Financial Instruments and Fair Value Measurements - Measurements on Recurring Basis (Details) - Recurring basis - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Financial instruments and fair value measurements
Total	$ 59,809	$ 133,818
Level 1
Financial instruments and fair value measurements
Total	59,809	133,368
Level 2
Financial instruments and fair value measurements
Total		450
Cash equivalents
Financial instruments and fair value measurements
Cash equivalents	19,233	44,412
Cash equivalents \| Level 1
Financial instruments and fair value measurements
Cash equivalents	19,233	44,412
Cash equivalents \| Money market fund
Financial instruments and fair value measurements
Cash equivalents	19,233	40,412
Cash equivalents \| Money market fund \| Level 1
Financial instruments and fair value measurements
Cash equivalents	19,233	40,412
Cash equivalents \| U.S. Treasury Bills
Financial instruments and fair value measurements
Cash equivalents		4,000
Cash equivalents \| U.S. Treasury Bills \| Level 1
Financial instruments and fair value measurements
Cash equivalents		4,000
Available-for-sale, Debt securities
Financial instruments and fair value measurements
Investments	40,576	88,956
Available-for-sale, Debt securities \| Level 1
Financial instruments and fair value measurements
Investments	40,576	88,956
Available-for-sale, Debt securities \| U.S. Treasury Bills
Financial instruments and fair value measurements
Investments	40,576	88,956
Available-for-sale, Debt securities \| U.S. Treasury Bills \| Level 1
Financial instruments and fair value measurements
Investments	$ 40,576	88,956
Equity securities
Financial instruments and fair value measurements
Investments		450
Equity securities \| Level 2
Financial instruments and fair value measurements
Investments		450
Equity securities \| Preferred stock
Financial instruments and fair value measurements
Investments		450
Equity securities \| Preferred stock \| Level 2
Financial instruments and fair value measurements
Investments		$ 450

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

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- Definition

Fair value portion 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.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

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