Fair Value Measurements - Schedule of Fair Value Hierarchy (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents at fair value	$ 170,907	$ 188,469
Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents at fair value	25,090	25,028
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents at fair value	195,997	234,492
Investments at fair value	104,878	131,352
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level I)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents at fair value	170,907	188,469
Investments at fair value	0	0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level II)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents at fair value	25,090	46,023
Investments at fair value	104,878	131,352
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level III)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents at fair value	0	0
Investments at fair value	0	0
Fair Value, Measurements, Recurring | Corporate bonds and commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents at fair value		996
Investments at fair value	44,219	31,239
Fair Value, Measurements, Recurring | Corporate bonds and commercial paper | Quoted Prices in Active Markets for Identical Assets (Level I)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents at fair value		0
Investments at fair value	0	0
Fair Value, Measurements, Recurring | Corporate bonds and commercial paper | Significant Other Observable Inputs (Level II)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents at fair value		996
Investments at fair value	44,219	31,239
Fair Value, Measurements, Recurring | Corporate bonds and commercial paper | Significant Unobservable Inputs (Level III)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents at fair value		0
Investments at fair value	0	0
Fair Value, Measurements, Recurring | U.S. government securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents at fair value		19,999
Investments at fair value	48,498	90,106
Fair Value, Measurements, Recurring | U.S. government securities | Quoted Prices in Active Markets for Identical Assets (Level I)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents at fair value		0
Investments at fair value	0	0
Fair Value, Measurements, Recurring | U.S. government securities | Significant Other Observable Inputs (Level II)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents at fair value		19,999
Investments at fair value	48,498	90,106
Fair Value, Measurements, Recurring | U.S. government securities | Significant Unobservable Inputs (Level III)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents at fair value		0
Investments at fair value	0	0
Fair Value, Measurements, Recurring | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents at fair value	170,907	188,469
Fair Value, Measurements, Recurring | Money market funds | Quoted Prices in Active Markets for Identical Assets (Level I)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents at fair value	170,907	188,469
Fair Value, Measurements, Recurring | Money market funds | Significant Other Observable Inputs (Level II)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents at fair value	0	0
Fair Value, Measurements, Recurring | Money market funds | Significant Unobservable Inputs (Level III)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents at fair value	0	0
Fair Value, Measurements, Recurring | Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents at fair value	25,090	25,028
Investments at fair value	12,161	10,007
Fair Value, Measurements, Recurring | Certificates of deposit | Quoted Prices in Active Markets for Identical Assets (Level I)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents at fair value	0	0
Investments at fair value	0	0
Fair Value, Measurements, Recurring | Certificates of deposit | Significant Other Observable Inputs (Level II)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents at fair value	25,090	25,028
Investments at fair value	12,161	10,007
Fair Value, Measurements, Recurring | Certificates of deposit | Significant Unobservable Inputs (Level III)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents at fair value	0	0
Investments at fair value	$ 0	$ 0