Summary of Significant Accounting Policies - Schedule of Financial Assets and Financial Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financial liabilities carried at fair value:
Term loan derivative liability		$ 196
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Money Market Funds [Member]
Financial assets carried at fair value:
Money market funds	$ 35,835	44,095
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Term Loan Derivative Liability [Member]
Financial liabilities carried at fair value:
Term loan derivative liability	$ 114	$ 196