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Acquisitions - Additional Information (Detail) - USD ($) $ in Thousands | Feb. 18, 2022 | Dec. 21, 2021 | Aug. 16, 2021 | Jul. 30, 2021 | Mar. 22, 2021 | Oct. 26, 2020 | Dec. 31, 2022 | Jan. 01, 2022 | Jan. 02, 2021
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Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  | $ 155,998 | $ 157,374 | $ 155,617
Business acquisition, purchase price allocation, tax asset valuation allowance |  |  |  |  |  |  | $ 35,818 | $ 10,083 |
Denross Limited |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Business acquisition, aggregate purchase price | $ 4,500 |  |  |  |  |  |  |  |
Business acquisition, cash payment | 3,100 | $ 650 |  |  |  |  |  |  |
Business acquisition, cash in reserves | 750 |  |  |  |  |  |  |  |
Business acquisition, purchase price allocation, assumed liabilities | 166 |  |  |  |  |  |  |  |
Goodwill | 4,645 |  |  |  |  |  |  |  |
Business acquisition, purchase price allocation, deferred tax asset | 496 |  |  |  |  |  |  |  |
Business acquisition, purchase price allocation, tax asset valuation allowance | 496 |  |  |  |  |  |  |  |
Business acquisition, purchase price allocation, cash | 4 |  |  |  |  |  |  |  |
Business acquisition, purchase price allocation, other receivables | 3 |  |  |  |  |  |  |  |
Denross Limited | Customer Relationship |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Business acquisition, purchase price allocation, finite lived intangible assets | 14 |  |  |  |  |  |  |  |
Checkweight Limited |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Business acquisition, aggregate purchase price | 1,500 |  |  |  |  |  |  |  |
Business acquisition, cash payment | 1,250 |  |  |  |  |  |  |  |
Business acquisition, cash in reserves | 250 |  |  |  |  |  |  |  |
Business acquisition, purchase price allocation, assumed liabilities | 56 |  |  |  |  |  |  |  |
Goodwill | 1,291 |  |  |  |  |  |  |  |
Business acquisition, purchase price allocation, deferred tax asset | 5 |  |  |  |  |  |  |  |
Business acquisition, purchase price allocation, tax asset valuation allowance | 5 |  |  |  |  |  |  |  |
Business acquisition, purchase price allocation, cash | 4 |  |  |  |  |  |  |  |
Business acquisition, purchase price allocation, other receivables | 4 |  |  |  |  |  |  |  |
Checkweight Limited | Franchise Rights Acquired |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Business acquisition, purchase price allocation, finite lived intangible assets | 240 |  |  |  |  |  |  |  |
Checkweight Limited | Customer Relationship |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Business acquisition, purchase price allocation, finite lived intangible assets | $ 17 |  |  |  |  |  |  |  |
Weight Watchers of Maine, Inc. |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Business acquisition, aggregate purchase price |  |  | $ 2,250 |  |  |  |  |  |
Business acquisition, cash payment |  |  | 1,999 |  |  |  |  |  |
Business acquisition, cash in reserves |  |  | 225 |  |  |  |  |  |
Business acquisition, assumed net liabilities |  |  | 26 |  |  |  |  |  |
Goodwill |  |  | 2,153 |  |  |  |  |  |
Weight Watchers of Maine, Inc. | Franchise Rights Acquired |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Business acquisition, purchase price allocation, finite lived intangible assets |  |  | 41 |  |  |  |  |  |
Weight Watchers of Maine, Inc. | Customer Relationship |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Business acquisition, purchase price allocation, finite lived intangible assets |  |  | $ 56 |  |  |  |  |  |
The WW Group, Inc. |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Business acquisition, aggregate purchase price |  |  |  |  | $ 17,500 |  |  |  |
Business acquisition, cash payment |  |  |  | $ 6,450 | 8,255 |  |  |  |
Business acquisition, cash in reserves |  |  |  |  | 2,300 |  |  |  |
Business acquisition, assumed net liabilities |  |  |  |  | 495 |  |  |  |
Business acquisition, purchase price allocation, inventories |  |  |  |  | 162 |  |  |  |
Business acquisition, purchase price allocation, property and equipment |  |  |  |  | 41 |  |  |  |
Business acquisition, purchase price allocation, other assets |  |  |  |  | 4 |  |  |  |
The WW Group, Inc. | Franchise Rights Acquired |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Business acquisition, purchase price allocation, indefinite lived intangible assets |  |  |  |  | 16,885 |  |  |  |
The WW Group, Inc. | Customer Relationship |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Business acquisition, purchase price allocation, finite lived intangible assets |  |  |  |  | 408 |  |  |  |
The WW Group Co. |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Business acquisition, aggregate purchase price |  |  |  |  | 3,114 |  |  |  |
Business acquisition, cash payment |  |  |  |  | 2,605 |  |  |  |
Business acquisition, cash in reserves |  |  |  |  | 599 |  |  |  |
Business acquisition, assumed net assets |  |  |  |  | 90 |  |  |  |
Business acquisition, purchase price allocation, inventories |  |  |  |  | 6 |  |  |  |
Business acquisition, purchase price allocation, property and equipment |  |  |  |  | 25 |  |  |  |
Business acquisition, purchase price allocation, other assets |  |  |  |  | 1 |  |  |  |
The WW Group Co. | Franchise Rights Acquired |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Business acquisition, purchase price allocation, indefinite lived intangible assets |  |  |  |  | 3,040 |  |  |  |
The WW Group Co. | Customer Relationship |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Business acquisition, purchase price allocation, finite lived intangible assets |  |  |  |  | $ 42 |  |  |  |
Weight Watchers of Arizona, Inc. and Weight Watchers Imperial County, Inc. |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Business acquisition, aggregate purchase price |  |  |  |  |  | $ 10,000 |  |  |
Business acquisition, cash payment |  |  |  |  |  | 10,037 |  |  |
Business acquisition, assumed net assets |  |  |  |  |  | 37 |  |  |
Business acquisition, purchase price allocation, inventories |  |  |  |  |  | 84 |  |  |
Business acquisition, purchase price allocation, property and equipment |  |  |  |  |  | 131 |  |  |
Business acquisition, purchase price allocation, current assets, other |  |  |  |  |  | 12 |  |  |
Weight Watchers of Arizona, Inc. and Weight Watchers Imperial County, Inc. | Franchise Rights Acquired |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Business acquisition, purchase price allocation, indefinite lived intangible assets |  |  |  |  |  | 9,546 |  |  |
Weight Watchers of Arizona, Inc. and Weight Watchers Imperial County, Inc. | Customer Relationship |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Business acquisition, purchase price allocation, finite lived intangible assets |  |  |  |  |  | $ 227 |  |  |

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- Definition Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479907/805-20-50-1 + Details
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