Fair Value Measurements (Summary of Valuation of Company's Financial Instruments by Various Levels) (Details) - USD ($) $ in Thousands		Oct. 01, 2023	Dec. 31, 2022
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value		$ 122,569	$ 107,494
Liabilities measured at fair value		554	4,083
Quoted market prices in active markets (Level 1)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value		31,830	32,690
Liabilities measured at fair value		0	0
Significant other observable inputs (Level 2)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value		90,739	74,804
Liabilities measured at fair value		554	4,083
Cash Equivalents
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value		24,110	25,744
Cash Equivalents | Quoted market prices in active markets (Level 1)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value		24,110	25,744
Cash Equivalents | Significant other observable inputs (Level 2)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value		0	0
Trading securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value	[1]	7,720	6,946
Trading securities | Quoted market prices in active markets (Level 1)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value	[1]	7,720	6,946
Trading securities | Significant other observable inputs (Level 2)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value	[1]	0	0
Certificates of Deposit
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value	[1]		6
Certificates of Deposit | Quoted market prices in active markets (Level 1)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value	[1]		0
Certificates of Deposit | Significant other observable inputs (Level 2)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value	[1]		6
Available-for-sale Investments | U.S. Treasury Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value	[1]	88,693	73,800
Available-for-sale Investments | U.S. Treasury Securities | Quoted market prices in active markets (Level 1)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value	[1]	0	0
Available-for-sale Investments | U.S. Treasury Securities | Significant other observable inputs (Level 2)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value	[1]	88,693	73,800
Available For Sale Investments Convertible Debt Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value	[2]	173	346
Available For Sale Investments Convertible Debt Securities | Quoted market prices in active markets (Level 1)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value	[2]	0	0
Available For Sale Investments Convertible Debt Securities | Significant other observable inputs (Level 2)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value	[2]	173	346
Foreign currency forward contracts
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value	[3]	1,873	652
Liabilities measured at fair value	[4]	554	4,083
Foreign currency forward contracts | Quoted market prices in active markets (Level 1)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value	[3]	0	0
Liabilities measured at fair value	[4]	0	0
Foreign currency forward contracts | Significant other observable inputs (Level 2)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value	[3]	1,873	652
Liabilities measured at fair value	[4]	$ 554	$ 4,083

[1] Included in Short-term investments on the Company's unaudited condensed consolidated balance sheets.

[2] On the Company’s unaudited condensed consolidated balance sheets, $173,000 included in Short-term investments as of October 1, 2023, and $173,000 included in Short-term investments and the remaining included in Other non-current assets as of December 31, 2022.

[3] Included in Prepaid expenses and other current assets on the Company's unaudited condensed consolidated balance sheets.

[4] Included in Other accrued liabilities on the Company's unaudited condensed consolidated balance sheets.