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Marketable Securities - Schedule of Available-for-Sale Securities Reconciliation (Detail) - USD ($) $ in Thousands	Sep. 26, 2020	Dec. 31, 2019
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 22,136	$ 1,642
Fair Value	22,136	1,642
Time Deposits [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	22,136	1,642
Fair Value	22,136	1,642
Cash Equivalents [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		213
Fair Value		213
Short-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	22,136	1,429
Fair Value	$ 22,136	$ 1,429

X

- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

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X

- Definition

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

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X

- Definition

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.

+ References

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