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Summary of Significant Accounting Policies - Concentrations (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022
Concentration risk
Cash and cash equivalents	$ 60,627	$ 37,747	$ 21,851
Investments - debt securities	27,931	$ 40,576
Credit concentration risk \| Assets \| Money market fund
Concentration risk
Cash and cash equivalents	1,700
Credit concentration risk \| Assets \| U.S. Treasury Bills
Concentration risk
Cash and cash equivalents	29,900
Investments - debt securities	$ 27,900