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Fair Value Measurements - Summary of change in fair value of preferred stock warrant liability (Detail) - Series C Preferred Stock Warrant Liability [Member]
$ in Thousands
12 Months Ended
Dec. 31, 2021
USD ($)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]  
Fair value, Beginning Balance $ 433
Issuance of new warrants 271
Change in fair value 153
Warrant exercises (857)
Fair value, Ending Balance $ 0