Fair Value Measurements (Summary of Valuation of Company's Financial Instruments by Various Levels) (Details) - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value		$ 144,781	$ 133,208
Liabilities measured at fair value		45	1,691
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		36,340	34,290
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		108,441	98,918
Liabilities measured at fair value		45	1,691
Cash Equivalents
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value		27,848	25,986
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		27,848	25,986
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]	8,492	8,304
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]	8,492	8,304
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
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]	108,100	98,454
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]	108,100	98,454
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	[1]	173	173
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	[1]	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	[1]	173	173
Foreign currency forward contracts
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value	[2]	168	291
Liabilities measured at fair value	[3]	45	1,691
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	[2]	0	0
Liabilities measured at fair value	[3]	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	[2]	168	291
Liabilities measured at fair value	[3]	$ 45	$ 1,691

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

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

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