Balance Sheet Components (Narrative) (Details) - USD ($)	3 Months Ended	9 Months Ended
Oct. 01, 2023	Oct. 02, 2022	Oct. 01, 2023	Oct. 02, 2022
Balance Sheet Related Disclosures [Line Items]
Accrued interest receivable	$ 300,000		$ 300,000
Unrealized losses on available-for-sale securities	0	$ 0	0	$ 0
Other-than-temporary impairments	0	0	0	0
Provisions for excess and obsolete inventory	1,200,000	400,000	2,705,000	3,005,000
Equity securities without readily determinable fair value, cumulative downward adjustments for price change and impairment loss	0		0
Cumulative upward adjustments for price changes	300,000		300,000
Amortization expense		$ 100,000	300,000	$ 400,000
Other asset impairment charges			$ 0
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Balance Sheet Related Disclosures [Line Items]
Intangible assets impairment charges	$ 1,100,000

Balance sheet related disclosures.

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Unrealized losses on available-for-sale securities recognized in income.

+ References

No definition available.

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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- Definition

Amount of cumulative impairment loss on investment in equity security without readily determinable fair value.

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Amount of cumulative gain from upward price adjustment on investment in equity security without readily determinable fair value.

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- Definition

Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

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- Definition

Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable.

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- Definition

Amount of loss from reductions in inventory due to subsequent measurement adjustments, including, but not limited to, physical deterioration, obsolescence, or changes in price levels.

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The charge against earnings resulting from the write down of long lived assets other than goodwill due to the difference between the carrying value and lower fair value.

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Amount of other-than-temporary impairment (OTTI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), recognized in earnings.

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