XML 55 R34.htm IDEA: XBRL DOCUMENT v3.25.4

Note 5 - Financial Instruments Measured at Fair Value (Tables)

12 Months Ended

Dec. 27, 2025

Notes Tables

Unrealized Gain (Loss) on Investments [Table Text Block]

		At December 27, 2025
						Gross				Gross				Estimated
		Amortized				Unrealized				Unrealized				Fair
		Cost				Gains				Losses (1)				Value
Corporate debt securities (2)		$	150,314			$	60			$	13			$	150,361
Bank certificates of deposit			58,130				26				-				58,156
U.S. treasury securities			37,584				68				-				37,652
Asset-backed securities			10,038				18				-				10,056
Foreign government security			703				-				-				703
		$	256,769			$	172			$	13			$	256,928

		At December 28, 2024
						Gross				Gross				Estimated
		Amortized				Unrealized				Unrealized				Fair
		Cost				Gains				Losses (1)				Value
Corporate debt securities (2)		$	32,040			$	37			$	25			$	32,052
U.S. treasury securities			11,964				12				15				11,961
Bank certificates of deposit			6,971				4				3				6,972
Asset-backed securities			3,647				6				-				3,653
Foreign government security			714				-				-				714
Municipal securities			330				3				-				333
		$	55,666			$	62			$	43			$	55,685

Investments Classified by Contractual Maturity Date [Table Text Block]

		Amortized				Estimated
(in thousands)		Cost				Fair Value
Due in 1 year or less		$	200,379			$	200,436
Due after 1 year through 5 years			56,390				56,492
		$	256,769			$	256,928

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

		Fair value measurements at December 27, 2025 using:
														Total estimated
		Level 1				Level 2				Level 3				fair value
Cash		$	142,091			$	-			$	-			$	142,091
Corporate debt securities			-				183,611				-				183,611
Bank certificates of deposit			-				58,156				-				58,156
Money market funds			-				51,712				-				51,712
U.S. treasury securities			-				37,652				-				37,652
Asset-backed securities			-				10,056				-				10,056
Foreign government security			-				703				-				703
		$	142,091			$	341,890			$	-			$	483,981

		Fair value measurements at December 28, 2024 using:
														Total estimated
		Level 1				Level 2				Level 3				fair value
Cash		$	136,965			$	-			$	-			$	136,965
Money market funds			-				69,442				-				69,442
Corporate debt securities			-				32,052				-				32,052
U.S. treasury securities			-				11,961				-				11,961
Bank certificates of deposit			-				6,972				-				6,972
Asset-backed securities			-				3,653				-				3,653
Municipal securities			-				333				-				333
Foreign government security			-				714				-				714
		$	136,965			$	125,127			$	-			$	262,092

X

- Definition

Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

+ Details

Name:	us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments.

+ References

No definition available.

+ Details

Name:	us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_TableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of unrealized gains and losses on investments.

+ References

No definition available.

+ Details

Name:	us-gaap_UnrealizedGainLossOnInvestmentsTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration