Fair Value Measurements - Additional Information (Details) - USD ($) |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2020 |
Sep. 30, 2019 |
Sep. 30, 2020 |
Sep. 30, 2019 |
Dec. 31, 2019 |
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| Fair Value Disclosures [Abstract] | |||||
| Fair value, assets, level 1 to level 2 transfers, amount | $ 0 | $ 0 | $ 0 | $ 0 | |
| Fair value, assets, level 2 to level 1 transfers, amount | 0 | 0 | 0 | 0 | |
| Fair value, measurement with unobservable inputs reconciliation, recurring basis, asset, transfers, net | 0 | $ 0 | 0 | $ 0 | |
| Available-for-sale securities | $ 118,074,000 | $ 118,074,000 | $ 0 | ||
| X | ||||||||||
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of transfers of assets measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of transfers of assets measured on a recurring basis out of Level 2 of the fair value hierarchy into Level 1. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of transfer of financial instrument classified as an asset into (out of) level 3 of the fair value hierarchy. No definition available.
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