Fair Value Measurements - Change in Estimated Fair Values Calculated for Investment Valued on Recurring Basis Utilizing Level 3 Inputs (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($)
Fair Value Disclosures [Abstract]
Balance at the beginning of the period	$ 2,517
Credit gain on available-for-sale security included in Other income (expense), net	4
Gain included in Other comprehensive income	118
Balance at the end of the period	$ 2,639