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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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Amount of cost to be recognized for option under share-based payment arrangement.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of additional shares authorized for issuance under share-based payment arrangement.

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Number of shares authorized for issuance under share-based payment arrangement.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Number of options outstanding, including both vested and non-vested options.

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Number of shares issued under share-based payment arrangement.

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The fair value of stock issued in noncash financing activities.

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Share-Based Compensation - Narrative (Details)		3 Months Ended		9 Months Ended		12 Months Ended
Share-Based Compensation - Narrative (Details)	Jan. 01, 2021 shares	Oct. 01, 2022 USD ($) shares	Oct. 02, 2021 USD ($)	Oct. 01, 2022 USD ($) shares	Oct. 02, 2021 USD ($) director shares	Dec. 31, 2021 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for issuance	20,915,919
Stock options outstanding (in shares)		4,185,008		4,185,008		3,956,364
Shares issued for stock option exercises (in shares)				(8,103,388)		(7,730,884)
Shares available for grant (in shares)		7,870,434		7,870,434		6,515,807
Reclassification of other current liability to additional paid-in capital in connection with the share-settled obligation \| $				$ 0	$ 2,535,000
Number of new directors \| director					2
RSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issuable (in shares)		830,256		830,256		608,175
Vesting period					3 years
Share-based compensation expense \| $		$ 5,200,000	$ 3,100,000	$ 16,400,000	$ 9,300,000
Unrecognized compensation expense, period of recognition				1 year 3 months 18 days
Vested (in shares)				158,770
Unrecognized share-based compensation expense \| $		31,600,000		$ 31,600,000
RSU \| Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period				4 years	4 years
RSU \| Non-employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period				1 year
RSU \| Executive Officer \| Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage					100.00%
Vesting period					3 months
Vested (in shares)					20,872
RSU \| Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period				1 year	1 year
RSU \| New Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period				3 years	3 years
RSU \| Executive Officer, One \| Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period				1 year
RSU \| First Anniversary \| New Employees \| Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage				25.00%	25.00%
RSU \| First Anniversary \| Continuing Employees \| Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage				50.00%
RSU \| Thereafter \| New Employees \| Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period				3 years
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense \| $		4,100,000	3,400,000	$ 12,500,000	$ 10,500,000
Unrecognized compensation expense \| $		22,800,000		$ 22,800,000
Unrecognized compensation expense, period of recognition				1 year 3 months 18 days
Stock Options \| Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period				48 months	48 months
Stock Options \| Executive Officer \| Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period				3 months
Stock Options \| First Anniversary \| New Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage				25.00%	25.00%
Stock Options \| First Anniversary \| Continuing Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage					25.00%
Vesting period				3 years
Stock Options \| Thereafter \| New Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period				3 years	3 years
Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Accrual for share-settled obligation \| $		0		$ 0	$ 1,600,000
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense \| $		$ 0	$ 0	$ 0	$ 200,000
Shares of restricted stock purchased by nonemployees (in shares)		0		0
Unrecognized share-based compensation expense \| $		$ 0		$ 0
2018 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of additional shares authorized	2,144,521			2,144,521
Shares available for grant (in shares)		7,870,434		7,870,434		6,515,807
2018 ESPP \| Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for issuance		2,412,585		2,412,585
Number of additional shares authorized per year	536,130