Summary of Significant Accounting Policies - Summary of Unrealized Portion Related to Equity Securities (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Equity Securities, FV-NI, Gain (Loss) [Abstract]
Net losses recognized during the period on equity securities	$ (77)	$ 0	$ (229)	$ (31)
Less: Net gains (losses) recognized during the period on equity securities sold during the period	0	0	0	0
Unrealized losses recognized during the reporting period on equity securities still held at the reporting date	$ (77)	$ 0	$ (229)	$ (31)