Fair Value Measurements - Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Fair Value Measurements
Total	$ 6,281	$ 0
Level 1 [Member]
Fair Value Measurements
Total	1,171
Level 2 [Member]
Fair Value Measurements
Total	5,110
Level 3 [Member]
Fair Value Measurements
Total	0
Mutual funds [Member]
Fair Value Measurements
Total	1,171
Mutual funds [Member] | Level 1 [Member]
Fair Value Measurements
Total	1,171
Mutual funds [Member] | Level 2 [Member]
Fair Value Measurements
Total	0
Mutual funds [Member] | Level 3 [Member]
Fair Value Measurements
Total	0
US Treasury securities [Member]
Fair Value Measurements
Total	3,278
US Treasury securities [Member] | Level 1 [Member]
Fair Value Measurements
Total	0
US Treasury securities [Member] | Level 2 [Member]
Fair Value Measurements
Total	3,278
US Treasury securities [Member] | Level 3 [Member]
Fair Value Measurements
Total	0
Certificates of deposit [Member]
Fair Value Measurements
Total	859
Certificates of deposit [Member] | Level 1 [Member]
Fair Value Measurements
Total	0
Certificates of deposit [Member] | Level 2 [Member]
Fair Value Measurements
Total	859
Certificates of deposit [Member] | Level 3 [Member]
Fair Value Measurements
Total	0
Corporate bonds and notes [Member]
Fair Value Measurements
Total	973
Corporate bonds and notes [Member] | Level 1 [Member]
Fair Value Measurements
Total	0
Corporate bonds and notes [Member] | Level 2 [Member]
Fair Value Measurements
Total	973
Corporate bonds and notes [Member] | Level 3 [Member]
Fair Value Measurements
Total	$ 0