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Marketable Securities | 12 Months Ended
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Dec. 31, 2022
Marketable Securities [Abstract] |
Marketable Securities | 4. Marketable Securities: At December 31, 2022 and January 1, 2022, marketable securities are categorized as follows:
|  | Amortized Cost |  |  | Gross Unrealized Holding Gains |  |  | Gross Unrealized Holding Losses |  |  | Fair Value |
December 31, 2022 |  |  |  |  |  |  |  |  |  |  |  |
Municipal notes and bonds |  | $ | 181,196 |  |  | $ | 27 |  |  | $ | 2,355 |  |  | $ | 178,868 |
Asset-backed securities |  |  | 1,555 |  |  |  | — |  |  |  | 21 |  |  |  | 1,534 |
Certificates of deposit |  |  | 52,190 |  |  |  | 24 |  |  |  | 118 |  |  |  | 52,095 |
Commercial paper |  |  | 80,199 |  |  |  | 16 |  |  |  | 136 |  |  |  | 80,079 |
Corporate bonds |  |  | 60,334 |  |  |  | 4 |  |  |  | 1,003 |  |  |  | 59,335 |
Total marketable securities |  | $ | 375,474 |  |  | $ | 71 |  |  | $ | 3,633 |  |  | $ | 371,912 |
January 1, 2022 |  |  |  |  |  |  |  |  |  |  |  |
Municipal notes and bonds |  | $ | 171,203 |  |  | $ | 38 |  |  | $ | 261 |  |  | $ | 170,980 |
Asset-backed securities |  |  | 2,009 |  |  |  | — |  |  |  | — |  |  |  | 2,009 |
Certificates of deposit |  |  | 33,200 |  |  |  | 2 |  |  |  | 10 |  |  |  | 33,192 |
Commercial paper |  |  | 73,152 |  |  |  | 2 |  |  |  | 41 |  |  |  | 73,113 |
Corporate bonds |  |  | 62,634 |  |  |  | 29 |  |  |  | 216 |  |  |  | 62,447 |
Total marketable securities |  | $ | 342,198 |  |  | $ | 71 |  |  | $ | 528 |  |  | $ | 341,741 |
The amortized cost and estimated fair value of marketable securities classified by the maturity date listed on the security, regardless of the Consolidated Balance Sheet classification, is as follows at December 31, 2022 and January 1, 2022:
|  | December 31, 2022 |  |  | January 1, 2022 |
|  | Amortized Cost |  |  | Fair Value |  |  | Amortized Cost |  |  | Fair Value |
Due within one year |  | $ | 311,934 |  |  | $ | 309,385 |  |  | $ | 219,353 |  |  | $ | 219,211 |
Due after one through five years |  |  | 63,540 |  |  |  | 62,527 |  |  |  | 122,845 |  |  |  | 122,530 |
Due after five through ten years |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Due after ten years |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Total marketable securities |  | $ | 375,474 |  |  | $ | 371,912 |  |  | $ | 342,198 |  |  | $ | 341,741 |
The following table summarizes the estimated fair value and gross unrealized holding losses of marketable securities, aggregated by investment instrument and period of time in an unrealized loss position, at December 31, 2022 and January 1, 2022.
|  | In Unrealized Loss Position For Less Than 12 Months |  |  | In Unrealized Loss Position For Greater Than 12 Months |
|  | Fair Value |  |  | Gross Unrealized Losses |  |  | Fair Value |  |  | Gross Unrealized Losses |
December 31, 2022 |  |  |  |  |  |  |  |  |  |  |  |
Municipal notes and bonds |  | $ | 96,301 |  |  | $ | 1,273 |  |  | $ | 69,159 |  |  | $ | 1,082 |
Asset-backed securities |  |  | 1,555 |  |  |  | 21 |  |  |  | — |  |  |  | — |
Certificates of deposit |  |  | 22,400 |  |  |  | 118 |  |  |  | — |  |  |  | — |
Commercial paper |  |  | 50,550 |  |  |  | 136 |  |  |  | — |  |  |  | — |
Corporate bonds |  |  | 28,975 |  |  |  | 637 |  |  |  | 28,769 |  |  |  | 366 |
Total marketable securities |  | $ | 199,781 |  |  | $ | 2,185 |  |  | $ | 97,928 |  |  | $ | 1,448 |
January 1, 2022 |  |  |  |  |  |  |  |  |  |  |  |
Municipal notes and bonds |  | $ | 113,790 |  |  | $ | 262 |  |  | $ | — |  |  | $ | — |
Certificates of deposit |  |  | 16,300 |  |  |  | 10 |  |  |  | — |  |  |  | — |
Commercial paper |  |  | 58,681 |  |  |  | 40 |  |  |  | — |  |  |  | — |
Corporate bonds |  |  | 53,661 |  |  |  | 150 |  |  |  | 2,587 |  |  |  | 66 |
Total marketable securities |  | $ | 242,432 |  |  | $ | 462 |  |  | $ | 2,587 |  |  | $ | 66 |
See Note 3 for additional discussion regarding the fair value of the Company’s marketable securities.

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -URI https://asc.fasb.org/subtopic&trid=2209399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -URI https://asc.fasb.org/subtopic&trid=2324412 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI https://asc.fasb.org/topic&trid=2196928 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -URI https://asc.fasb.org/subtopic&trid=2176304 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1403 -Paragraph (b) + Details
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