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Fair Values on Financial Assets and Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Money market funds
Fair value of financial assets and liabilities
Total short-term investments	$ 5,472	$ 14,472
Short-term Investments
Fair value of financial assets and liabilities
Total short-term investments	69,340	81,041
United States government agency securities | Short-term Investments
Fair value of financial assets and liabilities
Total short-term investments	26,451	26,423
Corporate debt securities | Short-term Investments
Fair value of financial assets and liabilities
Total short-term investments	34,208	36,795
Mortgage-backed securities | Short-term Investments
Fair value of financial assets and liabilities
Total short-term investments	3,209	3,351
Level 1 | Money market funds
Fair value of financial assets and liabilities
Total short-term investments	5,472	14,472
Level 1 | Short-term Investments
Fair value of financial assets and liabilities
Total short-term investments	5,472	14,472
Level 2 | Short-term Investments
Fair value of financial assets and liabilities
Total short-term investments	63,868	66,569
Level 2 | United States government agency securities | Short-term Investments
Fair value of financial assets and liabilities
Total short-term investments	26,451	26,423
Level 2 | Corporate debt securities | Short-term Investments
Fair value of financial assets and liabilities
Total short-term investments	34,208	36,795
Level 2 | Mortgage-backed securities | Short-term Investments
Fair value of financial assets and liabilities
Total short-term investments	$ 3,209	$ 3,351

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- Definition

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

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