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Note 5 - Financial Instruments Measured at Fair Value

12 Months Ended

Dec. 25, 2021

Fair Value Measurement and Measurement Inputs, Recurring and Nonrecurring [Text Block]

5.	Financial Instruments Measured at Fair Value

Our cash, cash equivalents, and short-term investments consisted primarily of cash and other investment grade securities. We do not hold investment securities for trading purposes. All short-term investments in debt securities are classified as available-for-sale and recorded at fair value. Investment securities are exposed to market risk due to changes in interest rates and credit risk and we monitor credit risk and attempt to mitigate exposure by making high-quality investments and through investment diversification.

Gains and losses on investments are calculated using the specific-identification method and are recognized during the period in which the investment is sold or when an investment experiences an other-than-temporary decline in value. Factors that could indicate an impairment exists include, but are not limited to earnings performance, changes in credit rating or adverse changes in the regulatory or economic environment of the asset. Gross realized gains and losses on sales of short-term investments are included in interest income. Realized gains and losses for the periods presented were not significant.

Investments that we have classified as short-term, by security type, are as follows (in thousands):

	At December 25, 2021
			Gross		Gross		Estimated
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses ⁽¹⁾		Value
Corporate debt securities ⁽²⁾	$	84,060	$	2	$	31	$	84,031
U.S. treasury securities		3,953		-		5		3,948
Bank certificates of deposit		800		-		-		800
Foreign government security		925		-		-		925
	$	89,738	$	2	$	36	$	89,704

At December 26, 2020

Gross

Gross

Estimated

Amortized

Unrealized

Unrealized

Fair

Cost

Gains

Losses ⁽¹⁾

Value

Corporate debt securities ⁽²⁾
$ 14,943 $ 2 $ 1 $ 14,944

U.S. treasury securities
2,012 - - 2,012

Government-sponsored enterprise securities
1,998 - - 1,998

Bank certificates of deposit
750 - - 750

Foreign government security
965 - - 965

$ 20,668 $ 2 $ 1 $ 20,669

(1)

As of December 25, 2021, the cost and fair value of investments with loss positions were approximately $57.0 million. We evaluated the nature of these investments, credit worthiness of the issuer and the duration of these impairments to determine if an other-than-temporary decline in fair value had occurred and concluded that these losses were temporary and we have the ability and intent to hold these investments to maturity. As of December 26, 2020, the cost and fair value of investments with loss positions were approximately $8.7 million.

(2)

Corporate debt securities include investments in financial and other corporate institutions. No single issuer represents a significant portion of the total corporate debt securities portfolio.

Effective maturities of short-term investments at December 25, 2021, were as follows:

	Amortized		Estimated
(in thousands)	Cost		Fair Value
Due in one year or less	$	83,429	$	83,408
Due after one year through three years		6,309		6,296
	$	89,738	$	89,704

Accounting standards pertaining to fair value measurements establish a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value. These tiers include: Level 1, defined as observable inputs such as quoted prices in active markets; Level 2, defined as inputs other than quoted prices in active markets that are either directly or indirectly observable; and Level 3, defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions. When available, we use quoted market prices to determine the fair value of our investments, and they are included in Level 1. When quoted market prices are unobservable, we use quotes from independent pricing vendors based on recent trading activity and other relevant information.

The following table summarizes, by major security type, our financial instruments that are measured at fair value on a recurring basis and are categorized using the fair value hierarchy (in thousands):

	Fair value measurements at December 25, 2021 using:
							Total estimated
	Level 1		Level 2		Level 3		fair value
Cash	$	195,297	$	-	$	-	$	195,297
Money market funds		-		92,400		-		92,400
Foreign government security		-		925		-		925
Corporate debt securities		-		86,535		-		86,535
U.S. treasury securities		-		3,948		-		3,948
Bank certificates of deposit		-		800		-		800
	$	195,297	$	184,608	$	-	$	379,905

Fair value measurements at December 26, 2020 using:

Total estimated

Level 1

Level 2

Level 3

fair value

Cash
$ 128,874 $ - $ - $ 128,874

Money market funds
- 19,734 - 19,734

Corporate debt securities
- 15,694 - 15,694

U.S. treasury securities
- 2,012 - 2,012

Government-sponsored enterprise securities
- 1,998 - 1,998

Foreign government security
- 965 - 965

Bank certificates of deposit
- 750 - 750

$ 128,874 $ 41,153 $ - $ 170,027