Third party insurer's coverage purchased for catastrophic occurrences during the period.

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The amount of gains pertaining to the specified contingency that was charged against cost of sales in the period, including the effects of revisions in previously reported estimates.

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Number of motions filed by the defendant.

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Number of patents cases to be consolidated for which the defendant has filed a motion.

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Number of patents-in-suit.

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Number of risk areas of the entity that involve the most significant accounting estimates.

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Maximum annual stop loss limit per participant, self insured by the entity.

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Maximum coverage per occurrence, self insured by the company.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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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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Amount of loss contingency liability.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349

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The amount of loss pertaining to the specified contingency that was charged against earnings in the period, including the effects of revisions in previously reported estimates.

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Carrying amount (including both current and noncurrent portions) of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property.

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Commitments and Contingencies - (Details) - Hman Group holdings Inc and subsidiaries $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 27, 2021 USD ($) area	Dec. 26, 2020 USD ($) item	Dec. 28, 2019 USD ($)	Dec. 29, 2018 USD ($)	Aug. 31, 2020 item	Jun. 23, 2020 item	Apr. 14, 2020 item	Jul. 25, 2019 item
Loss Contingencies [Line Items]
Number of risk areas that involve the most significant accounting estimates	2	2
Insurance for product liability, automotive, workers' compensation, and general liability losses
Loss Contingencies [Line Items]
Self insurance amount per occurrence	$ 250	$ 250
Outstanding letters of credit	25,908	23,590
Insurance for workers' compensation and automotive liability
Loss Contingencies [Line Items]
Risk insurance reserves	2,476	2,488
Insurance for general liability
Loss Contingencies [Line Items]
Self insurance amount per occurrence	500
Group health insurance
Loss Contingencies [Line Items]
Risk insurance reserves	2,512	2,609
Maximum annual stop loss limit per participant	250	250
Patent infringement case against KeyMe
Loss Contingencies [Line Items]
Number of motions filed by the defendant \| item					2			2
Number of patents-in-suit \| item						3
Number of patent cases to be consolidated \| item							2
Loss contingency for anti-dumping duty and countervailing duty laws
Loss Contingencies [Line Items]
Liability for loss contingencies		2,446
Income from loss contingencies				$ 3,829
Expenses from loss contingencies		0	$ 0
Minimum
Loss Contingencies [Line Items]
Catastrophic coverage	250	250
Maximum
Loss Contingencies [Line Items]
Catastrophic coverage	$ 60,000	$ 60,000