Fair Value Measurements - Summary of Liabilities Measured at Fair Value on Recurring Basis (Details) - Recurring $ in Thousands	Dec. 31, 2020 USD ($)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, Amortized Cost	$ 181,848
Short-term investments, Gross Unrealized Holding Gains	17
Short-term investments, Gross Unrealized Holding Losses	(9)
Short-term investments, Aggregated Fair Value	181,856
Cash equivalents
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, Aggregated Fair Value	75,410
Short-term investments
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, Aggregated Fair Value	106,446
Level 1
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, Aggregated Fair Value	181,856
Within one year	160,304
After one year through two years	21,552
Level 1 \| Money Market Funds
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, Amortized Cost	46,134
Short-term investments, Aggregated Fair Value	46,134
Level 2 \| Commercial Paper
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, Amortized Cost	76,605
Short-term investments, Gross Unrealized Holding Losses	(2)
Short-term investments, Aggregated Fair Value	76,603
Level 2 \| Agency bonds
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, Amortized Cost	29,654
Short-term investments, Gross Unrealized Holding Gains	15
Short-term investments, Aggregated Fair Value	29,669
Level 2 \| U.S. government bonds
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, Amortized Cost	7,093
Short-term investments, Aggregated Fair Value	7,093
Level 2 \| Corporate Debt
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, Amortized Cost	11,890
Short-term investments, Gross Unrealized Holding Losses	(6)
Short-term investments, Aggregated Fair Value	11,884
Level 2 \| U.S. treasury bills
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, Amortized Cost	4,680
Short-term investments, Aggregated Fair Value	4,680
Level 2 \| Agency discount securities
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, Amortized Cost	200
Short-term investments, Aggregated Fair Value	200
Level 2 \| Municipal Bonds
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments, Amortized Cost	5,592
Short-term investments, Gross Unrealized Holding Gains	2
Short-term investments, Gross Unrealized Holding Losses	(1)
Short-term investments, Aggregated Fair Value	$ 5,593

Available for sale securities debt maturities after one through two years fair value.

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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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).

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