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Investment Securities	3 Months Ended
Investment Securities	Aug. 27, 2022
Investments Securities [Abstract]
Investment Securities	Note 2 - Investment Securities The following represents the Company’s investment securities as of August 27, 2022 and May 28, 2022 (in thousands): August 27, 2022 Amortized Cost Unrealized Gains Unrealized Losses Estimated Fair Value Municipal bonds $ 15,032 $ — $ 155 $ 14,877 Commercial paper 15,936 — 53 15,883 Corporate bonds 81,711 — 1,237 80,474 Certificates of deposits 3,263 — 48 3,215 US government and agency obligations 8,190 — 87 8,103 Asset backed securities 15,620 — 227 15,393 Treasury bills 7,870 — 31 7,839 Total current investment securities $ 147,622 $ — $ 1,838 $ 145,784 Mutual funds $ 3,467 $ — $ 130 $ 3,337 Total noncurrent investment securities $ 3,467 $ — $ 130 $ 3,337 May 28, 2022 Amortized Cost Unrealized Gains Unrealized Losses Estimated Fair Value Municipal bonds $ 10,136 $ — $ 32 $ 10,104 Commercial paper 14,940 — 72 14,868 Corporate bonds 74,167 — 483 73,684 Certificates of deposits 1,263 — 18 1,245 US government and agency obligations 2,205 4 — 2,209 Asset backed securities 13,456 — 137 13,319 Total current investment securities $ 116,167 $ 4 $ 742 $ 115,429 Mutual funds $ 3,826 $ — $ 74 $ 3,752 Total noncurrent investment securities $ 3,826 $ — $ 74 $ 3,752 Available-for-sale Proceeds from sales and maturities of investment securities available-for-sale were $ 20.3 million and $ 39.4 million during the thirteen weeks ended August 27, 2022 and August 28, 2021, respectively. Gross realized gains for the thirteen weeks ended August 27, 2022 and August 28, 2021 were $ 2 thousand and $ 127 thousand, respectively. Gross realized losses for the thirteen weeks ended August 27, 2022 and August 28, 2021 were $ 27 thousand and $ 60 thousand, respectively. There were no allowances for credit losses at August 27, 2022 and May 28, 2022. Actual maturities may differ from contractual maturities as some borrowers have the right to call or prepay obligations with or without penalties. Contractual maturities of current investments at August 27, 2022 are as follows (in thousands): Estimated Fair Value Within one year $ 64,148 1-5 years 81,636 Total $ 145,784 Noncurrent There were no sales of noncurrent investment securities during the thirteen weeks ended August 27, 2022. Proceeds from sales and maturities of noncurrent investment securities were $ 385 thousand during the thirteen weeks ended August 28, 2021. Gross realized gains for the thirteen weeks ended August 28, 2021 were $ 130 thousand. There were no realized losses for the thirteen weeks ended August 28, 2021.