Fair Value Measurements - Financial Assets Measured At Fair Value On A Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financial Assets:
Debt securities, available-for-sale	$ 20,132	$ 27,032
Level 1 | Fair Value, Recurring
Financial Assets:
Debt securities, available-for-sale	1,889	4,482
Total	94,693	88,272
Level 2 | Fair Value, Recurring
Financial Assets:
Debt securities, available-for-sale	18,243	22,550
Total	18,243	22,550
Level 3 | Fair Value, Recurring
Financial Assets:
Debt securities, available-for-sale	0	0
Total	0	0
Cash | Level 1 | Fair Value, Recurring
Financial Assets:
Cash and cash equivalents	90,951	77,423
Cash | Level 2 | Fair Value, Recurring
Financial Assets:
Cash and cash equivalents	0	0
Cash | Level 3 | Fair Value, Recurring
Financial Assets:
Cash and cash equivalents	0	0
Money market mutual fund | Level 1 | Fair Value, Recurring
Financial Assets:
Cash and cash equivalents	1,853	6,367
Money market mutual fund | Level 2 | Fair Value, Recurring
Financial Assets:
Cash and cash equivalents	0	0
Money market mutual fund | Level 3 | Fair Value, Recurring
Financial Assets:
Cash and cash equivalents	$ 0	$ 0