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Fair Value (Tables)
3 Months Ended
Apr. 03, 2021
Fair Value Disclosures [Abstract]  
Schedule of fair value measurements
The following table presents the items measured at fair value as of April 3, 2021 and December 31, 2020:

 Fair Value
April 3,
2021
December 31, 2020
Cash and cash equivalents:
Money market fund (Level 1)$100,898 197,835 
Short-term investments:
Short-term investments (Level 1) (1)
782,267 571,741 
(1) The Company's short-term investments are in a short-duration bond fund and a managed income fund that are designed to deliver current income consistent with the preservation of capital through investing in high-and medium grade fixed income securities. The investments are readily convertible into cash.