Fair Value of Financial Assets and Liabilities - Changes in Level 3 Securities (Details) - Level 3 $ in Thousands	6 Months Ended
Jun. 30, 2022 USD ($)
Fair Value of Financial Assets
Initial recording of RareStone equity	$ 1,040
Change in fair value of embedded derivative	(300)
Ending aggregate estimated fair value of Level 3 RareStone equity	$ 740

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.

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Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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