Fair Value Measurements - Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Fair Value Measurements
Total	$ 4,087	$ 4,396
Level 1 [Member]
Fair Value Measurements
Total	2,123	1,505
Level 2 [Member]
Fair Value Measurements
Total	1,964	2,891
Level 3 [Member]
Fair Value Measurements
Total	0	0
Mutual funds [Member]
Fair Value Measurements
Total	2,123	1,505
Mutual funds [Member] | Level 1 [Member]
Fair Value Measurements
Total	2,123	1,505
Mutual funds [Member] | Level 2 [Member]
Fair Value Measurements
Total	0	0
Mutual funds [Member] | Level 3 [Member]
Fair Value Measurements
Total	0	0
US Treasury securities [Member]
Fair Value Measurements
Total	1,298	1,803
US Treasury securities [Member] | Level 1 [Member]
Fair Value Measurements
Total	0	0
US Treasury securities [Member] | Level 2 [Member]
Fair Value Measurements
Total	1,298	1,803
US Treasury securities [Member] | Level 3 [Member]
Fair Value Measurements
Total	0	0
Certificates of deposit [Member]
Fair Value Measurements
Total	413	103
Certificates of deposit [Member] | Level 1 [Member]
Fair Value Measurements
Total	0	0
Certificates of deposit [Member] | Level 2 [Member]
Fair Value Measurements
Total	413	103
Certificates of deposit [Member] | Level 3 [Member]
Fair Value Measurements
Total	0	0
Corporate debt securities [Member]
Fair Value Measurements
Total	253	985
Corporate debt securities [Member] | Level 1 [Member]
Fair Value Measurements
Total	0	0
Corporate debt securities [Member] | Level 2 [Member]
Fair Value Measurements
Total	253	985
Corporate debt securities [Member] | Level 3 [Member]
Fair Value Measurements
Total	$ 0	$ 0