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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Aggregate cash paid by the entity during the period to settle equity instruments granted under equity-based payment arrangements.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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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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Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3).

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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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 were forfeited during the reporting period.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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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 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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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Number of shares issued under share-based payment arrangement.

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Price of a single share of a number of saleable stocks of a company.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Equity-based compensation - Narrative (Details)	3 Months Ended
Equity-based compensation - Narrative (Details)	Apr. 02, 2022 USD ($) $ / shares shares	Apr. 03, 2021 USD ($) shares	Feb. 15, 2021 plan	Feb. 10, 2021 plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of equity-based compensation plans \| plan			2	2
Income tax benefit	$ (5,132,000)	$ (73,000)
Unamortized compensation expense, options	18,380,000
2021 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity compensation	4,731,000	1,944,000
Income tax benefit	$ 1,225,000	$ 0
Common Class A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock closing price, (in dollars per share) \| $ / shares	$ 13.63
Common Class A \| 2021 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized to be awarded (in shares) \| shares	11,873,784
Number of shares available to be awarded (in shares) \| shares	2,876,822
Management Incentive Plan Award
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards granted (in shares) \| shares	0
Phantom Share Units (PSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards granted (in shares) \| shares	90,000
Number of awards forfeited (in shares) \| shares	900,000
Cash paid to settle award	$ 479,000
Equity compensation	829,000
Change in fair value	(25,185,000)
Phantom Share Units (PSUs) \| Research and Development Expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity compensation	$ (1,777,000)
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards granted (in shares) \| shares	903,000
Number of awards forfeited (in shares) \| shares	33,000
Unamortized compensation expense, RSUs	$ 13,321,000
Compensation expense net yet amortized, period for recognition	3 years 4 months 20 days
RSUs \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	1 year
RSUs \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average fair value of stock options granted (in dollars per share) \| $ / shares	$ 4.68
Compensation expense net yet amortized, period for recognition	3 years 9 months 7 days
Expiration period	10 years
Stock options \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	2 years
Stock options \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity compensation	$ 158,000
Number of shares available to be awarded (in shares) \| shares	398,532
Number of shares issued (in shares) \| shares	48,993	0