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Fair Values on Financial Assets and Liabilities (Detail) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Fair value of financial assets and liabilities |  |
Total short-term investments | $ 64,122 | $ 61,959
Investment, Type [Extensible Enumeration] | Short-Term Investments [Member] | Short-Term Investments [Member]
Money market funds |  |
Fair value of financial assets and liabilities |  |
Total short-term investments | $ 1,280 | $ 1,773
United States government agency securities |  |
Fair value of financial assets and liabilities |  |
Total short-term investments | $ 23,916 | $ 24,062
Investment, Type [Extensible Enumeration] | Short-Term Investments [Member] | Short-Term Investments [Member]
Corporate debt securities |  |
Fair value of financial assets and liabilities |  |
Total short-term investments | $ 36,274 | $ 33,371
Investment, Type [Extensible Enumeration] | Short-Term Investments [Member] | Short-Term Investments [Member]
Mortgage-backed securities |  |
Fair value of financial assets and liabilities |  |
Total short-term investments | $ 2,652 | $ 2,753
Investment, Type [Extensible Enumeration] | Short-Term Investments [Member] | Short-Term Investments [Member]
Level 1 |  |
Fair value of financial assets and liabilities |  |
Total short-term investments | $ 1,280 | $ 1,773
Investment, Type [Extensible Enumeration] | Short-Term Investments [Member] | Short-Term Investments [Member]
Level 1 | Money market funds |  |
Fair value of financial assets and liabilities |  |
Total short-term investments | $ 1,280 | $ 1,773
Level 2 |  |
Fair value of financial assets and liabilities |  |
Total short-term investments | $ 62,842 | $ 60,186
Investment, Type [Extensible Enumeration] | Short-Term Investments [Member] | Short-Term Investments [Member]
Level 2 | United States government agency securities |  |
Fair value of financial assets and liabilities |  |
Total short-term investments | $ 23,916 | $ 24,062
Investment, Type [Extensible Enumeration] | Short-Term Investments [Member] | Short-Term Investments [Member]
Level 2 | Corporate debt securities |  |
Fair value of financial assets and liabilities |  |
Total short-term investments | $ 36,274 | $ 33,371
Investment, Type [Extensible Enumeration] | Short-Term Investments [Member] | Short-Term Investments [Member]
Level 2 | Mortgage-backed securities |  |
Fair value of financial assets and liabilities |  |
Total short-term investments | $ 2,652 | $ 2,753
Investment, Type [Extensible Enumeration] | Short-Term Investments [Member] | Short-Term Investments [Member]

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- Definition Indicates type of investment. Includes, but is not limited to, common stock, preferred stock, convertible security, fixed income security, government security, option purchased, warrant, loan participation and assignment, commercial paper, bankers' acceptance, certificates of deposit, short-term security, repurchase agreement, and other investment company. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478795/946-210-50-6 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478795/946-210-50-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.12-12A(Column A)(Footnote 2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477271/946-320-S99-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column A)(Footnote 2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477271/946-320-S99-6 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12(Column A)(Footnote 2)(i)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477271/946-320-S99-1 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12(Column C)(Footnote 5)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477271/946-320-S99-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column A)(Footnote 1)(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477271/946-320-S99-3 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column C)(Footnote 2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477271/946-320-S99-3 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column F)(Footnote 7)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477271/946-320-S99-6 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.12-12A(Column C)(Footnote 4)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477271/946-320-S99-2 + Details
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