price of $37.65, totaling $25.0 million in March 2020.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Jan. 02, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	13. Commitments and Contingencies Legal Proceedings From time to time and in the ordinary course of business, the Company is subject to various claims, charges and litigation. The outcome of litigation cannot be predicted with certainty and some lawsuits, claims or proceedings may be disposed of unfavorably to us, which could materially affect our financial condition or results of operations. For the following litigation matters, a liability is not probable or the amount cannot be reasonably estimated and therefore accruals have not been made. On October 24, 2019, purported Company shareholder Miramar Firefighters’ Pension Fund filed a putative class action in the U.S. District Court for the Southern District of New York against the Company and certain of its directors and officers, captioned Miramar Firefighters’ Pension Fund v. iRobot Corporation, et al., No. 1:19-cv-09837. The case has been transferred to the U.S. District Court for the District of Massachusetts. A similar case captioned Campbell v. iRobot Corporation, et al., No. 1:19-cv-12483 was also filed in the U.S. District Court for the Southern District of New York and subsequently transferred to the U.S. District Court for the District of Massachusetts. On January 24, 2020, the Court consolidated the Miramar and Campbell cases (the consolidated cases together, the "Securities Class Action") and appointed a lead plaintiff and lead plaintiff's Counsel. On April 3, 2020, the plaintiff filed an amended complaint alleging violations of Sections 10(b) and 20(a) of the Securities Exchange Act of 1934 and Rule 10b-5 thereunder based on allegedly false and misleading statements and omissions concerning the impact of competition and Section 301 tariffs on the Company’s financial performance, and the Company has filed a motion to dismiss the case. A hearing was held on the Company’s motion to dismiss on September 17, 2020, and the Company is currently awaiting a ruling on its motion to dismiss. On December 20, 2019, purported Company shareholders David Katz and Thomas Wightman, derivatively on behalf of iRobot Corporation, filed a complaint in the U.S. District Court for Southern District of New York against the Company and certain of its directors and officers, captioned David Katz and Thomas Wightman, on behalf of iRobot Corporation v. iRobot Corporation, et al., No. 1:19-cv-11692. The complaint alleges breaches of fiduciary duties, unjust enrichment, violations of Sections 10(b) and 20(a) of the Exchange Act and Rule 10b-5 thereunder based on allegedly false and misleading statements and omissions concerning the Company's acquisitions of Sales on Demand Corporation and Robopolis SAS and the Company's subsequent financial performance. The complaint seeks, among other things, unspecified compensatory damages, including interest, in connection with the Company's allegedly inflated stock price, attorneys' fees and costs, and unspecified equitable/injunctive relief. This case has been transferred to the U.S. District Court for the District of Massachusetts. Similarly, additional derivative litigations -- namely: Robert Truman, on behalf of iRobot Corporation v. iRobot Corporation, et al., No. 1:20-cv-10034; Alexa Ruhfass, on behalf of iRobot Corporation v. iRobot Corporation, et al., No. 1:20-cv-10133; and William Tasco, derivatively on behalf of iRobot Corporation v. iRobot Corporation, et al., No. 1:20-cv-10253 - were filed in the U.S. District Court for the District of Massachusetts. All of these cases have been consolidated in a case captioned as In re iRobot Corporation Derivative litigation, No. 1:20-cv-10034, and have been stayed pending a ruling on the motion to dismiss in the Securities Class Action. Outstanding Purchase Orders At January 2, 2021, we had outstanding purchase orders aggregating approximately $341.9 million. The purchase orders, the majority of which are with our contract manufacturers for the purchase of inventory in the normal course of business, are for manufacturing and non-manufacturing related goods and services, and are generally cancellable without penalty. In circumstances where we determine that we have financial exposure associated with any of these commitments, we record a liability in the period in which that exposure is identified. Guarantees and Indemnification Obligations The Company enters into standard indemnification agreements in the ordinary course of business. Pursuant to these agreements, the Company indemnifies and agrees to reimburse the indemnified party for losses incurred by the indemnified party, generally the Company’s customers, in connection with any patent, copyright, trade secret or other proprietary right infringement claim by any third party. The term of these indemnification agreements is generally perpetual any time after execution of the agreement. The maximum potential amount of future payments the Company could be required to make under these indemnification agreements is unlimited. The Company has never incurred costs to defend lawsuits or settle claims related to these indemnification agreements. As a result, the Company believes the estimated fair value of these agreements is minimal. Accordingly, the Company has no liabilities recorded for these agreements as of January 2, 2021 and December 28, 2019, respectively. Warranty The Company provides warranties on most products and has established a reserve for warranty obligations based on estimated warranty costs. The reserve is included as part of accrued expenses (Note 7) in the accompanying consolidated balance sheets. Activity related to the warranty accrual was as follows (in thousands): Fiscal Year Ended January 2, December 28, December 29, Balance at beginning of period $ 13,856 $ 11,964 $ 11,264 Provision 28,884 14,091 10,798 Warranty usage (18,348) (12,199) (10,098) Balance at end of period $ 24,392 $ 13,856 $ 11,964

Employee Benefits (Notes)

Employee Benefits (Notes)	12 Months Ended
	Jan. 02, 2021
Retirement Benefits [Abstract]
Employee Benefits	14. Employee Benefits The Company sponsors a retirement plan under Section 401(k) of the Internal Revenue Code (the "Retirement Plan"). Eligible US employees may make tax-deferred contributions, and the Company, at its sole discretion, and subject to the limits prescribed by the IRS, may make either a nonelective contribution on behalf of all eligible employees or a matching contribution on behalf of all plan participants. The Company elected to make a matching contribution of approximately $3.0 million, $2.9 million and $2.8 million for the plan years ended January 2, 2021, December 28, 2019 and December 29, 2018, respectively. The employer contribution represents a matching contribution at a rate of 50% of each employee’s first six percent contribution. Accordingly, each employee participating is entitled up to a maximum of three percent of his or her eligible annual payroll.

Income Taxes

Income Taxes	12 Months Ended
	Jan. 02, 2021
Income Tax Disclosure [Abstract]
Income Taxes	15. Income Taxes Income (loss) before provision for income taxes was as follows (in thousands): Fiscal Year Ended January 2, December 28, December 29, Domestic $ 166,973 $ 84,225 $ 113,078 Foreign 20,942 14,608 (4,456) Income before income taxes $ 187,915 $ 98,833 $ 108,622 The components of income tax expense were as follows (in thousands): Fiscal Year Ended January 2, December 28, December 29, Current Federal $ 13,593 $ 13,366 $ 17,627 State 2,724 5,004 3,676 Foreign 10,451 6,941 10,732 Total current income tax provision $ 26,768 $ 25,311 $ 32,035 Deferred Federal $ 14,695 $ (9,345) $ (2,475) State 2,552 (1,783) (1,149) Foreign (3,168) (650) (7,781) Total deferred income tax provision 14,079 (11,778) (11,405) Total income tax provision $ 40,847 $ 13,533 $ 20,630 On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act ("CARES Act") was enacted in response to the COVID-19 pandemic. The CARES Act contains several income and payroll tax provisions, such as the deduction and deferral of employer portion of certain payroll taxes, repeal of the 80% limitation with respect to net operating losses arising in taxable years 2018, 2019, and 2020, and additional depreciation deductions related to qualified improvement property. The Company has concluded that the current provisions of the CARES Act, enacted to date, did not have a material impact on the Company's financial results during fiscal 2020. The reconciliation of statutory federal income tax to actual tax expense is as follows (in thousands): Fiscal Year Ended January 2, December 28, December 29, Statutory federal income tax $ 39,462 $ 20,755 $ 22,812 State taxes (net of federal benefit) 4,834 3,999 4,312 Federal and state credits (6,702) (8,152) (5,638) Excess tax expense (benefits) relating to stock-based compensation 313 (6,468) (6,529) Tax Cuts and Jobs Act of 2017 — — 2,127 Foreign-derived intangible income deduction (3,360) (4,180) (2,678) EMEA business restructuring — — 2,292 Executive compensation 718 2,081 745 Tax impact of foreign earnings 1,458 1,986 1,336 Change in valuation allowance 3,817 2,678 348 Other 307 834 1,503 $ 40,847 $ 13,533 $ 20,630 The components of net deferred tax assets were as follows (in thousands): January 2, December 28, Deferred tax assets Revenue reserves $ 20,564 $ 21,355 Accruals and other liabilities 14,357 8,225 Operating lease liabilities 12,429 14,117 Tax credits and net operating loss carryforwards 12,748 8,814 Stock-based compensation 4,868 4,981 Other 3,793 5,068 Gross deferred tax assets 68,759 62,560 Valuation allowance (7,643) (3,826) Total deferred tax assets 61,116 58,734 Deferred tax liabilities Intangible assets 3,341 3,838 Operating lease right-of-use assets 11,443 13,249 Marketable equity securities 10,676 — Other 2,957 768 Total deferred tax liabilities 28,417 17,855 Net deferred tax assets $ 32,699 $ 40,879 The Company intends to continue to invest all of its unremitted foreign earnings, as well as the capital in its foreign subsidiaries, indefinitely outside of the U.S. At January 2, 2021, the Company has unremitted foreign earnings and any unrecognized deferred tax liability on these unremitted earnings would be immaterial. The Company has federal net operating loss carryforwards of $1.7 million as of January 2, 2021. The Company has foreign net operating loss carryforwards of $3.5 million as of January 2, 2021 that have no expiration period. The Company has state research and development credit carryforwards of $16.3 million and $13.1 million as of January 2, 2021 and December 28, 2019, respectively, which expire from 2028 to 2036. Under the Internal Revenue Code and state law, certain substantial changes in the Company’s ownership could result in an annual limitation on the amount of these tax carryforwards which can be utilized in future years. As of January 2, 2021, December 28, 2019 and December 29, 2018, the Company had a valuation allowance of $7.6 million, $3.8 million and $1.1 million, respectively, for state research and development credit carryforwards and certain foreign deferred tax assets for which the Company believes do not meet the "more likely than not" criteria for recognition. A summary of the Company’s adjustments to its gross unrecognized tax benefits in the current year is as follows (in thousands): Fiscal Year Ended January 2, 2021 December 28, December 29, Balance at beginning of period $ 7,121 $ 7,119 $ 4,590 Increase for tax positions related to the current year 765 770 2,891 Increase for tax positions related to acquisition — — 1,493 Increase (decrease) for tax positions related to prior years 1,231 (768) 407 Decrease for settlements with applicable taxing authorities — — (2,262) Decrease for lapses of statute of limitations (558) — — Balance at end of period $ 8,559 $ 7,121 $ 7,119 The Company accrues interest and, if applicable, penalties for any uncertain tax positions as a component of income tax expense. As of January 2, 2021, December 28, 2019 and December 29, 2018 there were no material accrued interest or penalties. The Company does not expect a significant change in the amount of unrecognized tax benefits within the next 12 months. If all of the Company's unrecognized tax benefits as of January 2, 2021 were to become recognizable in the future, it would record a $9.5 million benefit, inclusive of interest, to the income tax provision.

Industry Segment, Geographic In

Industry Segment, Geographic Information and Significant Customers	12 Months Ended
	Jan. 02, 2021
Segment Reporting [Abstract]
Industry Segment, Geographic Information and Significant Customers	The Company operates as one operating segment. The Company's consumer robots are offered to consumers through a variety of distribution channels, including chain stores and other national retailers, through the Company's own website and app, dedicated e-commerce websites, the online arms of traditional retailers, and through value-added distributors and resellers worldwide. Geographic Information For the fiscal years ended January 2, 2021, December 28, 2019 and December 29, 2018, sales to non-U.S. customers accounted for 47.9%, 50.3% and 48.7% of total revenue, respectively. The following table provides information about revenue by geographical region (in thousands): January 2, 2021 December 28, 2019 December 29, 2018 Domestic $ 744,648 $ 603,618 $ 560,995 International 685,742 610,392 531,589 Total $ 1,430,390 $ 1,214,010 $ 1,092,584 Significant Customers

Quarterly Information (Unaudite

Quarterly Information (Unaudited)	12 Months Ended
	Jan. 02, 2021
Quarterly Financial Information Disclosure [Abstract]
Quarterly Information (Unaudited)	17. Quarterly Information (Unaudited) The following information has been derived from unaudited consolidated financial statements that, in the opinion of management, include all recurring adjustments necessary for a fair statement of such information (in thousands, except per share amounts): Fiscal Quarter Ended January 2, September 26, June 27, March 28, December 28, September 28, June 29, March 30, Revenue $ 544,827 $ 413,145 $ 279,883 $ 192,535 $ 426,778 $ 289,399 $ 260,172 $ 237,661 Gross profit 215,421 198,841 178,012 77,955 169,370 136,841 118,170 119,546 Net income (loss) 13,335 93,252 58,616 (18,135) 20,041 35,532 7,207 22,520 Diluted income (loss) per share $ 0.46 $ 3.27 $ 2.07 $ (0.64) $ 0.70 $ 1.24 $ 0.25 $ 0.78

Summary of Significant Accounti

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Jan. 02, 2021
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation and Foreign Currency Translation The accompanying consolidated financial statements include those of iRobot and its subsidiaries, after elimination of all intercompany balances and transactions. iRobot has prepared the accompanying consolidated financial statements in conformity with accounting principles generally accepted in the United States of America ("GAAP"). For the Company's subsidiaries that transact in a functional currency other than the U.S. dollar, assets and liabilities are translated into U.S. dollars at period-end foreign exchange rates. Revenues and expenses are translated into U.S. dollars at the average foreign exchange rates for the period. Translation adjustments are excluded from the determination of net income and are recorded in accumulated other comprehensive income (loss), a separate component of stockholders' equity.
Fiscal Year-End	The Company operates and reports using a 52-53 week fiscal year ending on the Saturday closest to December 31. Accordingly, the Company’s fiscal quarters end on the Saturday that falls closest to the last day of the third month of each quarter. The fiscal year ended January 2, 2021 ("fiscal 2020") was a 53-week fiscal year. The fiscal years ended December 28, 2019 ("fiscal 2019") and December 29, 2018 ("fiscal 2018") were 52-week fiscal years.
Use of Estimates	Use of Estimates The preparation of these financial statements in conformity with GAAP requires the Company to make estimates and assumptions that affect the reported amounts of assets and liabilities and revenue and expenses. These estimates and judgments, include but are not limited to, revenue recognition, including performance obligations, variable consideration and other obligations such as product returns and incentives; allowance for credit losses; product warranties; valuation of goodwill and acquired intangible assets; valuation of non-marketable equity investments; evaluating loss contingencies; accounting for stock-based compensation including performance-based assessments; and accounting for income taxes and related valuation allowances. The Company bases these estimates and judgments on historical experience, market participant fair value considerations, projected future cash flows and various other factors that the Company believes are reasonable under the circumstances. Actual results may differ from the Company’s estimates.
Cash and Cash Equivalents	Cash and Cash Equivalents The Company considers all highly liquid investments with maturity of three months or less at the time of purchase to be cash and cash equivalents. The Company invests its excess cash primarily in money market funds or demand deposit accounts of major financial institutions. Accordingly, its cash and cash equivalents are subject to minimal credit and market risk. At January 2, 2021 and December 28, 2019, cash and cash equivalents totaled $432.6 million and $239.4 million, respectively. These cash and cash equivalents are carried at cost, which approximates fair value.
Short Term Investments	Short Term Investments The Company's short term investments include debt securities and marketable equity securities with readily determinable fair value. The Company’s investments in debt securities are classified as available-for-sale and are recorded at fair value with any unrealized gain or loss recorded as an element of stockholders’ equity. The change in fair value of the Company's investments in marketable equity securities is recognized as unrealized gains and losses in other income, net at the end of each reporting period. The fair value of investments is determined based on quoted market prices at the reporting date for those instruments. Investments consisted of the following (in thousands): January 2, December 28, Cost Fair Cost Fair Corporate and government bonds $ 3,498 $ 3,505 $ 17,016 $ 17,032 Marketable equity securities 46,578 47,576 — — Total short term investments $ 50,076 $ 51,081 $ 17,016 $ 17,032 As of January 2, 2021, the Company’s bond investment had a maturity date of March 2021. The Company invests primarily in investment grade securities and limits the amount of investment in any single issuer.
Credit Losses	Credit LossesThe Company is exposed to credit losses primarily through sales of its products. The Company assesses each customer's ability to pay by conducting a credit review which includes consideration of established credit ratings or an internal assessment of the customer's creditworthiness based on an analysis of their financial information when a credit rating is not available. The Company monitors the credit exposure through active review of customer balances. The Company's expected loss methodology for accounts receivable is developed through consideration of factors including, but not limited to, historical collection experience, current customer credit ratings, current and future economic and market conditions and age of the receivable. Although the Company historically has not experienced significant credit losses as it relates to trade accounts receivable, the COVID-19 pandemic has caused uncertainty in some customer accounts.
Accounts receivable allowances	Accounts receivable allowances Allowance for product returns : The Company records an allowance for product returns based on specific terms and conditions included in the customer agreements or based on historical experience and the Company's expectation of future returns. Allowance for other credits and incentives: The Company records an allowance related to customer incentives such as discounts, promotions, price protection and other support programs. The allowance is based on specific terms and conditions included in customer agreements, specific programs and historical experience.
Inventory	Inventory Inventory is stated at the lower of cost or net realizable value with cost being determined using the first-in, first-out method. The Company writes down its inventory for estimated obsolescence or excess inventory based upon assumptions around market conditions and estimates of future demand. Adjustments to reduce inventory to net realizable value are recognized in cost of revenue and have not been significant for the periods presented. Inventory primarily consists of finished goods at January 2, 2021 and December 28, 2019.
Warranty	Warranty The Company generally provides a one-year warranty on all of its products except in countries where a two-year warranty is required against defects in materials and workmanship. The Company's standard warranty provides for repair or replacement of the associated products during the warranty period. The Company records estimated warranty costs in the period the related revenue is recognized based on historical experience, expectations of future costs to repair or replace and knowledge of specific product failures outside the Company's historical experience. Actual results could differ from these estimates, which could cause increases or decreases to the warranty reserves in future periods.
Property and Equipment	Property and Equipment Property and equipment are recorded at cost and depreciated using the straight-line method over the estimated useful lives as follows: Estimated Useful Life Computer and equipment 2-5 years Furniture and fixtures 5 Machinery and tooling 2-5 Business applications software 3-7 Leasehold improvements Lesser of economic benefit period or term of lease Expenditures for additions and betterments of property and equipment are capitalized. Expenditures for repairs and maintenance are charged to expense as incurred. As assets are retired or sold, the related cost and accumulated depreciation are removed from the accounts and any resulting gain or loss is recognized.
Goodwill and Other Long-Lived Assets	Goodwill and Other Long-Lived Assets Goodwill represents the excess of the purchase price in a business combination over the fair value of the net tangible and intangible assets acquired. Goodwill is not amortized but rather is assessed for impairment at the reporting unit level annually during the fourth quarter of each fiscal year or more frequently if the Company believes indicators of impairment exist. Goodwill impairment, if any, is determined by comparing the reporting unit's fair value to its carrying value. An impairment loss is recognized in an amount equal to the excess of the reporting unit's carrying value over its fair value, up to the amount of goodwill allocated to the reporting unit. Other long-lived assets primarily consist of property and equipment, operating lease right-of-use assets and intangible assets. The Company periodically evaluates the recoverability of other long-lived assets whenever events and changes in circumstances, such as reductions in demand or significant economic slowdowns in the industry, indicate that the carrying amount of an asset may not be fully recoverable. When indicators of impairment are present, the carrying values of the asset group are evaluated in relation to the future undiscounted cash flows of the underlying business. The net book value of the underlying asset is adjusted to fair value if the sum of the expected discounted cash flows is less than book value. Fair values are based on estimates of market prices and assumptions concerning the amount and timing of estimated future cash flows and assumed discount rates, reflecting varying degrees of perceived risk. The impairment assessment of goodwill and other long-lived assets involves significant estimates and assumptions, which may be unpredictable and inherently uncertain. These estimates and assumptions include identification of reporting units and asset groups, long-term growth rates, profitability, estimated useful lives, comparable market multiples, and discount rates. Any changes in these assumptions could impact the result of the impairment assessment. There was no impairment of goodwill or other long-lived assets during fiscal 2020, 2019 and 2018.
Other Assets	Strategic Investments The Company holds non-marketable equity securities as part of its strategic investments portfolio. The Company classifies the majority of these securities as equity securities without readily determinable fair values and measures these investments at cost, less any impairment, adjusted for observable price changes. These investments are valued using significant unobservable inputs or data in an inactive market and the valuation requires the Company's judgment due to the absence of market prices and inherent lack of liquidity. The estimated fair value is based on quantitative and qualitative factors including, but not limited to, subsequent financing activities by the investee and projected discounted cash flows. At January 2, 2021 and December 28, 2019, the Company's equity securities without readily determinable fair values totaled $17.4 million and $21.0 million, respectively, and are included in other assets on the consolidated balance sheets. On July 1, 2020, Teladoc Health, Inc. ("Teladoc") closed on its previously announced acquisition of InTouch Health, of which the Company held non-marketable equity securities. In exchange for its shares of InTouch Health, the Company received 0.2 million shares of Teladoc and recorded a gain of $38.6 million to other income, net during the fiscal year ended January 2, 2021. The Teladoc shares received are subject to time based contractual sales restrictions which expire in January 2021. These shares are accounted for as marketable equity securities and measured at fair value with unrealized gains and losses recognized in other income, net at the end of each reporting period. As a result, the Company entered into an economic hedge in July 2020 to reduce the Company's exposure to stock price fluctuations during the restricted period. During the fiscal year ended January 2, 2021, the Company recorded a net gain of $4.9 million from the remeasurements of Teladoc shares and related hedge. As of January 2, 2021, the shares in Teladoc were valued at $47.6 million and are recorded in short term investments on the consolidated balance sheet. Subsequent to fiscal 2020, the Company received net proceeds of $51.5 million related to the sale of Teledoc shares and settlement of the related hedge during January 2021.
Financial Instruments and Hedging Activities	Financial Instruments and Hedging Activities The Company utilizes derivative instruments to partially offset its financial risks to foreign exchange risk. The Company does not engage in speculative hedging activity. In order to account for a derivative instrument as a cash flow hedge, specific criteria must be met, including: (i) ensuring at the inception of the hedge that formal documentation exists for both the hedging relationship and the entity’s risk management objective and strategy for undertaking the hedge and (ii) at the inception of the hedge and on an ongoing basis, the hedging relationship is expected to be highly effective in achieving offsetting changes in fair value attributed to the hedged risk during the period that the hedge is designated. Cash flow hedge amounts that are included in the assessment of hedge effectiveness are deferred in accumulated other comprehensive income (loss) until the hedged item is recognized in earnings. Deferred gains and losses associated with cash flow hedges are recognized as a component of net sales in the same period as the related revenue is recognized. Absent meeting these criteria, changes in fair value are recognized in other income, net, in the consolidated statements of income. The Company may also enter into non-designated foreign currency contracts to offset a portion of the foreign currency exchange gains and losses generated by the remeasurement of certain assets and liabilities denominated in non-functional currencies. Changes in fair value are recognized in other income, net, in the consolidated statements of income.
Fair Value Measurements	Fair Value Measurements The Company accounts for certain assets and liabilities at fair value. The fair value is established based on a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value. These tiers include: • Level 1 - observable inputs such as quoted prices for identical instruments in active markets; • Level 2 - inputs other than quoted prices in active markets that are either directly or indirectly observable; and • Level 3 - unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions.
Stock-Based Compensation	Stock-Based Compensation The Company accounts for stock-based compensation through recognition of the fair value of the stock-based compensation as a charge against earnings. The fair value for time-based restricted stock units and performance-based restricted stock units is based on the closing share price of the Company's common stock on the date of grant. For performance-based restricted stock units, the compensation cost is recognized based on the number of units expected to vest upon the achievement of the performance conditions. The Company recognizes stock-based compensation as an expense on a straight-line basis, over the requisite service period. The Company accounts for forfeitures as they occur, rather than applying an estimated forfeiture rate.
Business Combinations
Research and Development	Research and Development Costs incurred in the research and development of the Company’s products are expensed as incurred.
Advertising Expense	Advertising ExpenseThe Company expenses advertising costs as they are incurred. During the years ended January 2, 2021, December 28, 2019 and December 29, 2018 advertising expense totaled $145.2 million, $125.0 million and $114.0 million, respectively, and are recorded within the selling and marketing expenses in its consolidated statements of income.
Income Taxes	Income TaxesDeferred tax assets and liabilities are determined based on the difference between the financial statement and tax basis using enacted tax rates in effect in the years in which those temporary differences are expected to be recovered or settled in each jurisdiction. A valuation allowance is provided if, based upon the weight of available evidence, it is more likely than not that the related benefits will not be realized. The Company regularly reviews the deferred tax assets for recoverability considering historical profitability, projected future taxable income, future reversals of existing taxable temporary differences, as well as feasible tax planning strategies in each jurisdiction.
Concentration of Credit Risk and Significant Customers	Concentration of Credit Risk and Significant Customers Financial instruments which potentially expose the Company to concentrations of credit risk consist of accounts receivable and cash and cash equivalents. Management believes its credit policies are prudent and reflect normal industry terms and business risk. At January 2, 2021, one customer accounted for 17.6% of the Company's accounts receivable balance. At December 28, 2019, two customers accounted for a total of 26.6% of the Company's accounts receivable balance. For the fiscal years ended January 2, 2021, December 28, 2019, and December 29, 2018, there was one customer that accounted for 10% or more of total revenue, representing 22.7%, 21.3% and 17.3%, of the Company's total revenue, respectively. The Company maintains its cash in bank deposit accounts and money market funds at high quality financial institutions. The individual balances, at times, may exceed federally insured limits. These deposits may be redeemed upon demand, and management believes that the financial institutions that hold the Company’s cash and cash equivalents are financially sound and, accordingly, minimal credit risk exists with respect to cash and cash equivalents.
Net Income Per Share	Net Income Per ShareBasic income per share is calculated using the Company's weighted-average outstanding common shares. Diluted income per share is calculated using the Company's weighted-average outstanding common shares including the dilutive effect of stock awards as determined under the treasury stock method.
Recent Accounting Pronouncements	Recently Adopted Accounting Standards In June 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2016-13, "Measurement of Credit Losses on Financial Instruments," which amends the impairment model by requiring entities to use a forward-looking approach based on expected losses rather than incurred losses to estimate credit losses on certain types of financial instruments. The Company adopted the standard effective December 29, 2019 which resulted in no adjustment to the allowance for credit losses upon adoption. See the description of the Company’s "Credit Losses" accounting policy above. In August 2018, the FASB issued ASU No. 2018-13, "Fair Value Measurement: Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement." The amendment modifies disclosure requirements related to fair value measurement. The Company adopted this standard effective December 29, 2019 which did not have a material impact on the Company's consolidated financial statements and related disclosures. In August 2018, the FASB issued ASU No. 2018-15, "Intangibles - Goodwill and Other - Internal-Use Software." The new standard aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal use software license). The Company adopted the standard using the prospective method effective December 29, 2019 which did not have a material impact on the Company's consolidated financial statements. Recently Issued Accounting Standards In December 2019, the FASB issued ASU No. 2019-12, "Income Taxes - Simplifying the Accounting for Income Taxes." The ASU simplifies the accounting for income taxes by removing certain exceptions to the general principles as well as clarifying and amending existing guidance to improve consistent application. The amendments to this ASU are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020, with early adoption permitted. Depending on the amendment, adoption may be applied on the retrospective, modified retrospective or prospective basis. The Company will adopt the ASU effective January 3, 2021, and has concluded that there is no impact to the consolidated financial statements upon adoption.
Revenue Recognition	The Company primarily derives its revenue from the sale of consumer robots and accessories. The Company sells products directly to consumers through online stores and indirectly through resellers and distributors. Revenue is recognized upon transfer of control of promised products or services to customers, generally as title and risk of loss pass, in an amount that reflects the consideration the Company expects to receive in exchange for those products or services. Revenue is recognized only to the extent that it is probable that a significant reversal of revenue will not occur and when collection is considered probable. Taxes collected from customers, which are subsequently remitted to governmental authorities, are excluded from revenue. Shipping and handling expenses are considered fulfillment activities and are expensed as incurred. The Company's consumer robots are highly dependent on, and interrelated with, the embedded software and cannot function without the software. As such, the consumer robots are accounted for as a single performance obligation, and the revenue is recognized at a point in time when the control is transferred to distributors, resellers or directly to end customers through online stores. For certain consumer robots with Wi-Fi capability ("connected robots"), each sale represents an arrangement with multiple promises consisting of the robot, downloadable free app, cloud services and potential future unspecified software upgrades. The Company has determined that the app, cloud services and potential future unspecified software upgrades represent one promised service to the customer to enhance the functionality and interaction with the robot (referred to collectively as "Cloud Services"). For contracts that contain multiple performance obligations, the transaction price is allocated to each performance obligation based on a relative standalone selling price ("SSP"). The Company estimates SSP for items that are not sold separately, using market data if available or analysis of the cost of providing the products or services plus a reasonable margin. The transaction price allocated to the robots is recognized as revenue at a point in time when control is transferred and when collection is considered probable. The transaction price allocated to the Cloud Services is deferred and recognized on a straight-line basis over the estimated term of the Cloud Services. For contracts with a duration of greater than one year, the transaction price allocated to performance obligations that are unsatisfied as of January 2, 2021 and December 28, 2019 was $11.5 million and $4.0 million, respectively . The Company does not disclose the value of unsatisfied performance obligations for contracts with an original expected duration of one year or less. The Company’s products generally carry a one-year or two-year limited warranty that promises customers that delivered products are as specified. The Company does not consider these assurance-type warranties as a separate performance obligation and therefore, the Company accounts for such warranties under ASC 460, "Guarantees." During the fourth quarter of 2020, the Company began offering its customers the option to purchase an extended warranty for a fee. Amounts paid for the extended warranty plans are deferred and recognized as revenue on a straight-line basis over the service period.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Jan. 02, 2021
Accounting Policies [Abstract]
Components of Short-term Investments	January 2, December 28, Cost Fair Cost Fair Corporate and government bonds $ 3,498 $ 3,505 $ 17,016 $ 17,032 Marketable equity securities 46,578 47,576 — — Total short term investments $ 50,076 $ 51,081 $ 17,016 $ 17,032
Activity related to accounts receivable allowances	Activity related to accounts receivable allowances was as follows (in thousands): Fiscal Year Ended January 2, December 28, December 29, Allowance for product returns Balance at beginning of period $ 55,191 $ 53,920 $ 42,693 Provision 68,028 69,488 67,391 Deduction (58,876) (68,217) (56,164) Balance at end of period $ 64,343 $ 55,191 $ 53,920 Allowance for other credits and incentives Balance at beginning of period $ 134,046 $ 97,737 $ 61,359 Adjustment related to adoption of ASC 606 — — 1,192 Provision 285,139 284,084 196,858 Deduction (277,012) (247,775) (161,672) Balance at end of period $ 142,173 $ 134,046 $ 97,737
Property and equipment	Property and equipment are recorded at cost and depreciated using the straight-line method over the estimated useful lives as follows: Estimated Useful Life Computer and equipment 2-5 years Furniture and fixtures 5 Machinery and tooling 2-5 Business applications software 3-7 Leasehold improvements Lesser of economic benefit period or term of lease Property and equipment consists of the following (in thousands): January 2, December 28, Computer and equipment $ 13,617 $ 13,588 Furniture and fixtures 8,394 6,494 Machinery and tooling 80,715 79,213 Leasehold improvements 36,459 39,538 Business applications software 19,185 17,933 Other 1,642 — Subtotal 160,012 156,766 Less: accumulated depreciation 83,428 80,778 Property and equipment, net $ 76,584 $ 75,988
Basic and diluted net income per share	The following table presents the calculation of both basic and diluted net income per share (in thousands, except per share amounts): Fiscal Year Ended January 2, December 28, December 29, Net income $ 147,068 $ 85,300 $ 87,992 Weighted-average shares outstanding 28,101 28,097 27,692 Dilutive effect of employee stock plans 517 638 948 Diluted weighted-average shares outstanding 28,618 28,735 28,640 Basic income per share $ 5.23 $ 3.04 $ 3.18 Diluted income per share $ 5.14 $ 2.97 $ 3.07

Revenue Recognition (Tables)

Revenue Recognition (Tables)	12 Months Ended
	Jan. 02, 2021
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue [Table Text Block]	Disaggregation of Revenue The following table provides information about disaggregated revenue by geographical region (in thousands): January 2, 2021 December 28, 2019 December 29, 2018 United States $ 744,648 $ 603,618 $ 560,995 EMEA 386,007 357,760 311,659 Japan 193,304 160,875 132,813 Other 106,431 91,757 87,117 Total revenue $ 1,430,390 $ 1,214,010 $ 1,092,584
Contract with Customer, Asset and Liability [Table Text Block]	Contract Balances The following table provides information about receivables and contract liabilities from contracts with customers (in thousands): January 2, 2021 December 28, 2019 Accounts receivable, net $ 170,526 $ 146,161 Contract liabilities 17,700 6,991 The Company invoices customers based upon contractual billing schedules, and accounts receivable are recorded when the right to consideration becomes unconditional. Contract liabilities include deferred revenue associated with the Cloud Services and extended warranty plans as well as prepayments received from customers in advance of product shipments. The change in the opening and closing balances of the Company’s contract assets and contract liabilities primarily results from the timing difference between the Company’s performance and the customer’s payment. During the years ended January 2, 2021 and December 28, 2019, the Company recogni zed $5.5 million

Leases (Tables)

Leases (Tables)	12 Months Ended
	Jan. 02, 2021
Leases [Abstract]
Lease, Cost [Table Text Block]	The components of lease expense were as follows (in thousands): January 2, 2021 December 28, 2019 Operating lease cost $ 9,363 $ 8,777 Variable lease cost 3,583 4,096 Total lease cost $ 12,946 $ 12,873
Schedule of Leases, Supplemental Cash Flow [Table Text Block]	Supplemental cash flow information related to leases was as follows (in thousands): January 2, 2021 December 28, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 9,862 $ 9,540 Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 2,310 $ 53,227
Lessee, Operating Lease, Liability, Maturity [Table Text Block]	Maturities of operating lease liabilities were as follows as of January 2, 2021 (in thousands): 2021 $ 8,226 2022 8,633 2023 7,647 2024 6,590 2025 6,612 Thereafter 28,539 Total minimum lease payments $ 66,247 Less: imputed interest 9,447 Present value of future minimum lease payments $ 56,800 Less: current portion of operating lease liabilities (Note 7) 6,315 Long-term lease liabilities $ 50,485

Property and Equipment (Tables)

Property and Equipment (Tables)	12 Months Ended
	Jan. 02, 2021
Property, Plant and Equipment [Abstract]
Property and equipment	Property and equipment are recorded at cost and depreciated using the straight-line method over the estimated useful lives as follows: Estimated Useful Life Computer and equipment 2-5 years Furniture and fixtures 5 Machinery and tooling 2-5 Business applications software 3-7 Leasehold improvements Lesser of economic benefit period or term of lease Property and equipment consists of the following (in thousands): January 2, December 28, Computer and equipment $ 13,617 $ 13,588 Furniture and fixtures 8,394 6,494 Machinery and tooling 80,715 79,213 Leasehold improvements 36,459 39,538 Business applications software 19,185 17,933 Other 1,642 — Subtotal 160,012 156,766 Less: accumulated depreciation 83,428 80,778 Property and equipment, net $ 76,584 $ 75,988

Goodwill and other intangible_2

Goodwill and other intangible assets (Tables)	12 Months Ended
	Jan. 02, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of goodwill	The following table summarizes the activity in the carrying amount of goodwill and intangible assets for fiscal years 2020 and 2019 (in thousands): Balance as of December 29, 2018 $ 118,896 Acquisition 2,050 Effect of foreign currency translation (2,214) Balance as of December 28, 2019 118,732 Effect of foreign currency translation 7,140 Balance as of January 2, 2021 $ 125,872
Other intangible assets	Intangible assets consisted of the following (in thousands): January 2, 2021 December 28, 2019 Cost Accumulated Net Cost Accumulated Net Completed technology $ 28,100 $ 26,525 $ 1,575 $ 28,100 $ 24,605 $ 3,495 Tradename 100 100 — 100 100 — Customer relationships 11,728 3,401 8,327 11,095 2,302 8,793 Reacquired distribution rights 34,318 34,318 — 31,680 31,680 — Non-competition agreements 280 280 — 256 192 64 Total $ 74,526 $ 64,624 $ 9,902 $ 71,231 $ 58,879 $ 12,352
Estimated future amortization expense related to current intangible assets	The estimated future amortization expense related to current intangible assets in each of the five succeeding fiscal years is expected to be as follows (in thousands): Cost of Revenue Operating Expenses Total 2021 $ 900 $ 823 $ 1,723 2022 675 823 1,498 2023 — 823 823 2024 — 823 823 2025 — 823 823 Thereafter — 4,212 4,212 Total $ 1,575 $ 8,327 $ 9,902

Accrued Expenses (Tables)

Accrued Expenses (Tables)	12 Months Ended
	Jan. 02, 2021
Accrued Liabilities, Current [Abstract]
Components of accrued expenses	Accrued expenses consist of the following (in thousands): January 2, December 28, Accrued bonus $ 31,523 $ 12,541 Accrued warranty 24,392 13,856 Accrued manufacturing and logistics cost 20,093 14,383 Accrued compensation and benefits 17,635 13,331 Accrued sales and other indirect taxes payable 15,480 12,440 Current portion of operating lease liabilities 6,315 6,843 Accrued income taxes 3,806 3,378 Accrued other 12,144 4,996 $ 131,388 $ 81,768

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities (Tables)	12 Months Ended
	Jan. 02, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of fair values of derivative instruments	The fair values of derivative instruments are as follows (in thousands): Fair Value Classification January 2, 2021 December 28, 2019 Derivatives not designated as hedging instruments: Foreign currency forward contracts Other current assets $ 261 $ 1,855 Foreign currency forward contracts Accrued expenses 2,176 297 Forward sale contract Other current assets 3,904 — Derivatives designated as cash flow hedges: Foreign currency forward contracts Other current assets $ 362 $ 4,347 Foreign currency forward contracts Other assets 679 9,112 Foreign currency forward contracts Accrued expenses 2,092 47 Foreign currency forward contracts Long-term liabilities 8,554 414
Schedule of derivative instruments gain (loss)	Gains (losses) associated with derivative instruments not designated as hedging instruments are as follows (in thousands): Fiscal year ended Classification January 2, 2021 December 28, 2019 Gain (loss) recognized in income Other income, net $ (188) $ 89 The following tables reflect the effect of derivatives designated as cash flow hedging for the years ended (in thousands): Gain (loss) recognized in OCI on Derivative (1) Fiscal year ended January 2, 2021 December 28, 2019 Foreign currency forward contracts $ (18,504) $ 16,483 (1) The amount represents the change in fair value of derivative contracts due to changes in spot rates. Gain (loss) recognized in earnings on cash flow hedging instruments January 2, 2021 December 28, 2019 Revenue Revenue Consolidated statements of income in which the effects of cash flow hedging instruments are recorded $ 1,430,390 $ 1,214,010 Gain or (loss) on cash flow hedging relationships: Foreign currency forward contracts: Amount of gain (loss) reclassified from AOCI into earnings $ 4,783 $ 1,889

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Jan. 02, 2021
Fair Value Disclosures [Abstract]
Schedule of financial assets and liabilities measured at fair value on a recurring basis	The Company’s financial assets and liabilities measured at fair value on a recurring basis were as follows (in thousands): Fair Value Measurements as of January 2, 2021 Level 1 Level 2 (1) Level 3 Assets: Money market funds $ 47,529 $ — $ — Marketable equity securities, $46,578 at cost (2) 47,576 — — Corporate bonds, $3,498 at cost (3) — 3,505 — Derivative instruments (Note 9) — 5,206 — Total assets measured at fair value $ 95,105 $ 8,711 $ — Liabilities: Derivative instruments (Note 9) $ — $ 12,822 $ — Total liabilities measured at fair value $ — $ 12,822 $ — The Company’s financial assets and liabilities measured at fair value on a recurring basis were as follows (in thousands): Fair Value Measurements as of December 28, 2019 Level 1 Level 2 (1) Level 3 Assets: Corporate and government bonds, $17,016 at cost $ — $ 17,032 $ — Derivative instruments (Note 9) — 15,314 — Total assets measured at fair value $ — $ 32,346 $ — Liabilities: Derivative instruments (Note 9) $ — $ 758 $ — Total liabilities measured at fair value $ — $ 758 $ — (1) Level 2 fair value estimates are based on observable inputs other than quoted prices in active markets for identical assets and liabilities, quoted prices for identical or similar assets or liabilities in inactive markets, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. (2) The related unrealized gain recorded in Other income, net was $1.0 million for the fiscal year ended January 2, 2021. Marketable equity securities are included in short term investments on the consolidated balance sheet. (3) As of January 2, 2021, the Company’s investment had a maturity date of March 2021.

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Jan. 02, 2021
Share-based Payment Arrangement [Abstract]
Share based compensation expense by classification	Stock-based compensation breaks down by expense classification as follows (in thousands): Fiscal Year Ended January 2, December 28, December 29, Cost of revenue $ 1,511 $ 1,486 $ 1,407 Research and development 10,655 9,186 7,494 Selling and marketing 3,700 3,323 2,842 General and administrative 14,109 9,749 14,061 Total $ 29,975 $ 23,744 $ 25,804
Summary of stock option plan activity	The following table summarizes stock option activity for fiscal years 2020, 2019 and 2018: Number of Weighted Average Weighted Average Aggregate Outstanding at December 30, 2017 712,954 $ 34.34 Granted — — Exercised (239,830) 33.40 Canceled (10,863) 46.20 Outstanding at December 29, 2018 462,261 34.55 Granted — — Exercised (127,024) 32.95 Canceled (12,329) 37.03 Outstanding at December 28, 2019 322,908 35.08 Granted — — Exercised (88,292) 31.40 Canceled (1,938) 45.89 Outstanding at January 2, 2021 232,678 $ 36.39 1.75 years $10.21 million Vested and expected to vest at January 2, 2021 232,678 $ 36.39 1.75 years $10.21 million Exercisable as of January 2, 2021 232,116 $ 36.34 1.75 years $10.20 million _________________________ (1) The aggregate intrinsic value on the table above represents the difference between the Company's closing stock price on January 2, 2021 of $80.29 and the exercise price of the underlying in-the-money option.
Activities relating to time based restricted stock units	The following table summarizes the time-based restricted stock unit activity for fiscal years 2020, 2019 and 2018: Number of Weighted Average Outstanding at December 30, 2017 938,453 $ 51.24 Granted 307,614 81.55 Vested (351,816) 47.30 Forfeited (38,362) 60.62 Outstanding at December 29, 2018 855,889 63.32 Granted 407,325 79.91 Vested (358,119) 54.89 Forfeited (85,863) 76.85 Outstanding at December 28, 2019 819,232 73.83 Granted 493,908 61.53 Vested (318,079) 67.95 Forfeited (101,028) 75.20 Outstanding at January 2, 2021 894,033 $ 68.97
Activities relating to performance based restricted stock units	The following table summarizes the performance-based restricted stock unit activity for fiscal years 2020, 2019 and 2018: Number of Weighted Average Outstanding at December 20, 2017 242,061 $ 43.97 Granted 91,538 68.41 Vested (56,259) 34.30 Forfeited (3,221) 45.71 Outstanding at December 29, 2018 274,119 54.10 Granted 70,827 122.20 Vested (78,943) 33.33 Forfeited (49,772) 78.29 Outstanding at December 28, 2019 216,231 78.42 Granted 130,284 46.77 Vested (71,734) 61.44 Forfeited (45,129) 75.17 Outstanding at January 2, 2021 229,652 $ 66.41

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Jan. 02, 2021
Commitments and Contingencies Disclosure [Abstract]
Activity related to the warranty accrual	Activity related to the warranty accrual was as follows (in thousands): Fiscal Year Ended January 2, December 28, December 29, Balance at beginning of period $ 13,856 $ 11,964 $ 11,264 Provision 28,884 14,091 10,798 Warranty usage (18,348) (12,199) (10,098) Balance at end of period $ 24,392 $ 13,856 $ 11,964

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Jan. 02, 2021
Income Tax Disclosure [Abstract]
Schedule of income (loss) before provision for income taxes	Income (loss) before provision for income taxes was as follows (in thousands): Fiscal Year Ended January 2, December 28, December 29, Domestic $ 166,973 $ 84,225 $ 113,078 Foreign 20,942 14,608 (4,456) Income before income taxes $ 187,915 $ 98,833 $ 108,622
Components of income tax expense	The components of income tax expense were as follows (in thousands): Fiscal Year Ended January 2, December 28, December 29, Current Federal $ 13,593 $ 13,366 $ 17,627 State 2,724 5,004 3,676 Foreign 10,451 6,941 10,732 Total current income tax provision $ 26,768 $ 25,311 $ 32,035 Deferred Federal $ 14,695 $ (9,345) $ (2,475) State 2,552 (1,783) (1,149) Foreign (3,168) (650) (7,781) Total deferred income tax provision 14,079 (11,778) (11,405) Total income tax provision $ 40,847 $ 13,533 $ 20,630
Reconciliation of the expected tax (benefit) expense	The reconciliation of statutory federal income tax to actual tax expense is as follows (in thousands): Fiscal Year Ended January 2, December 28, December 29, Statutory federal income tax $ 39,462 $ 20,755 $ 22,812 State taxes (net of federal benefit) 4,834 3,999 4,312 Federal and state credits (6,702) (8,152) (5,638) Excess tax expense (benefits) relating to stock-based compensation 313 (6,468) (6,529) Tax Cuts and Jobs Act of 2017 — — 2,127 Foreign-derived intangible income deduction (3,360) (4,180) (2,678) EMEA business restructuring — — 2,292 Executive compensation 718 2,081 745 Tax impact of foreign earnings 1,458 1,986 1,336 Change in valuation allowance 3,817 2,678 348 Other 307 834 1,503 $ 40,847 $ 13,533 $ 20,630
Components of net deferred tax assets	The components of net deferred tax assets were as follows (in thousands): January 2, December 28, Deferred tax assets Revenue reserves $ 20,564 $ 21,355 Accruals and other liabilities 14,357 8,225 Operating lease liabilities 12,429 14,117 Tax credits and net operating loss carryforwards 12,748 8,814 Stock-based compensation 4,868 4,981 Other 3,793 5,068 Gross deferred tax assets 68,759 62,560 Valuation allowance (7,643) (3,826) Total deferred tax assets 61,116 58,734 Deferred tax liabilities Intangible assets 3,341 3,838 Operating lease right-of-use assets 11,443 13,249 Marketable equity securities 10,676 — Other 2,957 768 Total deferred tax liabilities 28,417 17,855 Net deferred tax assets $ 32,699 $ 40,879
Schedule of adjustments to uncertain tax position	A summary of the Company’s adjustments to its gross unrecognized tax benefits in the current year is as follows (in thousands): Fiscal Year Ended January 2, 2021 December 28, December 29, Balance at beginning of period $ 7,121 $ 7,119 $ 4,590 Increase for tax positions related to the current year 765 770 2,891 Increase for tax positions related to acquisition — — 1,493 Increase (decrease) for tax positions related to prior years 1,231 (768) 407 Decrease for settlements with applicable taxing authorities — — (2,262) Decrease for lapses of statute of limitations (558) — — Balance at end of period $ 8,559 $ 7,121 $ 7,119

Industry Segment, Geographic _2

Industry Segment, Geographic Information and Significant Customers Revenue by geography (Tables)	12 Months Ended
	Jan. 02, 2021
Schedule of revenue by geography [Line Items]
Schedule of revenue by geography [Table Text Block]	The following table provides information about revenue by geographical region (in thousands): January 2, 2021 December 28, 2019 December 29, 2018 Domestic $ 744,648 $ 603,618 $ 560,995 International 685,742 610,392 531,589 Total $ 1,430,390 $ 1,214,010 $ 1,092,584

Quarterly Information (Unaudi_2

Quarterly Information (Unaudited) (Tables)	12 Months Ended
	Jan. 02, 2021
Quarterly Financial Information Disclosure [Abstract]
Details of Quarterly Information (Unaudited)	The following information has been derived from unaudited consolidated financial statements that, in the opinion of management, include all recurring adjustments necessary for a fair statement of such information (in thousands, except per share amounts): Fiscal Quarter Ended January 2, September 26, June 27, March 28, December 28, September 28, June 29, March 30, Revenue $ 544,827 $ 413,145 $ 279,883 $ 192,535 $ 426,778 $ 289,399 $ 260,172 $ 237,661 Gross profit 215,421 198,841 178,012 77,955 169,370 136,841 118,170 119,546 Net income (loss) 13,335 93,252 58,616 (18,135) 20,041 35,532 7,207 22,520 Diluted income (loss) per share $ 0.46 $ 3.27 $ 2.07 $ (0.64) $ 0.70 $ 1.24 $ 0.25 $ 0.78

- Short Term Investments (Detai

- Short Term Investments (Details) - USD ($) $ in Thousands	Jan. 02, 2021	Dec. 28, 2019
Components of available for sale securities
Short-term investments, cost	$ 50,076	$ 17,016
Short-term investments, fair value	51,081	17,032
Corporate and government bonds
Components of available for sale securities
Debt securities, cost	3,498	17,016
Debt securities, fair value	3,505	17,032
Marketable equity securities
Components of available for sale securities
Equity securities, cost	$ 46,578	0
Equity securities, fair value		$ 0

- Accounts Receivable Allowance

- Accounts Receivable Allowances (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Allowance for other credits and incentives [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	$ 134,046	$ 97,737	$ 61,359
Adjustment related to adoption of ASC 606	0	0	1,192
Provision	285,139	284,084	196,858
Deduction	(277,012)	(247,775)	(161,672)
Balance at end of period	142,173	134,046	97,737
Allowance for product returns [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	55,191	53,920	42,693
Provision	68,028	69,488	67,391
Deduction	(58,876)	(68,217)	(56,164)
Balance at end of period	$ 64,343	$ 55,191	$ 53,920

- Property and Equipment (Detai

- Property and Equipment (Details)	12 Months Ended
	Jan. 02, 2021
Leasehold improvements
Property, Plant and Equipment [Line Items]
Capital Leases and Leasehold Improvements Terms	Lesser of economic benefit period or term of lease
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Minimum | Computer and equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	2 years
Minimum | Machinery and tooling
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	2 years
Minimum | Tooling
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	2 years
Minimum | Business applications software
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Maximum | Computer and equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Maximum | Machinery and tooling
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Maximum | Tooling
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Maximum | Business applications software
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	7 years

Summary of Significant Accoun_3

Summary of Significant Accounting Policies Other assets (Details) - USD ($) $ in Thousands, shares in Millions	Jul. 01, 2020	Jan. 31, 2021	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Security Owned Not Readily Marketable [Line Items]
Equity Securities without Readily Determinable Fair Value, Amount			$ 17,400	$ 21,000
Gain (Loss) on Sale of Equity Investments	$ 38,600		43,817	$ 8,439	$ 0
Number of shares (in shares)	0.2
Marketable Securities, Unrealized Gain (Loss)			4,900
Equity securities, FV-NI, restricted			$ 47,600
Subsequent Event
Security Owned Not Readily Marketable [Line Items]
Proceeds from sale of short-term investments		$ 51,500

Summary of Significant Accoun_4

Summary of Significant Accounting Policies Income taxes (Details) - USD ($) $ in Thousands	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Income taxes [Abstract]
Valuation allowance	$ 7,643	$ 3,826	$ 1,100

- Net Income Per Share (Details

- Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 02, 2021	Sep. 26, 2020	Jun. 27, 2020	Mar. 28, 2020	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Basic and Diluted Net Income Per Share
Net income	$ 13,335	$ 93,252	$ 58,616	$ (18,135)	$ 20,041	$ 35,532	$ 7,207	$ 22,520	$ 147,068	$ 85,300	$ 87,992
Weighted-average shares outstanding									28,101	28,097	27,692
Dilutive effect of employee stock plans									517	638	948
Diluted weighted-average shares outstanding									28,618	28,735	28,640
Basic									$ 5.23	$ 3.04	$ 3.18
Diluted	$ 0.46	$ 3.27	$ 2.07	$ (0.64)	$ 0.70	$ 1.24	$ 0.25	$ 0.78	$ 5.14	$ 2.97	$ 3.07

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Thousands, shares in Millions	Jul. 01, 2020	Jan. 31, 2021	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018	Apr. 24, 2020	Dec. 30, 2017
Accounting Policies [Line Items]
Equity Securities without Readily Determinable Fair Value, Amount			$ 17,400	$ 21,000
Allowance for credit loss, period increase (decrease)			3,600
Allowance for credit loss			4,800	1,200
Receivable for recovery of import duties, net			9,900			$ 57,000
Recovery of import duties			36,500
Proceeds from recovery of import duties			47,100
Advertising Expense			145,200	125,000	$ 114,000
Valuation allowance			$ 7,643	$ 3,826	$ 1,100
Antidilutive securities excluded from computation of earnings per share (in shares)			0.2	0.2	0
Number of shares (in shares)	0.2
Equity securities, FV-NI, restricted			$ 47,600
Subsequent Event
Accounting Policies [Line Items]
Proceeds from sale of short-term investments		$ 51,500
Customer Concentration Risk | Accounts Receivable | One Customer [Member]
Accounting Policies [Line Items]
Concentration risk percentage			17.60%
Customer Concentration Risk | Accounts Receivable | Two Customers [Member]
Accounting Policies [Line Items]
Concentration risk percentage				26.60%
Customer Concentration Risk | Revenue | Amazon [Member]
Accounting Policies [Line Items]
Concentration risk percentage			22.70%	21.30%	17.30%
Allowance for product returns
Accounting Policies [Line Items]
Valuation allowances and reserves			$ 64,343	$ 55,191	$ 53,920		$ 42,693

Revenue Recognition - Performan

Revenue Recognition - Performance Obligations (Details) - USD ($) $ in Millions	Jan. 02, 2021	Dec. 28, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-12-29
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation, amount		$ 4
Expected timing of satisfaction, period		1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-03
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation, amount	$ 11.5
Expected timing of satisfaction, period	1 year

Revenue Recognition Significant

Revenue Recognition Significant Judgments (Details) - USD ($) $ in Millions	Jan. 02, 2021	Dec. 28, 2019
Revenue from Contract with Customer [Abstract]
Refund liability, product returns	$ 64.3	$ 55.2
Refund liability, other credits and incentives	$ 142.2	$ 134

Revenue Recognition Disaggregat

Revenue Recognition Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 02, 2021	Sep. 26, 2020	Jun. 27, 2020	Mar. 28, 2020	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 544,827	$ 413,145	$ 279,883	$ 192,535	$ 426,778	$ 289,399	$ 260,172	$ 237,661	$ 1,430,390	$ 1,214,010	$ 1,092,584
UNITED STATES
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax									744,648	603,618	560,995
EMEA [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax									386,007	357,760	311,659
All Other Regions [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax									106,431	91,757	87,117
JAPAN
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax									$ 193,304	$ 160,875	$ 132,813

Revenue Recognition Contract Ba

Revenue Recognition Contract Balances (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019
Revenue from Contract with Customer [Abstract]
Accounts receivable, net	$ 170,526	$ 146,161
Contract with Customer, Liability	17,700	6,991
Contract with Customer, Liability, Revenue Recognized	$ 5,500	$ 5,800

Leases (Details)

Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Lessee, Lease, Description [Line Items]
Operating Lease, Weighted Average Discount Rate, Percent	3.56%
Operating Lease, Weighted Average Remaining Lease Term	8 years 3 months 18 days
Operating Lease, Cost	$ 9,363	$ 8,777
Variable Lease, Cost	3,583	4,096
Operating Leases, Rent Expense, Net	12,946	12,873
Operating Lease, Payments	9,862	9,540
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 2,310	$ 53,227
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccruedLiabilitiesCurrent	us-gaap:AccruedLiabilitiesCurrent
Operating lease right-of-use assets	$ 43,682	$ 47,478
Present value of future minimum lease payments	$ 56,800
Cumulative Effect, Period of Adoption, Adjustment
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets			$ 52,800
Present value of future minimum lease payments			$ 67,300

Leases Maturity of Operating Le

Leases Maturity of Operating Lease Liability (Details) - USD ($) $ in Thousands	Jan. 02, 2021	Dec. 28, 2019
Leases [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	$ 8,226
Lessee, Operating Lease, Liability, Payments, Due Year Two	8,633
Lessee, Operating Lease, Liability, Payments, Due Year Three	7,647
Lessee, Operating Lease, Liability, Payments, Due Year Four	6,590
Lessee, Operating Lease, Liability, Payments, Due Year Five	6,612
Lessee, Operating Lease, Liability, Payments, Due after Year Five	28,539
Lessee, Operating Lease, Liability, Payments, Due	66,247
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	9,447
Present value of future minimum lease payments	56,800
Current portion of operating lease liabilities	6,315	$ 6,843
Operating lease liabilities	$ 50,485	$ 54,928

Property and Equipment 1 (Detai

Property and Equipment 1 (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Property, Plant and Equipment [Line Items]
Subtotal	$ 160,012	$ 156,766
Less: accumulated depreciation	83,428	80,778
Property and equipment, net	76,584	75,988
Capitalized Computer Software, Net	6,500	6,800
Depreciation	31,900	24,400	$ 17,000
Capitalized Computer Software, Amortization	2,100	1,500	$ 1,200
Computer and equipment
Property, Plant and Equipment [Line Items]
Subtotal	13,617	13,588
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Subtotal	8,394	6,494
Machinery and tooling
Property, Plant and Equipment [Line Items]
Subtotal	80,715	79,213
Leasehold improvements
Property, Plant and Equipment [Line Items]
Subtotal	36,459	39,538
Business applications software
Property, Plant and Equipment [Line Items]
Subtotal	19,185	17,933
Other
Property, Plant and Equipment [Line Items]
Subtotal	$ 1,642	$ 0

Goodwill and other intangible_3

Goodwill and other intangible assets - Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, Acquired During Period		$ 2,050
Goodwill [Roll Forward]
Goodwill	$ 118,732	118,896
Effect of foreign currency translation	7,140	(2,214)
Goodwill	$ 125,872	$ 118,732

Goodwill and other intangible_4

Goodwill and other intangible assets - Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Finite-Lived Intangible Assets, Net [Abstract]
Cost	$ 74,526	$ 71,231
Accumulated Amortization	64,624	58,879
Net	9,902	12,352
Amortization of Intangible Assets	2,900	12,800	$ 19,600
Completed technology
Finite-Lived Intangible Assets, Net [Abstract]
Cost	28,100	28,100
Accumulated Amortization	26,525	24,605
Net	1,575	3,495
Tradename
Finite-Lived Intangible Assets, Net [Abstract]
Cost	100	100
Accumulated Amortization	100	100
Net	0	0
Customer relationships
Finite-Lived Intangible Assets, Net [Abstract]
Cost	11,728	11,095
Accumulated Amortization	3,401	2,302
Net	8,327	8,793
Reacquired distribution rights
Finite-Lived Intangible Assets, Net [Abstract]
Cost	34,318	31,680
Accumulated Amortization	34,318	31,680
Net	0	0
Non-competition agreements
Finite-Lived Intangible Assets, Net [Abstract]
Cost	280	256
Accumulated Amortization	280	192
Net	$ 0	$ 64

Goodwill and other intangible_5

Goodwill and other intangible assets - Future Amortization Expense (Details) - USD ($) $ in Thousands	Jan. 02, 2021	Dec. 28, 2019
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	$ 1,723
Finite-Lived Intangible Assets, Amortization Expense, Year Two	1,498
Finite-Lived Intangible Assets, Amortization Expense, Year Three	823
Finite-Lived Intangible Assets, Amortization Expense, Year Four	823
Finite-Lived Intangible Assets, Amortization Expense, Year Five	823
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	4,212
Net	9,902	$ 12,352
Cost of revenue
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	900
Finite-Lived Intangible Assets, Amortization Expense, Year Two	675
Finite-Lived Intangible Assets, Amortization Expense, Year Three	0
Finite-Lived Intangible Assets, Amortization Expense, Year Four	0
Finite-Lived Intangible Assets, Amortization Expense, Year Five	0
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	0
Net	1,575
Operating Expense [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	823
Finite-Lived Intangible Assets, Amortization Expense, Year Two	823
Finite-Lived Intangible Assets, Amortization Expense, Year Three	823
Finite-Lived Intangible Assets, Amortization Expense, Year Four	823
Finite-Lived Intangible Assets, Amortization Expense, Year Five	823
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	4,212
Net	$ 8,327

Accrued Expenses (Details)

Accrued Expenses (Details) - USD ($) $ in Thousands	Jan. 02, 2021	Dec. 28, 2019
Components of accrued expenses
Accrued bonus	$ 31,523	$ 12,541
Accrued warranty	24,392	13,856
Accrued compensation and benefits	17,635	13,331
Accrued sales and other indirect taxes payable	15,480	12,440
Accrued manufacturing and logistics cost	20,093	14,383
Current portion of operating lease liabilities	6,315	6,843
Accrued income taxes	3,806	3,378
Accrued other	12,144	4,996
Accrued expenses, total	$ 131,388	$ 81,768

Working Capital Facilities (Det

Working Capital Facilities (Details) $ in Thousands, ¥ in Millions	12 Months Ended
	Jan. 02, 2021USD ($)	Jan. 02, 2021JPY (¥)	Dec. 30, 2017USD ($)
Debt Disclosure [Abstract]
Letters of Credit Outstanding, Amount	$ 700
Revolving Line of Credit (Textual) [Abstract]
Maximum amount available for borrowing under credit facility	$ 150,000		$ 75,000
Interest on loans under the credit facility	at either (1) LIBOR plus a margin, currently equal to 1.0%, based on the Company's ratio of indebtedness to Adjusted EBITDA (the "Eurodollar Rate"), or (2) the lender's base rate.
Interest rate above the LIBOR Daily Floating Rate or the Prime Rate of Lender under condition one	1.00%	1.00%
Interest Rate Above the Federal Fund Rate Under Condition Two	0.50%	0.50%
Interest rate above the LIBOR rate plus under condition two	1.00%	1.00%
Line of Credit Facility, Amount Outstanding	$ 0
Letter of credit facility, maximum borrowing	$ 5,000
Line of credit, maximum amount | ¥		¥ 220

Derivative Instruments and He_2

Derivative Instruments and Hedging Activities - Fair Value of Derivatives (Details) - USD ($)	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019
Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	$ 192,200,000	$ 116,500,000
Foreign currency forward contracts | Derivatives not designated as hedging instruments: | Other current assets
Derivative, Fair Value, Net [Abstract]
Derivative Asset	261,000	1,855,000
Foreign currency forward contracts | Derivatives not designated as hedging instruments: | Accrued expenses
Derivative, Fair Value, Net [Abstract]
Derivative Liability	2,176,000	297,000
Derivatives not designated as hedging instruments: | Marketable equity securities
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	51,500,000
Forward Contracts | Derivatives not designated as hedging instruments: | Other current assets
Derivative, Fair Value, Net [Abstract]
Derivative Liability	3,904,000	0
Cash flow hedge | Derivatives designated as cash flow hedges:
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	431,900,000	424,600,000
Cash flow hedge | Foreign currency forward contracts | Derivatives designated as cash flow hedges: | Other current assets
Derivative, Fair Value, Net [Abstract]
Derivative Asset	362,000	4,347,000
Cash flow hedge | Foreign currency forward contracts | Derivatives designated as cash flow hedges: | Other assets
Derivative, Fair Value, Net [Abstract]
Derivative Asset	679,000	9,112,000
Cash flow hedge | Foreign currency forward contracts | Derivatives designated as cash flow hedges: | Accrued expenses
Derivative, Fair Value, Net [Abstract]
Derivative Liability	2,092,000	47,000
Cash flow hedge | Foreign currency forward contracts | Derivatives designated as cash flow hedges: | Other Noncurrent Liabilities [Member]
Derivative, Fair Value, Net [Abstract]
Derivative Liability	$ 8,554,000	$ 414,000
Maximum | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Derivative, Term of Contract	12 months
Maximum | Cash flow hedge | Derivatives designated as cash flow hedges:
Derivatives, Fair Value [Line Items]
Derivative, Term of Contract	3 years

Derivative Instruments and He_3

Derivative Instruments and Hedging Activities - Gain (Loss) on Derivatives (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 02, 2021	Sep. 26, 2020	Jun. 27, 2020	Mar. 28, 2020	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Revenue	$ 544,827	$ 413,145	$ 279,883	$ 192,535	$ 426,778	$ 289,399	$ 260,172	$ 237,661	$ 1,430,390	$ 1,214,010	$ 1,092,584
Cost of Goods and Services Sold									760,161	670,083	$ 537,156
Other income, net
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in income									(188)	89
Foreign currency forward contracts | Cash flow hedge
Derivative Instruments, Gain (Loss) [Line Items]
Effective portion, Gain (loss) recognized in OCI on Derivative									(18,504)	16,483
Foreign currency forward contracts | Revenue | Cash flow hedge
Derivative Instruments, Gain (Loss) [Line Items]
Effective portion, Gain (loss) reclassified from accumulated OCI into income									$ 4,783	$ 1,889
Derivatives designated as cash flow hedges: | Maximum | Cash flow hedge
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Term of Contract									3 years

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019
Liabilities:
Equity securities, unrealized gain	$ 1,000
Marketable equity securities
Assets:
Marketable securities, cost	46,578	$ 0
Marketable equity securities		0
Corporate and government bonds
Assets:
Corporate and government bonds, cost	3,498	17,016
Recurring | Level 1
Assets:
Corporate and government bonds	0	0
Derivative instruments (Note 9)	0	0
Total assets measured at fair value	95,105	0
Liabilities:
Derivative instruments (Note 9)	0	0
Total liabilities measured at fair value	0	0
Recurring | Level 1 | Marketable equity securities
Assets:
Marketable equity securities	47,576
Recurring | Level 1 | Money market funds
Assets:
Money market funds	47,529
Recurring | Level 2
Assets:
Marketable equity securities	0
Corporate and government bonds	3,505	17,032
Derivative instruments (Note 9)	5,206	15,314
Total assets measured at fair value	8,711	32,346
Liabilities:
Derivative instruments (Note 9)	12,822	758
Total liabilities measured at fair value	12,822	758
Recurring | Level 2 | Money market funds
Assets:
Money market funds	0
Recurring | Level 3
Assets:
Marketable equity securities	0
Corporate and government bonds	0	0
Derivative instruments (Note 9)	0	0
Total assets measured at fair value	0	0
Liabilities:
Derivative instruments (Note 9)	0	0
Total liabilities measured at fair value	0	$ 0
Recurring | Level 3 | Money market funds
Assets:
Money market funds	$ 0

Stockholders' Equity (Details)

Stockholders' Equity (Details) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 27, 2020USD ($)$ / sharesshares	Jan. 02, 2021USD ($)vote$ / sharesshares	Dec. 29, 2018USD ($)shares	Dec. 28, 2019$ / sharesshares	Feb. 27, 2018USD ($)
Equity [Abstract]
Preferred stock, shares authorized		5,000,000		5,000,000
Preferred stock, par value (in dollars per share) | $ / shares		$ 0.01		$ 0.01
Preferred stock, shares issued		0		0
Preferred stock, shares outstanding		0		0
Common stock, votes per share | vote		1
Stock repurchase program, authorized amount | $	$ 25,000				$ 200,000
Stock repurchases (in shares)	663,602		799,000
Treasury Stock Acquired, Average Cost Per Share | $ / shares	$ 37.65
Stock repurchases | $	$ 25,000	$ 25,000	$ 50,000

Stock-Based Compensation - Narr

Stock-Based Compensation - Narrative (Details) $ in Thousands	May 21, 2020shares	Jan. 02, 2021USD ($)planshares	Dec. 28, 2019USD ($)	Dec. 29, 2018USD ($)	May 23, 2018shares
Number of plans | plan		3
Number of additional shares authorized (in shares)	745,000
Number of shares available for grant		1,562,092
Share-based Payment Arrangement, Expense | $		$ 29,975	$ 23,744	$ 25,804
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	2,495,000				1,750,000

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock Options Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	0	0	0
Document Period End Date	Jan. 2, 2021
Compensation not yet recognized, options	$ 10
Summary of stock option plan activity
Number of Shares, Beginning Balance	322,908	462,261	712,954
Number of Shares, Exercised	(88,292)	(127,024)	(239,830)
Number of Shares, Canceled	(1,938)	(12,329)	(10,863)
Number of Shares, Ending Balance	232,678	322,908	462,261
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted Average Exercise Price, Beginning Balance (in dollars per share)	$ 35.08	$ 34.55	$ 34.34
Weighted Average Exercise Price, Granted (in dollars per share)	0	0	0
Weighted Average Exercise Price, Exercised (in dollars per share)	31.40	32.95	33.40
Weighted Average Exercise Price, Canceled (in dollars per share)	45.89	37.03	46.20
Weighted Average Exercise Price, Ending Balance (in dollars per share)	$ 36.39	$ 35.08	$ 34.55
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Number of Shares, Vested and expected to vest	232,678
Number of Shares, Exercisable	232,116
Weighted Average Exercise Price, Vested and expected to vest (in dollars per share)	$ 36.39
Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 36.34
Weighted Average Remaining Contractual Term, Vested and expected to vest	1 year 9 months
Weighted Average Remaining Contractual Term, Ending Balance	1 year 9 months
Weighted Average Remaining Contractual Term, Exercisable	1 year 9 months
Aggregate Intrinsic Value, Ending Balance	$ 10,210
Aggregate Intrinsic Value, Vested and expected to vest	10,210
Aggregate Intrinsic Value, Exercisable	$ 10,200
Share price (in dollars per share)	$ 80.29
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average remaining recognition period	2 months 4 days
Employee Stock Option | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	5 years
Employee Stock Option | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	10 years
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award	four year
Weighted average remaining recognition period	2 years 8 months 8 days

Stock-Based Compensation - St_2

Stock-Based Compensation - Stock Options Assumptions (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, exercises in period, intrinsic value	$ 2.6	$ 8.9	$ 14.9

Stock-Based Compensation - RSUs

Stock-Based Compensation - RSUs and PSUs (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Share price (in dollars per share)	$ 80.29
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost not yet recognized	$ 49.4
Weighted average remaining recognition period	2 years 8 months 8 days
Activities relating to restricted stock awards
Number of Shares Underlying Restricted Stock, Beginning Balance	819,232	855,889	938,453
Number of Shares Underlying Restricted Stock, Granted	493,908	407,325	307,614
Number of Shares Underlying Restricted Stock, Vested	(318,079)	(358,119)	(351,816)
Number of Shares Underlying Restricted Stock, Forfeited	(101,028)	(85,863)	(38,362)
Number of Shares Underlying Restricted Stock, Ending Balance	894,033	819,232	855,889
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted Average Grant Date Fair Value, Beginning Balance (in dollars per share)	$ 73.83	$ 63.32	$ 51.24
Weighted Average Grant Date Fair Value, Granted (in dollars per share)	61.53	79.91	81.55
Weighted Average Grant Date Fair Value, Vested (in dollars per share)	67.95	54.89	47.30
Weighted Average Grant Date Fair Value, Forfeited (in dollars per share)	75.20	76.85	60.62
Weighted Average Grant Date Fair Value, Ending Balance (in dollars per share)	$ 68.97	$ 73.83	$ 63.32
Outstanding, aggregate intrinsic value	$ 71.8
Outstanding, weighted average remaining contractual term	1 year 6 months 29 days
Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award	four year
Performance Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost not yet recognized	$ 9.1
Weighted average remaining recognition period	1 year 6 months
Activities relating to restricted stock awards
Number of Shares Underlying Restricted Stock, Beginning Balance	216,231	274,119	242,061
Number of Shares Underlying Restricted Stock, Granted	130,284	70,827	91,538
Number of Shares Underlying Restricted Stock, Vested	(71,734)	(78,943)	(56,259)
Number of Shares Underlying Restricted Stock, Forfeited	(45,129)	(49,772)	(3,221)
Number of Shares Underlying Restricted Stock, Ending Balance	229,652	216,231	274,119
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted Average Grant Date Fair Value, Beginning Balance (in dollars per share)	$ 78.42	$ 54.10	$ 43.97
Weighted Average Grant Date Fair Value, Granted (in dollars per share)	46.77	122.20	68.41
Weighted Average Grant Date Fair Value, Vested (in dollars per share)	61.44	33.33	34.30
Weighted Average Grant Date Fair Value, Forfeited (in dollars per share)	75.17	78.29	45.71
Weighted Average Grant Date Fair Value, Ending Balance (in dollars per share)	$ 66.41	$ 78.42	$ 54.10
Outstanding, aggregate intrinsic value	$ 18.4
Outstanding, weighted average remaining contractual term	1 year 6 months
Performance Based Restricted Stock Units | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights percentage	0.00%
Performance Based Restricted Stock Units | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights percentage	200.00%

Stock-Based Compensation - ESPP

Stock-Based Compensation - ESPP (Details) - USD ($)	1 Months Ended	12 Months Ended
	May 31, 2017	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum percentage of salary	15.00%
Maximum dollar amount	$ 4,000
Maximum number of shares per employee	1,000
Number of shares available for grant		1,562,092
Purchase price of common stock percent	85.00%
Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant		508,667
Share-based Payment Arrangement, Expensed and Capitalized, Amount		$ 1,000,000	$ 1,100,000	$ 1,000,000

Stock-Based Compensation Stock

Stock-Based Compensation Stock comp expense classification (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Share-based Payment Arrangement, Expense	$ 29,975	$ 23,744	$ 25,804
Share-based Payment Arrangement, Noncash Expense	29,975	23,744	25,804
Cost of revenue
Share-based Payment Arrangement, Expense	1,511	1,486	1,407
Research and Development Expense [Member]
Share-based Payment Arrangement, Expense	10,655	9,186	7,494
Selling and Marketing Expense [Member]
Share-based Payment Arrangement, Expense	3,700	3,323	2,842
General and Administrative Expense [Member]
Share-based Payment Arrangement, Expense	$ 14,109	$ 9,749	$ 14,061

Commitments and Contingencies_2

Commitments and Contingencies (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019
Commitments and Contingencies Disclosure [Abstract]
Rental expense under operating leases	$ 12,946	$ 12,873
Summary of future minimum rental payments under operating leases
Contractual Obligation	$ 341,900

Commitments and Contingencies_3

Commitments and Contingencies (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Activity related to the warranty accrual
Balance at beginning of period	$ 13,856	$ 11,964	$ 11,264
Provision	28,884	14,091	10,798
Warranty usage	(18,348)	(12,199)	(10,098)
Balance at end of period	$ 24,392	$ 13,856	$ 11,964

Employee Benefits (Details)

Employee Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Retirement Benefits [Abstract]
Defined Contribution Plan, Cost	$ 3	$ 2.9	$ 2.8
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	50.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	6.00%
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	3.00%

Income Taxes - Income (Loss) Be

Income Taxes - Income (Loss) Before Provision For Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Income Tax Disclosure [Abstract]
Domestic	$ 166,973	$ 84,225	$ 113,078
Foreign	20,942	14,608	(4,456)
Income before income taxes	$ 187,915	$ 98,833	$ 108,622

Income Taxes - Components of In

Income Taxes - Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Current
Federal	$ 13,593	$ 13,366	$ 17,627
State	2,724	5,004	3,676
Foreign	10,451	6,941	10,732
Total current income tax provision	26,768	25,311	32,035
Deferred
Federal	14,695	(9,345)	(2,475)
State	2,552	(1,783)	(1,149)
Foreign	(3,168)	(650)	(7,781)
Total deferred income tax provision	14,079	(11,778)	(11,405)
Total income tax provision	$ 40,847	$ 13,533	$ 20,630

Income Taxes - Effective Income

Income Taxes - Effective Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Reconciliation of the expected tax (benefit) expense
Statutory federal income tax	$ 39,462	$ 20,755	$ 22,812
State taxes (net of federal benefit)	4,834	3,999	4,312
Federal and state credits	(6,702)	(8,152)	(5,638)
Excess tax expense (benefits) relating to stock-based compensation	313	(6,468)	(6,529)
Tax Cuts and Jobs Act of 2017	0	0	2,127
Foreign-derived intangible income deduction	(3,360)	(4,180)	2,678
EMEA business restructuring	0	0	2,292
Executive compensation	718	2,081	745
Tax impact of foreign earnings	1,458	1,986	1,336
Change in valuation allowance	3,817	2,678	348
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions		(768)
Other	307	834	1,503
Total income tax provision	$ 40,847	$ 13,533	$ 20,630

Income Taxes - Net Deferred Tax

Income Taxes - Net Deferred Tax Assets (Details) - USD ($) $ in Thousands	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Deferred tax assets
Revenue reserves	$ 20,564	$ 21,355
Accruals and other liabilities	14,357	8,225
Operating lease liabilities	12,429	14,117
Tax credits and net operating loss carryforwards	12,748	8,814
Stock-based compensation	4,868	4,981
Other	3,793	5,068
Gross deferred tax assets	68,759	62,560
Valuation allowance	(7,643)	(3,826)	$ (1,100)
Total deferred tax assets	61,116	58,734
Deferred tax liabilities
Intangible assets	3,341	3,838
Operating lease right-of-use assets	11,443	13,249
Marketable equity securities	10,676	0
Other	2,957	768
Total deferred tax liabilities	28,417	17,855
Net deferred tax assets	$ 32,699	$ 40,879

Income Taxes - Unrecognized Tax

Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Company's adjustments to its uncertain tax position
Balance at beginning of period	$ 7,121	$ 7,119	$ 4,590
Increase for tax positions related to the current year	765	770	2,891
Increase for tax positions related to acquisition	0	0	1,493
Increase (decrease) for tax positions related to prior years		(768)
Increase for tax positions related to prior years	1,231		407
Decrease for settlements with applicable taxing authorities	0	0	(2,262)
Decrease for lapses of statute of limitations	(558)	0	0
Balance at end of period	$ 8,559	$ 7,121	$ 7,119

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($)	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	$ 1,700,000	$ 3,500,000
Valuation allowance	7,643,000	3,826,000	$ 1,100,000
Income tax penalties and interest accrued	0	0	$ 0
Unrecognized tax benefits that would impact effective tax rate	9,500,000
State and Local Jurisdiction
Tax Credit Carryforward [Line Items]
Tax credit carryforward	$ 16,300,000	$ 13,100,000

Industry Segment, Geographic _3

Industry Segment, Geographic Information and Significant Customers (Details Textual) $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 02, 2021USD ($)	Sep. 26, 2020USD ($)	Jun. 27, 2020USD ($)	Mar. 28, 2020USD ($)	Dec. 28, 2019USD ($)	Sep. 28, 2019USD ($)	Jun. 29, 2019USD ($)	Mar. 30, 2019USD ($)	Jan. 02, 2021USD ($)segment	Dec. 28, 2019USD ($)	Dec. 29, 2018USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of operating segments | segment									1
Revenue	$ 544,827	$ 413,145	$ 279,883	$ 192,535	$ 426,778	$ 289,399	$ 260,172	$ 237,661	$ 1,430,390	$ 1,214,010	$ 1,092,584
Customer Concentration Risk | Revenue | Amazon [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk percentage									22.70%	21.30%	17.30%
Non-US [Member] | Geographic Concentration Risk | Revenue
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk percentage									47.90%	50.30%	48.70%
Domestic Destination [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									$ 744,648	$ 603,618	$ 560,995
Geographic Distribution, Foreign [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									$ 685,742	$ 610,392	$ 531,589

Quarterly Information (Unaudi_3

Quarterly Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 02, 2021	Sep. 26, 2020	Jun. 27, 2020	Mar. 28, 2020	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Quarterly Financial Information Disclosure [Abstract]
Revenue	$ 544,827	$ 413,145	$ 279,883	$ 192,535	$ 426,778	$ 289,399	$ 260,172	$ 237,661	$ 1,430,390	$ 1,214,010	$ 1,092,584
Details of Quarterly Information (Unaudited)
Gross profit	215,421	198,841	178,012	77,955	169,370	136,841	118,170	119,546	670,229	543,927	555,428
Net income (loss)	$ 13,335	$ 93,252	$ 58,616	$ (18,135)	$ 20,041	$ 35,532	$ 7,207	$ 22,520	$ 147,068	$ 85,300	$ 87,992
Diluted	$ 0.46	$ 3.27	$ 2.07	$ (0.64)	$ 0.70	$ 1.24	$ 0.25	$ 0.78	$ 5.14	$ 2.97	$ 3.07

Maturity of Operating Lease Lia

Maturity of Operating Lease Liability (Details) (Details) $ in Thousands	Jan. 02, 2021USD ($)
Leases [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	$ 8,226