Investments - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Other than temporary impairment losses	$ 27	$ 0	$ 27	$ 0
Net gain on investments	35	$ 0	36	$ 0
Prepaid Expenses and Other Current Assets [Member]
Accrued interest	$ 9		$ 9		$ 18

Amount of realized and unrealized gain (loss) on investment.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Publisher FASB
-Name Accounting Standards Codification
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