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Investments and Fair Value Measurements - Components of Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Cost Basis	$ 71,423	$ 105,546
Unrealized Gains (Losses)	(215)	(22)
Market Value	71,208	105,524
Cash and Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Market Value	9,438	38,301
Short-term Investments and Marketable Securities
Debt Securities, Available-for-sale [Line Items]
Market Value	59,748	55,179
Long-term Investments
Debt Securities, Available-for-sale [Line Items]
Market Value	2,022	12,044
Level 1 | Money market fund
Debt Securities, Available-for-sale [Line Items]
Cost Basis	9,438	38,301
Unrealized Gains (Losses)	0	0
Market Value	9,438	38,301
Level 1 | Money market fund | Cash and Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Market Value	9,438	38,301
Level 1 | Money market fund | Short-term Investments and Marketable Securities
Debt Securities, Available-for-sale [Line Items]
Market Value	0	0
Level 1 | Money market fund | Long-term Investments
Debt Securities, Available-for-sale [Line Items]
Market Value	0	0
Level 1 | U.S. Treasuries
Debt Securities, Available-for-sale [Line Items]
Cost Basis	17,985
Unrealized Gains (Losses)	(82)
Market Value	17,903
Level 1 | U.S. Treasuries | Cash and Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Market Value	0
Level 1 | U.S. Treasuries | Short-term Investments and Marketable Securities
Debt Securities, Available-for-sale [Line Items]
Market Value	17,903
Level 1 | U.S. Treasuries | Long-term Investments
Debt Securities, Available-for-sale [Line Items]
Market Value	0
Level 1 | U.S. Treasury bonds
Debt Securities, Available-for-sale [Line Items]
Cost Basis		8,171
Unrealized Gains (Losses)		0
Market Value		8,171
Level 1 | U.S. Treasury bonds | Cash and Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Market Value		0
Level 1 | U.S. Treasury bonds | Short-term Investments and Marketable Securities
Debt Securities, Available-for-sale [Line Items]
Market Value		8,171
Level 1 | U.S. Treasury bonds | Long-term Investments
Debt Securities, Available-for-sale [Line Items]
Market Value		0
Level 2 | Commercial paper
Debt Securities, Available-for-sale [Line Items]
Cost Basis	23,110	23,312
Unrealized Gains (Losses)	0	0
Market Value	23,110	23,312
Level 2 | Commercial paper | Cash and Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Market Value	0	0
Level 2 | Commercial paper | Short-term Investments and Marketable Securities
Debt Securities, Available-for-sale [Line Items]
Market Value	23,110	23,312
Level 2 | Commercial paper | Long-term Investments
Debt Securities, Available-for-sale [Line Items]
Market Value	0	0
Level 2 | Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Cost Basis	15,397	20,107
Unrealized Gains (Losses)	(130)	(14)
Market Value	15,267	20,093
Level 2 | Corporate bonds | Cash and Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Market Value	0	0
Level 2 | Corporate bonds | Short-term Investments and Marketable Securities
Debt Securities, Available-for-sale [Line Items]
Market Value	13,245	8,049
Level 2 | Corporate bonds | Long-term Investments
Debt Securities, Available-for-sale [Line Items]
Market Value	2,022	12,044
Level 2 | Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Cost Basis	5,493	15,655
Unrealized Gains (Losses)	(3)	(8)
Market Value	5,490	15,647
Level 2 | Asset-backed securities | Cash and Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Market Value	0	0
Level 2 | Asset-backed securities | Short-term Investments and Marketable Securities
Debt Securities, Available-for-sale [Line Items]
Market Value	5,490	15,647
Level 2 | Asset-backed securities | Long-term Investments
Debt Securities, Available-for-sale [Line Items]
Market Value	$ 0	$ 0

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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