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Fair Value of Financial Instruments - Additional Information (Detail) - USD ($) | Dec. 31, 2021 | Nov. 30, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Fair Value Of Financial Instruments [Line Items] |  |  |
Cash and cash equivalents | $ 124,184,000 |  | $ 67,005,000
Restricted cash |  |  | 158,000
Short-term investments | 79,932,000 |  |
Long-term investments | 56,619,000 |  |
Financing liability, long term | 93,525,000 | $ 93,500,000 |
Financing liability, short term | 6,977,000 | $ 7,000,000.0 |
Convertible Promissory Note | Thirona Bio, Inc. |  |  |
Fair Value Of Financial Instruments [Line Items] |  |  |
Investment securities | 3,000,000.0 |  |
Held-to-Maturity Investments |  |  |
Fair Value Of Financial Instruments [Line Items] |  |  |
Short-term investments | 79,900,000 |  |
Long-term investments | 56,600,000 |  |
Investments |  |  | 0
Money Market Funds |  |  |
Fair Value Of Financial Instruments [Line Items] |  |  |
Cash and cash equivalents | 124,200,000 |  | 67,000,000.0
Restricted cash | $ 0 |  | $ 200,000

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=124260329&loc=d3e26610-111562 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563 + Details
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3044-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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