Product Revenue - Additional Information (Detail) - USD ($)	6 Months Ended
Jun. 30, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Accounts receivable	$ 23,479,000	$ 22,497,000
Bad debt write-offs	0
Credit losses	0	0
Product Revenue [Member]
Disaggregation of Revenue [Line Items]
Accounts receivable	$ 20,300,000	$ 20,000,000.0

Amount of allowance for credit loss on accounts receivable, classified as current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Amount of direct write-downs of accounts receivable charged against the allowance.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The total amount due to the entity within one year of the balance sheet date (or one operating cycle, if longer) from outside sources, including trade accounts receivable, notes and loans receivable, as well as any other types of receivables, net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value.

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