Convertible Notes and Loan Agreement - Schedule Of Interest Expense Recognized (Detail) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021
Debt Disclosure [Abstract]
Interest paid on 2025 Notes	$ 32	$ 126
Amortization of debt discount and transaction costs	1,248	654
Interest expense recognized	$ 1,280	$ 780

Amount of amortization expense attributable to debt discount (premium) and debt issuance costs.

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