Available-for-Sale Marketable Securities in Unrealized Position (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	$ 9,932	$ 6,563
Less than 12 Months, Unrealized Loss	(77)	(38)
12 Months or Greater, Fair Value	39,953	43,285
12 Months or Greater, Unrealized Loss	(955)	(1,177)
Total, Fair Value	49,885	49,848
Total, Unrealized Loss	(1,032)	(1,215)
Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	1,382	1,466
Less than 12 Months, Unrealized Loss	(11)	(12)
12 Months or Greater, Fair Value	26,351	29,647
12 Months or Greater, Unrealized Loss	(416)	(626)
Total, Fair Value	27,733	31,113
Total, Unrealized Loss	(427)	(638)
United States government agency securities
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	8,316	4,855
Less than 12 Months, Unrealized Loss	(59)	(25)
12 Months or Greater, Fair Value	11,057	10,991
12 Months or Greater, Unrealized Loss	(226)	(289)
Total, Fair Value	19,373	15,846
Total, Unrealized Loss	(285)	(314)
Mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	234	242
Less than 12 Months, Unrealized Loss	(7)	(1)
12 Months or Greater, Fair Value	2,545	2,647
12 Months or Greater, Unrealized Loss	(313)	(262)
Total, Fair Value	2,779	2,889
Total, Unrealized Loss	$ (320)	$ (263)