Investments in Marketable Securities - Summary of Investments Classified As Available-For-Sale Securities (Parenthetical) (Detail)	Mar. 31, 2022 USD ($) Security	Dec. 31, 2021 USD ($) Security
Schedule of Available-for-sale Securities [Line Items]
Number of securities in unrealized gain position \| Security	1	3
Number of securities in unrealized loss position \| Security	64	75
Unrealized losses, aggregate	$ 1,444,000	$ 546,000
Short-term investments – available for sale	172,445,000	175,732,000
Unrealized gains, aggregate	2,000	1,000
Certificates of deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Short-term investments – available for sale	504,000	504,000
Short-term investments classified as available-for-sale, noncurrent	32,300,000	56,700,000
Commercial paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Short-term investments – available for sale	35,450,000	32,032,000
Short-term investments classified as available-for-sale, noncurrent	32,300,000	56,700,000
Corporate debt securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Unrealized losses, aggregate	1,444,000	546,000
Short-term investments – available for sale	136,491,000	143,196,000
Short-term investments classified as available-for-sale, noncurrent	32,300,000	56,700,000
Unrealized gains, aggregate	2,000	1,000
Cash equivalents [Member] \| Certificates of deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Short-term investments – available for sale	0	0
Cash equivalents [Member] \| Commercial paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Short-term investments – available for sale	0	0
Cash equivalents [Member] \| Corporate debt securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Short-term investments – available for sale	0	0
Maximum [Member]
Schedule of Available-for-sale Securities [Line Items]
Unrealized gains, individually	2,000	1,000
Unrealized losses, individually	169,000	73,000
Unrealized losses, aggregate	$ 1,444,000	550,000
Unrealized gains, aggregate		$ 2,000

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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