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Balance Sheet Details - Schedule of Other Current Assets and Prepaid Expenses (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Prepaid clinical and related costs	$ 11,895	$ 14,853
VAT receivable	397	279
Australian research and development tax incentive	2,875	1,871
Other	1,516	1,122
Total	$ 16,683	$ 18,125

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Amount of current assets classified as other.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Carrying amount as of the balance sheet date of value added taxes due either from customers arising from sales on credit terms, or as previously overpaid to tax authorities. For classified balance sheets, represents the current amount receivable, that is amounts expected to be collected within one year or the normal operating cycle, if longer.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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