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Fair Value Measurement (Tables) | 12 Months Ended
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Dec. 31, 2022
Fair Value Disclosures [Abstract] |
Available-for-sale marketable securities | Available-for-sale marketable securities consisted of the following (in thousands):
|  | December 31, 2022
|  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Estimated Fair Value
Asset-backed securities |  | $ | 1,146 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,146 |
Corporate debt securities |  | 7,139 |  |  | — |  |  | (9) |  |  | 7,130 |
U.S. Treasury securities |  | 111,469 |  |  | — |  |  | (934) |  |  | 110,535 |
Agency bonds |  | 2,783 |  |  | 2 |  |  | (1) |  |  | 2,784 |
Commercial paper |  | 7,004 |  |  | — |  |  | — |  |  | 7,004 |
|  | $ | 129,541 |  |  | $ | 2 |  |  | $ | (944) |  |  | $ | 128,599 |
|  | December 31, 2021
|  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Estimated Fair Value
Asset-backed securities |  | $ | 32,745 |  |  | $ | — |  |  | $ | (53) |  |  | $ | 32,692 |
Corporate debt securities |  | 58,885 |  |  | — |  |  | (86) |  |  | 58,799 |
U.S. Treasury securities |  | 231,230 |  |  | — |  |  | (469) |  |  | 230,761 |
Non-U.S. Government Securities |  | 17,232 |  |  | — |  |  | (12) |  |  | 17,220 |
Commercial paper |  | 282,731 |  |  | — |  |  | — |  |  | 282,731 |
|  | $ | 622,823 |  |  | $ | — |  |  | $ | (620) |  |  | $ | 622,203 |
Investments Classified by Contractual Maturity Date [Table Text Block] | The estimated fair value of our contractual maturities of available-for-sale debt securities are as follows (in thousands):
|  | December 31, 2022 |  | December 31, 2021
Due within one year |  | $ | 114,353 |  |  | $ | 500,965 |
After one but within five years |  | 14,246 |  |  | 121,238 |
|  | $ | 128,599 |  |  | $ | 622,203 |
Fair Value, Assets Measured on Recurring Basis [Table Text Block] | The following table summarizes, by major security type, our cash equivalents and available-for-sale marketable securities that are measured at fair value on a recurring basis and are categorized using the fair value hierarchy (in thousands):
|  | December 31, 2022 |  | December 31, 2021
|  | Level 1 |  | Level 2 |  | Total estimated fair value |  | Level 1 |  | Level 2 |  | Total estimated fair value
Cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 191,704 |  |  | $ | — |  |  | $ | 191,704 |  |  | $ | 118,707 |  |  | $ | — |  |  | $ | 118,707 |
Available-for-sale marketable securities: |  |  |  |  |  |  |  |  |  |  |  |
Asset-backed securities |  | — |  |  | 1,146 |  |  | 1,146 |  |  | — |  |  | 32,692 |  |  | 32,692 |
Corporate debt securities |  | — |  |  | 7,130 |  |  | 7,130 |  |  | — |  |  | 58,799 |  |  | 58,799 |
U.S. Treasury securities |  | 110,535 |  |  | — |  |  | 110,535 |  |  | 230,761 |  |  | — |  |  | 230,761 |
Non-US Government securities |  | — |  |  | — |  |  | — |  |  | — |  |  | 17,220 |  |  | 17,220 |
Agency bonds |  | 2,784 |  |  | — |  |  | 2,784 |  |  |  |  |  |  |
Commercial paper |  | — |  |  | 7,004 |  |  | 7,004 |  |  | — |  |  | 282,731 |  |  | 282,731 |
|  | $ | 305,023 |  |  | $ | 15,280 |  |  | $ | 320,303 |  |  | $ | 349,468 |  |  | $ | 391,442 |  |  | $ | 740,910 |

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- Definition Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 + Details
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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
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