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Fair Value Measurement - Summary of Fair Value of Redeemable Convertible Preferred Stock Warrants Liability and Derivative Liability (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Redeemable Convertible Preferred Stock Warrants |  |  |  |
Schedule Of Fair Value Of Redeemable Convertible Preferred Stock Warrants Liability And Derivative Liability [Roll Forward] |  |  |  |
Beginning balance | $ 0 | $ 840 |  |
Change in fair value | 0 | 1,024 |  |
Reclassification to APIC upon recapitalization | 0 | 0 |  |
Ending balance | 0 | 1,864 | $ 0 | $ 1,864
Derivative liability |  |  |  |
Schedule Of Fair Value Of Redeemable Convertible Preferred Stock Warrants Liability And Derivative Liability [Roll Forward] |  |  |  |
Beginning balance |  |  | 0 | 135
Change in fair value |  |  | 0 | 67
Ending balance | $ 0 | $ 202 | $ 0 | $ 202

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- Definition Fair Value Of Redeemable Convertible Preferred Stock Warrants Liability And Derivative Liability + References No definition available. + Details
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- Definition Fair value of warrant liability. + References No definition available. + Details
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- Definition Reclassification to APIC upon recapitalization. + References No definition available. + Details
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- Definition Amount of expense (income) related to adjustment to fair value of warrant liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section 25 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=109262497&loc=d3e20148-110875 + Details
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