Available-for-Sale Marketable Securities in Unrealized Position (Detail) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	$ 944	$ 6,563
Less than 12 Months, Unrealized Loss	(2)	(38)
12 Months or Greater, Fair Value	26,549	43,285
12 Months or Greater, Unrealized Loss	(272)	(1,177)
Total, Fair Value	27,493	49,848
Total, Unrealized Loss	(274)	(1,215)
Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	944	1,466
Less than 12 Months, Unrealized Loss	(2)	(12)
12 Months or Greater, Fair Value	12,451	29,647
12 Months or Greater, Unrealized Loss	(35)	(626)
Total, Fair Value	13,395	31,113
Total, Unrealized Loss	(37)	(638)
United States government agency securities
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	0	4,855
Less than 12 Months, Unrealized Loss	0	(25)
12 Months or Greater, Fair Value	11,571	10,991
12 Months or Greater, Unrealized Loss	(37)	(289)
Total, Fair Value	11,571	15,846
Total, Unrealized Loss	(37)	(314)
Mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	0	242
Less than 12 Months, Unrealized Loss	0	(1)
12 Months or Greater, Fair Value	2,527	2,647
12 Months or Greater, Unrealized Loss	(200)	(262)
Total, Fair Value	2,527	2,889
Total, Unrealized Loss	$ (200)	$ (263)