Investments - Summary of Financial Assets Recorded at Fair Value On Recurring Basis (Details) - Fair Value, Recurring - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Fair value measurements
Total financial assets	$ 130,605	$ 315,229
Sovereign Treasury Securities
Fair value measurements
Cash and cash equivalents	24,807	55,938
Investments in securities	35,672	205,779
Warrants
Fair value measurements
Investments in securities	254	153
Money Market Funds
Fair value measurements
Cash and cash equivalents	60,616	41,210
Common Stock
Fair value measurements
Investments in securities	9,256	12,149
Level 1
Fair value measurements
Total financial assets	9,510	12,302
Level 1 \| Warrants
Fair value measurements
Investments in securities	254	153
Level 1 \| Common Stock
Fair value measurements
Investments in securities	9,256	12,149
Level 2
Fair value measurements
Total financial assets	121,095	302,927
Level 2 \| Sovereign Treasury Securities
Fair value measurements
Cash and cash equivalents	24,807	55,938
Investments in securities	35,672	205,779
Level 2 \| Money Market Funds
Fair value measurements
Cash and cash equivalents	$ 60,616	$ 41,210

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.

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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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